The percentage by mass of the solution formed when 22.0 grams of HCl is dissolved in 90.0 grams of water is 19.6%.
How do we calculate the percent mass?
Percent by mass of any substance present in any solution will be calculated as:
% mass = (mass of substance / Total mass of solution) × 100%
Given that, mass of HCl = 22g (solute)
mass of water = 90 g (solvent)
mass of solution = 22 + 90 = 112 g
On putting values we get,
% mass = (22 / 112)×100% = 19.6%
Hence required percentage mass is 19.6%.
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