Question:1 There are six equations given in the experimental procedure. Balance

Question

Question:1

There are six equations given in the experimental procedure. Balance these equations below and transfer your results to the appropriate place in the experimental procedure. (Hint: The coefficient on HNO3 in reaction one is 4.)

(1)   Cu(s) +      HNO3(aq)         Cu(NO3)2(aq) +      NO2(g) +      H2O(l)

(2)   Cu(NO3)2(aq) +      NaOH(aq)       Cu(OH)2(s)   +      NaNO3(aq)

(3)   Cu(OH)2(s)   + heat         CuO(s) +      H2O(l)

(4)   CuO(s) +      H2SO4(aq)       CuSO4(aq) +      H2O(l)

(5)   CuSO4(aq) +      Al(s)       Al2(SO4)3(aq)   +      Cu(s)

(6)   Al(s) +      HCl(aq)       H2(g) +      AlCl3(aq)

Explanation / Answer

1. Cu (s) + 4HNO3 (aq) ----> Cu(NO3)2 (aq) + 2NO2 (g) + 2H2O (l)

2. Cu(NO3)2(aq) + 2NaOH(aq)    -----> Cu(OH)2(s) + 2NaNO3(aq)

3.   Cu(OH)2(s) + heat -- --> CuO(s) + H2O(l)

4. CuO(s) + H2SO4(aq)   ­--> CuSO4(aq) + H2O(l)

5. 2 Al(s)+3 CuSO4(aq)--> Al2(SO4)3(aq)+ 3 Cu(s)

6. 2Al(s)+6HCl(aq) ----> 3H2(g) +2AlCl3(aq)

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