Given: - 4.0% by mass of ammonium chloride - 1.75kg of the solution An aqueous solution...

SOLUTION:

For a Binary solution(a solution containing two components),

% of Mass =(Mass of solute /Mass of solvent) *100

Here ,

NH₄Cl is solute & water is solvent .

Simply 4% by mass means the solution contains 4% NH₄Cl of its total mass .Rest will be the mass of water.

Now ,

Given mass of solution =1.75 kg

Then , Mass of NH₄Cl = 4% of 1.75 kg

= (1.75*4)/100

=0.07 kg

Now ,Mass of water required =1.75 ^_ 0.07

=1.68 kg

So, Mass of NH₄Cl required =0.07 kg

Mass of water required =1.68 kg