ACTIVITY 1. PERCENTAGE BY MASS Instruction: Read and analyze the problem write your answer in the answer sheet with solution.
1.What is the concentration of a solution made by dissolving 4.45 g of sugar in 8.55 g of water
2.Find the concentration of a solution made by dissolving 3.25 g of salt in 6.50 6 of salt solution
3. Calculate the percentage by mass of the following given: solute = 1.25 g of sugar, solution = 2.45 g of sugar solution
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Answer:
1.34.23%
2.50%
3.51.02%
Explanation:
1. 4.45/8.55x100=52.05%
4.45x100=445/13=34.23%
2. 3.25x100=325/6.50=50%
3. 1.25x100=125/2.45=51.02%