II. Problem Solving Directions: Read and analyze the situations below. Answer and solve what is asked in each problem using the given formulas. Use the back of this bond paper for your solutions. *Note: No solution, No point. volume of solute Percent by volume = X 100 volume of solution Percent by mass = mass of solute mass of solution x 100
1. The active ingredient in wines and other alcoholic beverages is ethanol. A 300mL sample of wine was found to contain 37.5mLof ethanol. What is the percentage by volume concentration of ethanol in the wine sample?
2. What is the percent by volume of a solution formed by mixing 25mL of isopropanol with 45mL water?
3. If I make a solution by adding water to 75mL of ethanol until the total volume of the solution is 375mL, what is the percent by volume of ethanol in the solution?
4. What is the percent by mass concentration of a solution that contains
5.30g of salt dissolved in 19.7g of water?
5. How many grams of glucose (C6H1206) are needed to prepare 400mL of a 5% glucose solution?
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