What mass of calcium chloride and water is required to prepare a solution of 500 g with a mass fraction of a solute of 10%.
The weight of the solution is 500 grams;
To find the weight of the dissolved salt, it is necessary to multiply its mass fraction by the weight of the existing solution.
m salt = 500 x 0.1 = 50 grams;
To determine the weight of water, it is necessary to subtract the weight of the dissolved salt from the weight of the initial solution:
m of water = 500 – 50 = 450 grams;
Check: 450 + 50 = 500;
The sum of the weights of the found components of the solution gives the weight of the solution specified by the condition.
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