Question

Determine if HNO3 can dissolve each of the following metal samples.

1) Write a balanced chemical reaction showing how the 4.14 g Sn dissolves in HNO3.

2) Determine the minimum volume of 5.1 M HNO3 required to completely dissolve the sample.

Answer 1

1. Sn(s) +2 HNO3(aq) -----------> Sn(NO3)2(aq) + H2(g)

no of moles of Sn = W/G.A.Wt

                               = 4.14/118.7 = 0.035 moles

from balanced equation

1 mole of Sn react with 2 moles of HNO3

0.035 moles of Sn react with = 2*0.035/1   = 0.07 moles of HNO3

no of moles of HNO3 = molarity * volume in L

0.07                          = 5.1* volume in L

volume in L              = 0.07/5.1    = 0.0137 L = 13.7ml >>>answer