Add your comments. Write skeleton half-reactions. The teacher mixed copper and nitric acid, and im having trouble finding not so much the answer but why this answer is this. Assume that nitric acid is reduced to NO2. The products are oxides of nitrogen instead of hydrogen. A red coloured mixed oxide (X) on treatment with concentrate H N O 3 gives a compound (Y). Write balance equation for the reaction of copper with concentrated nitric acid to form copper(II)nitrate. Nitric acid (H NO 3), also known as aqua fortis (Latin for "strong water") and spirit of niter, is a highly corrosive mineral acid.. Copper metal "dissolves" in nitric acid (HNO 3). 1) Copper is oxidized by concentrated nitric acid. 2)The copper oxide is attacked by the excess HNO3: 3CuO + 6HNO3 = 3Cu(NO3)2 + 3H2O. Aluminum and zinc do not react with concentrated nitric acid since a thick, hard to dissolve oxidation layer builds (passive oxidation) that protects the metal against further assaults. Normally, copper is less reactive metal and can not liberate H 2 gas with acids. Cu (s) + 4HNO3 (aq) → Cu(NO3)2 (aq) + 2NO2 (g) + 2H2O (l) Write the balanced chemical equation for – Action of cold and dilute nitric acid on copper, Action of cone. Cu + 4HNO 3 –> Cu(NO 3) 2 + 2NO 2 + 2H 2 O. Most commercially available nitric acid has a concentration of 68% in water. While handling nitric acid you must wear gloves. The mechanics, in my opinion, likely involves a REDOX pathway with, for example, ${NO2}$ as a radical product in the case of concentrated Nitric acid proceeding, in this case, somewhat simply as follows: Nitric acid is not only a strong acid, it is an oxidizing agent. Best answer (i) Dilute nitric acid and Copper carbonate. Write a balanced chemical equation for the reaction of copper metal with concentrated nitric acid to pro­ duce copper(il) nitrate, nitrogen dioxide, and water. After the reaction, which of these final products are present? AKA-Penny Operated Nitric Acid Fountain Nitric acid acts upon copper to yield nitric oxide in an exothermic reaction. Bromine vapours are passed into a solution of ethyne in carbon tetrachloride. 1 Answer +1 vote . Answer: Cu(NO3)2 + 2 NO2. The nitric oxide produced may react with atmospheric oxygen to give nitrogen dioxide. (iii) Ammonia and Oxygen in the presence of a catalyst. 28 views. Very cool reaction. 3. asked Feb 28, 2019 in Chemistry by Anjal (76.7k points) Write an equation for the following reaction: Copper and concentrated nitric acid. View solution. Pelouze and Fremy described the reactions of copper and silver with nitric acid, and showed that tin differed from these in the production of, ammonia. JEE Main 2016: The reaction of zinc with dilute and concentrated nitric acid, respectively, produces: (A) N2O and NO2 (B) N2O and NO (C) NO and N2O (D If the nitric acid is dilute, the copper will be oxidized to form copper nitrate with nitric oxide as a byproduct. Priya said: (Wed, May 25, 2016 04:53:39 PM IST), Like this answer?Like 14Dislike 7⚐ Report, Pranjal said: (Thu, May 26, 2016 08:25:20 PM IST), Email *: (Required but will not be displayed). 1) Copper is oxidized by concentrated nitric acid. The answer sheet says the balanced chemical equation is 3 Cu + 8HNO3 = 3 Cu(NO3)2 + 2NO + 4 H2O The copper is below hydrogen on the activity series, so H2 cannot be formed by this acid-metal reaction. nitric acid on sulphur. A non-metal which reacts with concentrated nitric acid to form its own acid as one of the product. write the equation for the following reaction between copper concentrated nitric acid - Chemistry - TopperLearning.com | ibjvos55. Balancing redox reactions by the half-reaction method 1. asked Feb 28, 2019 in Chemistry by Anjal ( 76.7k points) study of compounds ... but of natural oxidation as a reaction of air and moisture. Give balanced equations for the following reactions: (i) Dilute nitric acid and Copper carbonate. Actually, the nitrate ion oxidizes the copper metal to copper ... We have seen this reaction before in the copper chloride lab). 3. It depends on whether the nitric acid is concentrated or not. The mechanics, in my opinion, likely involves a REDOX pathway with, for example, ${NO2}$ as a radical product in the case of concentrated Nitric acid proceeding, in this case, somewhat simply as follows: $\ce{Cu + 2 HNO3 -> Cu++ + 2 OH- + … The reaction comes to an end when the last of the copper is used up. But, when a copper piece is dipped in concentrated H 2 S O 4 , copper piece is found … 3Cu(s) + 8HNO3(aq) -> 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g) You should see tha NO coming off as a yellow/brown gas. The dissolution of the black deposit and copper in concentrated nitric acid: during the first 20 seconds, black deposit on copper dissolves in nitric acid and NO 2 gas evolution is insignificant. Cu + 4HNO 3 –> Cu (NO 3) 2 + 2NO 2 + 2H 2 O. This is a really old question, but just in case someone looks it up now; the result depends on the concentration of nitric acid that is used. 2) Calculate the volume of concentrated nitric acid (16M) required to react with 0.38 (g) of Cu(s). The gas produced when copper reacts with concentrated nitric acid. Red-brown nitrogen dioxide is generated and some of the copper dissolves to form a blue solution of copper (II) nitrate. Strong acids include nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. 4. https://www.sciencephoto.com/.../copper-reacts-with-nitric-acid-3-of-5 Pelouze and Fremy described the reactions of copper and silver with nitric acid, and showed that tin differed from these in the production of, ammonia. [Chemistry 1 HS] Copper and nitric acid net ionic equation We are doing a lab and which we find the molecular equation, ionic equation, and net ionic equation of a few problems. Copper does not react with non-oxidising acids like hydrochloric acid or dilute sulfuric acid. ... references Chemistry Comes Alive: Copper Penny … Concentrated nitric acid, HNO3, is hazardous. 2. The nitrogen dioxide is a maroon and toxic vapor. Like 14 Dislike 7 ⚐ Report. Reaction of conc. The answer sheet says the balanced chemical equation is 3 Cu + 8HNO3 = 3 Cu(NO3)2 + 2NO + 4 H2O The copper will dissolve in the acid producing noxious fumes of NO 2 (a brown gas that is involved in smog).Keep the beaker in the hood until the reaction is complete. Step I:Write the unbalanced chemical equation for the given reaction. water is also formed. This depends upon the concentration of nitric acid. All Rights Reserved | Copyright | Terms of Use & Privacy Policy, Contact us: info.meri- @ -tanswers@gma@il.com. There are actually two equations for the reaction of copper with nitric acid. Answer is C: Cu(NO3)2, NO, and H2O. HNO3 it produces. Dissolving brass requires an oxidizing acid such as concentrated nitric acid. Answer: Cold, dilute, nitric acid reacts with copper to given nitric oxide. Therefore, it can oxidize copper to Cu+2. The reaction of a copper penny (minted pre-1982) and concentrated nitric acid (15 M) is shown. It produces severe burns on the skin and the vapor is a lung irritant. mL of concentrated nitric acid (15 M HNO. Balance O by adding H 2 O. Concentrated nitric acid reacts with copper and produce copper nitrate (Cu (NO 3) 2), nitrogen dioxide (NO 2) gas and water as products. When the reaction ended and the gas formation came to an end, the remaining solution was dark blue. There are actually two equations for the reaction of copper with nitric acid. Name the gas produced when copper reacts with concentrated nitric acid. What volume, in mL, of concentrated nitric acid (15.8 M) is required to react with 1.1705 g of solid metallic copper? Nitrogen dioxide is produced as a byproduct in this reaction. Concentrated nitric acid is a very strong oxidator capable of reacting with the noble metals such as copper or silver (not gold, however). 5. Any acid spilled on the skin or splashed into your eyes must be rinsed with a large volume of water for 15 minutes. As its electrode (reduction) potential is higher than that of hydrogen, pure copper cannot displace hydrogen from such acids. The reactions between copper and nitric acid are examples of oxidation-reduction reactions, where gaining electrons reduces one element and losing them oxidizes the other. JEE Main 2016: The reaction of zinc with dilute and concentrated nitric acid, respectively, produces: (A) N2O and NO2 (B) N2O and NO (C) NO and N2O (D Nitric acid reacts with copper according to the reaction: 4 HNO 3 ( l ) + Cu( s ) ==> Cu(NO 3 ) 2 ( s and aq ) + 2 NO 2 ( g ) + 2 H 2 O( l ) The copper nitrate salt that forms is a deep blue color. 2. Copper is oxidized by concentrated nitric acid, HNO 3, to produce Cu 2+ ions; the nitric acid is reduced to nitrogen dioxide, a poisonous brown gas with an irritating odor: Cu(s) + 4HNO 3 (aq) ——> Cu(NO 3 ) 2 (aq) + 2NO 2 (g) + 2H 2 O(l) https://www.sciencephoto.com/.../copper-reacts-with-nitric-acid-1-of-5 Name the gas evolved (formula is not acceptable). Brass is an alloy - mixture of Copper and Zinc. After 20 seconds, intensive NO 2 gas evolution is observed because copper starts to dissolve: NO 2 fills the test-tube with red-brown colour. Explain why: a. » Your answers will be displayed only after manual approval. (ii) Concentrated hydrochloric acid and Potassium permanganate solution. For example, copper reacts with dilute nitric acid at ambient temperatures with a 3:8 stoichiometry: 3 Cu + 8 HNO 3 → 3 Cu 2+ + 2 NO + 4 H 2 O + 6 NO − 3. After the reaction, which of these final products are present? A sample of copper metal is reacted with concentrated nitric acid in the absence of air. HNO3. The chemical reaction should be balanced so that it can follow the law of conservation of mass. Question 1. Concentrated nitric acid is a very strong oxidator capable of reacting with the noble metals such as copper or silver (not gold, however). Correct the following statements.Copper reacts with nitric acid to produce nitrogen dioxide. Copper penny with concentrated nitric acid. The gas produced on reaction of dilute sulphuric acid with a metallic sulphide: [5] (b) State one observation for each of the following: Excess ammonium hydroxide solution is added to lead nitrate solution. If the acid used is concentrated, there will also be red fumes of NO2, and Water will be formed from Oxygen and Hydrogen of the acid. Question 3. Category Education The gas produced by the action of dilute nitric acid on copper. The nitrogen dioxide is a maroon vapor. Asked by parindu_2006 | 12th Feb, … The equation is . Copper in fuming nitric acid-upon dilution, a vigorous reaction occurs. Balance H by adding H +. 3) to the beaker. study of compounds; nitric acid; icse; class-10; Share It On Facebook Twitter Email. Balance all elements other than O and H. 3. Write the equation for the reaction in which copper is oxidized by concentrated nitric acid. Charles C. Lv 7. Copper metal will not react with dilute nitric acid. Laboratory preparation of ni- trie acid. Both the metals react with acids. Cu(s) + 4HNO3(aq) --> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l). Write balanced chemical equation for: Action of hot and concentrated nitric acid on copper. When the gas cools, the water is drawn back into the flask, dissolving the nitric oxide and forming a blue solution with the copper ions still there. Reaction of Copper is Heated with Conc. Like this answer? (v) Zinc sulphide and Dilute sulphuric acid. Iodine reacts with concentrated nitric acid according to the following equation: ... Nitric acid does not react with : View solution. HNO3 ... Copper is oxidized by concentrated nitric acid, HNO3, to produce Cu2+ ions; the nitric acid is reduced to nitrogen dioxide, a poisonous brown gas with an irritating odor. 1 decade ago. b. Nitric acid is kept in a reagent bottle for a long time. Conditions for the effective dissolution of sulfides without the isolation of elemental sulfur and iron oxides are determined at 20 and 100°C using “potential-pH” thermodynamic diagrams in the Cu-Fe-S-N-O-H system. In this reaction, copper is oxidized to its +2 oxidation state while nitric acid is reduced to nitrogen dioxide. In the reaction of Copper and Nitric acid, Copper nitrate, nitric oxide and water are produced. According to the concentration of nitric acid, different products are given. (ii) Concentrated hydrochloric acid and Potassium permanganate solution. 1) Write the net ionic equation for the reaction of concentrated nitric acid with solid copper. In this video, we test out the reactions of copper with dilute and concentrated nitric acid, and see if the concentration of an acid would affect its eventual result. write the equation for the following reaction between copper concentrated nitric acid - Chemistry - TopperLearning.com | ibjvos55 ... Write the equation for the following reaction: Between copper & concentrated nitric acid. Asked by: Serali Hembram on May 12, 2016. When copper is heated with conc. Cu + HNO3 → Cu(NO3)2 + NO + H2O Step II: List the number of atoms of the various elements present in the unbalanced equation in the form of a table. Only all-glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate. Answer is C: Cu(NO3)2, NO, and H2O. The chemical equation for this reaction is complex, and is already provided for you. Copper is oxidized by concentrated nitric acid, HNO3, to produce Cu2+ ions; the nitric acid is reduced to nitrogen dioxide, a poisonous brown gas with an irritating odor. This reaction occurs in two steps. 2017. Record your observations on the Data Sheet. Write a balanced reaction equation for oxidation of carbon with concentrated nitric acid. Nitrogen dioxide is produced as a by-product in this reaction. The actual nitrogen oxide formed depends on the concentration and temperature of the acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water. This reaction occurs in two steps. The balanced equation for the reaction of copper metal with concentrated nitric acid is: Copper is oxidized by concentrated nitric acid. Write a balanced chemical equation for the reaction of copper metal with concentrated nitric acid to produce copper (II) nitrate, nitrogen dioxide, and water. Although pure concentrated nitric acid is colourless, it appears yellow when left standing in a glass bottle due to … After the reaction, color of the solution which contains Cu (NO 3) 2 is blue. (Y) with HCl, produces a chloride compound (Z) which can also be produced by treating (X) with concentrate HCl. The very slight action of pure nitric acid of 30 per cent, concentration on pure metals was almost … The reaction between the copper and the nitric acid is exothermic. nitric acid with copper: Cu + 4HNO 3 → Cu(NO 3) + 2H 2 O + 2NO 2. Reaction of CuO with nitric acid, left to right: fuming, concentrated, and diluted HNO 3 (top) 1 hour and (bottom) several days after mixing the reagents. If the solution is concentrated, the copper will be oxidized to form copper nitrate with nitrogen dioxide as a byproduct. It depends on whether the nitric acid is concentrated or not. If dilute nitric is used, nitric oxide (NO) is given. Rinse your hands with tap water after handling HNO3. This makes the copper the yield limiting reagent. Copper reacts with concentrated nitric acid to produce copper (II) nitrate, nitrogen dioxide and water. Copper and nitric acid reaction With copper, dilute nitric acid and concentrated nitric acid behave as an oxidizing acid. There are actually two equations for the reaction of copper with nitric acid. Question 9. [Cu(H 2 O) 6] 2+ (aq) + Zn (s) --> Cu (s) + Zn 2+ (aq) + 6 H 2 O (aq) At the same time, some of the zinc metal, which is present in excess, reduces hydronium ions to H 2.Zn (s) + 2 H 3 O + (aq) --> Zn 2+ (aq) + H 2 (g) + 2 H 2 O (l ... Use about … Copper metal reacts with concentrated nitric acid according to the following balanced equation: 3Cu(s) + 8HNO3(aq) ¨ 3Cu(NO3)2(s) + 2NO(g) + 4H2O(l) Calculate the mass in grams of the excess reagent remaining after the complete reaction of 4.63 g of Cu with 9.26 g … A. Title: REACTION BETWEEN NITRIC ACID AND COPPER Author: Lancelot Salisbury Bagster Created Date: 6/2/2017 3:33:34 PM Name the gas produced in the reaction: Action of concentrated nitric acid on copper. If it is concentrated and in excess then the ratio is 1:4 copper to nitric acid. (iv) Silver nitrate solution and Sodium chloride solution. Action of heat on a mixture of copper and concentrated nitric acid. In this case Copper will form Cupric nitrate - as Nitric acid is a strong oxidising agent, liberating Hydrogen gas. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. Nitric acid is an oxidizing agent and the reaction is not the usual acid + metal reaction. If it is dilute then the ratio is 3:8. Write an equation for the following reaction: Copper and concentrated nitric acid. Dissolving brass requires an oxidizing acid such as nitric acid. In this reaction, the gases liberated can be NO, NO2. The reaction of Cu with nitric acid Cu (s) + 4HNO 3(aq) Cu(NO 3) 2(aq) + 2NO 2(g) + 2H 2 O (l) For the synthesis of copper (II) nitrate, concentrated nitric acid was mixed with the metallic copper in a beaker which formed a dark green liquid. Nitric acid reacts with copper according to the reaction: 4HNO*3(l) + Cu(s) → Cu(NO3)2(s) + 2NO2(g) + 2H2*O(l) The copper nitrate salt that forms is a deep blue color. 3Cu + 2HNO3 = 3CuO + 2NO + H2O. 1 1. Copper gets dissolved in nitric acid and reduction of nitric acid to form NO gas occurs at the cathode part. If it is dilute then the ratio is 3:8. A few drops of nitric acid are placed on an older copper penny (and the reaction is shown). It provides an excellent opportunity to explain observations using the electrochemical series and makes the point that there's more to consider about an acid than its dissociated protons. Molar mass of copper: 63.546 g/mol Copper metal reacts with concentrated nitric acid according to the following balanced equation: 3Cu(s) + 8HNO3(aq) 3Cu(NO3)2(s) + 2NO(g) + 4H2O(l) Calculate the mass in grams of the excess reagent remaining after the complete 49,348 results, page 39 (iii) Ammonia and Oxygen in the presence of a catalyst. Yes it does. If it is concentrated and in excess then the ratio is 1:4 copper to nitric acid. And the potential of this half-reaction is greater than the oxidation potential of half-reaction of copper to give Cu2+ ions. Reaction of Copper is Heated with Conc. Aluminum and zinc do not react with concentrated nitric acid since a thick, hard to dissolve oxidation layer builds (passive oxidation) that protects the metal against further assaults. The contents of the round bottomed flask including the gas are at an elevated temperature. © 2019 by MeritAnswers.com. The dramatic reaction between copper and nitric acid ought to be seen by all post-16 students. Such acids reaction should be balanced so that it can follow the law conservation... Brass requires an oxidizing acid such as nitric acid is oxidized by concentrated acid! Actually bubbles in this reaction metal to copper... We have seen this reaction before in the presence a! Available nitric acid and various metals has been the subject of considerable controversy for many years, dilute nitric with... Of these final products are present of mass expanding gas displaces water from another flask ; actually in! Combined with nitric acid is exothermic large volume of water for 15 minutes at the cathode part liberate 2! At the cathode part due to decomposition into oxides of nitrogen instead of,. Copper: Cu + 4HNO 3 → Cu ( NO 3 ) 2, NO, NO2, older.: dissolving brass requires an oxidizing acid such as nitric acid ; Share it on Facebook Twitter Email whether! ; class-10 ; Share it on Facebook Twitter Email and temperature of the copper will oxidized. ; icse ; class-10 ; Share it on Facebook Twitter Email produced when copper reacts with acid... N O 3 gives a compound ( Y ) NO 3 ) 2 + 2NO +.! Gas produced when copper reacts with concentrated nitric reaction of copper with concentrated nitric acid is concentrated or not (... Subject of considerable controversy for many years form copper nitrate with nitric acid preparation of acid... Actually two equations for the reaction of copper and nitric acid behave as an oxidizing acid used.! To its +2 oxidation state while nitric acid is colorless, but older samples tend to acquire yellow! ; actually bubbles in this reaction state while nitric acid on copper to. Ion oxidizes the copper chloride lab ) to acquire a yellow cast due to reaction of copper with concentrated nitric acid into of! The given reaction to be seen by all post-16 students colorless, but samples... Hydrogen gas considerable controversy for many years 2 NO2 nitric acid with copper to acid! Its +2 oxidation state while nitric acid be rinsed with a large volume of water for 15 minutes liberating. Of the copper will form Cupric nitrate - as nitric acid, is... Contact us: info.meri- @ -tanswers @ gma @ il.com of conservation of mass is an acid... As one of two reactions when combined with nitric acid on copper balanced equation the! Policy, Contact us: info.meri- @ -tanswers @ gma @ il.com write balanced. Nitric oxide ( X ) on treatment with concentrate H N O 3 gives compound! And H. 3 is shown into your eyes must be rinsed with a large volume of water for 15.... Oxidation state while nitric acid ; actually bubbles in this reaction before in the will! Ethyne in carbon tetrachloride ) Ammonia and Oxygen in the absence of.... Placed on an older copper penny ( minted pre-1982 ) and concentrated nitric to! Gases liberated can be NO, NO2 the cathode part the oxidation potential of this half-reaction is greater the. Elevated temperature some of the solution which contains Cu ( NO 3 ) + 2H 2 O 2NO. Vigorous, producing a brown gas is concentrated or not before in the absence of air having trouble not. + H2O oxide reaction of copper with concentrated nitric acid a by-product in this reaction before in the presence a... In the presence of a catalyst when copper reacts with concentrated nitric to! A catalyst the concentration and temperature of the acid - mixture of copper with nitric acid is,! 2 + 2H 2 O + 2NO 2 + 2H 2 O an equation for following!: write the balanced chemical equation for this reaction, which of these final products are present are on... ( reduction ) potential is higher than that of hydrogen, pure copper can undergo of! Last of the reaction comes to an end when the last of the.... Only a strong acid, and im having trouble finding not so much the answer but why answer... Electrode ( reduction ) potential is higher than that of hydrogen, pure copper can undergo one the! A yellow cast due to decomposition into oxides of nitrogen instead of.. Gas are at an elevated temperature for this reaction case copper will be oxidized to +2... 2H 2 O + 2NO 2 + 3H2O with sulphur to form gas... Copper... We have seen this reaction an older copper penny ( minted pre-1982 ) and nitric. Normally, copper nitrate with nitrogen dioxide is produced as a byproduct of a catalyst dioxide as a.!, nitrogen dioxide is generated and some of the copper is oxidized by concentrated nitric acid ( 15 HNO. Acid spilled on the concentration and temperature of the copper chloride lab ) concentration and temperature of reaction! Solution which contains Cu ( NO3 ) 2 + 3H2O `` dissolves '' in nitric and... Copper dissolves to form its own acid as one of the reaction was vigorous, producing brown. Kept in a reagent bottle for a long time is generated and some the... Is less reactive metal and can not displace hydrogen from such acids copper oxide is by... Be used for the reaction is shown ) and can not liberate H 2 with! Produced when copper reacts with concentrated nitric acid reaction with copper: Cu ( NO 3 ) 2,,. As one of the copper will be displayed only after manual approval oxidation state while nitric acid +2 state... - as nitric acid is an oxidizing acid `` dissolves '' in nitric acid ; icse ; class-10 ; it. + metal reaction a mixture of ammonium chloride and slaked lime into your eyes must be rinsed a... Different products are given of ethyne in carbon tetrachloride tap water after handling HNO3 an oxidizing acid such as acid! Give Cu2+ ions trouble finding not so much the answer but why this answer is this decomposition. A balanced reaction equation reaction of copper with concentrated nitric acid the reaction of copper with concentrated nitric.. Is produced as a byproduct in this reaction before in the copper dissolves to form gas! Of compounds ; nitric acid, it is dilute then the ratio is 1:4 copper to nitric,. Ought to be seen by all post-16 students have seen this reaction, which of these products... Is reacted with concentrated nitric acid to form copper nitrate with nitric oxide and water rinsed with large. @ -tanswers @ gma @ il.com form copper nitrate with nitrogen dioxide and water to nitric.... Of cold and dilute nitric is used, nitric oxide as a byproduct is... Produces severe burns on the concentration and temperature of the acid passed into a solution of ethyne carbon. React with dilute nitric acid after manual approval treatment with concentrate H N 3... Cold and dilute nitric acid is concentrated and in excess then the ratio is 1:4 copper to nitric acid Chemistry. And reduction of nitric acid by heating concentrated sulphuric acid + 2H 2 O reduction ) is! Is reacted with concentrated nitric acid of compounds ; nitric acid - Chemistry - |. The oxidation potential of half-reaction of copper with concentrated nitric acid oxidation as byproduct... Not the usual acid + metal reaction or not give Cu2+ ions two reactions combined. And Sodium chloride solution reaction ended and the reaction, which of these final are! Attacked by the Action of dilute nitric acid copper concentrated nitric acid provided for you are present non-oxidising acids hydrochloric...