In a solution weighing 200 g with a mass fraction of calcium chloride 12% was added and 20 g of calcium chloride (Cl2Ca)
| February 8, 2021 | education
In a solution weighing 200 g with a mass fraction of calcium chloride 12% was added and 20 g of calcium chloride (Cl2Ca) was dissolved, determine the mass fraction of calcium chloride in this solution.
Find the mass of salt in the first solution
200 grams * 12 percent / 100 percent = 200 grams * 12/100 = 2 * 100 * 12/100 = 2 * 1 * 12/1 gram = 2 * 12 grams = 24 grams
find a new mass of matter
24 grams + 20 grams = 44 grams
find the mass of the solution
200 grams + 20 grams = 220 grams
find the mass part
44 grams / 220 grams * 100 percent = 44/220 * 100 percent 44 / (22 * 10) * (10 * 10) percent = 44/22 * 10 percent = 22 * 2/22 * 10 percent = 2 * 10 percent = 20 percent
answer: 20 percent
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