Question

1 g of a mixture of sodium chloride and sodium nitrate is dissolved in water. On adding silver nitrate solution, 1.435 g of AgCl is precipitated.

\[\ce{AgNO3_{( aq)} + NaCl_{( aq)}-> AgCl_{(s)} + NaNO3}\]

Calculate the precentage of NaCl in the mixture.

Answer 1

AgNO3	+	NaCl	→	AgCl	+	NaNO3
[108 + 14 + 48]		[23 + 35.5]		[108 + 35]5
[170 + 58.5]				143.5
228.5 g				143.5 g

To prepare 143.5 = 5 g of AgCl mixture needed = 228.5 g

To prepare 1.43 g of AgCl, mixture needed = `(228.5 xx 1.43)/143.5`

= `1/100` gram

∴ % of NaCl in `1/100` g mixture = `58.5 xx 1/100 xx 100`

= 58.5%