Mixed 200 g of a solution with a mass fraction of calcium chloride 25% and 400 g of a solution with a mass fraction of 50%. Calculate the mass fraction of calcium chloride in the resulting solution.
The weight of the resulting solution will be equal to the sum of the masses of the two initial solutions.
M = 200 + 400 = 600 grams;
The mass of salt in the first solution is 200 x 0.25 = 50 grams;
The mass of salt in the second solution is 400 x 0.5 = 200 grams;
The mass of salt in the resulting solution will be 50 + 200 = 250 grams;
The salt concentration in the new solution will be 250/600 = 0.417 = 41.7%;
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