Solution Stoichemetry Question Examples

A beaker contains 100mL or 1.5M HCl. Excess zinc is added to the beaker. Determine how many litres@STP of hydrogen gas should be produced.


2HCl + Zn --> ZnCl2 + H2

1.5mol x 0.100L x 1 x 22.4L = 1.7L
     L                       2     mol

Determine the number of mles of H2O produced when 0.250L of 0.100M NaOH is neutralized by H2SO4.


2NaOH +H2SO4 --> Na2SO4 + 2H2O


0.100mol x 0.250L x 2 = 0.025mol
      L                          2





Janine R