How do I do this? HINTS ONLY PLEASE! Balance the following reaction equations. 4

Question

How do I do this? HINTS ONLY PLEASE! Balance the following reaction equations. 4 HNO3(aq) + 1 Cu(s) rightarrow 2 H2O(l) + 1 Cu(NO3)2(aq) + 2 NO2(g) You are correct. Computer's answer now shown above. Your receipt is 157-3378 Previous Tries Balance the Net Ionic equation for this reaction. (No species should appear on both sides of a properly balanced reaction equation. Therefore some coeffcient must be "0".)

Explanation / Answer

This equation can be balanced by considering that as a redoxreaction in aquis acid medium. ion - electron method or half reaction mathod is adoptable andsuitable. Cu(s) +H+ (aq) +NO3-(aq) ----->NO2(g) + NO-3(aq)+H2O(l) +Cu2+(aq) Cu(s) -----> Cu2+(aq)      NO3-(aq) ----->NO2(g) Cu(s) ----->Cu2+(aq)+2e-          NO3-(aq) -----> NO2(g) +H2O                                               NO3-(aq)+ 2H+ ----->NO2(g) + H2O Cu(s) ----->Cu2+(aq)+2e-          2[NO3-(aq)+ 2H+ ----->NO2(g) + H2O+e- ]                                               2 NO3-(aq)+ 4H++2e------> 2NO2(g) +2 H2O BY COMBINING BOTH EQUATIONS Cu(s)+2 NO3-(aq)+4H++2e- ------>2NO2(g) +2H2O+Cu2+(aq)+2e- Cu(s)+2 NO3-(aq)+ 4H+ ------>2NO2(g) +2H2O+Cu2+(aq) NOW U CAN

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