Question

If 33.6 grams of kcl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass? 21.2% kcl 17.5% kcl 14.9% kcl 5.71% kcl

Answer 1

Answer:

Concentration in % by mass = 14.9% KCl

Explanation:

Given:

Mass of KCl = 33.6 g

Mass of water = 192 g

To determine:

%w/w of KCl solution

Explanation:

Concentration can be expressed in terms of %w/w which refers to the amount of solute in the total mass of the solution (solute + solvent). This is expressed as:

$%w/w = \frac{Mass\ of\ Solute}{Mass\ of \ solute + solvent} *100$

For KCl solution

Solute = 33.6 g KCl

Solute + solvent = 33.6 g KCl + 192 g water = 225.6 g

$%w/w = \frac{33.6}{33.6+192} *100 = 14.9%$

Answer 2

Ms ( mass of solute): 33,6g
mss (mass of solution): 33,6+192g = 225,6g
__________________
C = ms/mss × 100%
C = 33.6/225.6 × 100%
C = 14,89% ≈ 14,9%

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