Question

setarakan persamaan reaksi dari Cu(s) +HNO3(aq)~Cu(NO3)2(aq)+NO(g)+H2. beserta dengan cara penyelesaiannya. mohon bantuannya​

Answer 1

A Cu + b HNO3 -> c CU(NO3)2 + d NO + e H2O

Cu -> a = c

H -> b = 2e

N -> b = 2c + d

O -> 3b = 6c + d + e

misal a = 3

c = 3

b = 2c + d

b = 6 + d

3b = 6c + d + e

3b = 18 + d + e

b = 6 + d/3 + e/3

b = b

6 + d = 6 + d/3 + e/3

2/3 d = e/3

2d = e

b = 2e

b = 4d

b=b

6 + d = 4d

3d = 6

d = 2

b = 6 + d

b = 6 + 2

b = 8

b = 2e

8 = 2e

e = 4

3Cu + 8 HNO3 -> 3Cu(NO3)2 + 2 NO + 4H2O

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Answer 2

Cu(s) +HNO3(aq)~Cu(NO3)2(aq)+NO(g)+H2 -> 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O