ASSESSMENT 4 SOLVE THE FOLLOWING PROBLEMS. SHOW YOUR SOLUTION. 701 1. A 200ml, sample of wine was found to contain 38mL of ethanol What is the percentage by volume concentration of ethanol in the wine sample? 2. What is the percent by mass concentration of a solution that contains 5.50 g of salt dissolved in 158 8 of water? 3. What is the percent by mass concentration of a solution that contains 4 30g of salt dissolved in 19 g of a - 200 4. How many grams of glucose are needed to prepare 400mL of a 5% glucose solution? 5. If I make a solution by adding water to 65mL of ethanol until the total volume of the solution is 375ml, what is the percent by volume of ethanol in the solution? volonie volume 20 6. What is the percent by mass concentration of a solution that contains 7.50g of salt dissolved in 25g of water? 7. How many grams of glucose are needed to prepare 500mL of a 5% glucose solution? a 8. Try make a solution to 55mL of ethanol until the total volume of the solution is 165mL, what is the percent by volume of ethanol in the solution? 9. Rubbing alcohol is sold as a 70% (v/v) solution of isopropyl alcohol in water. What volume of isopropyl alcohol is used to make 250mL of rubbing alcohol? % Volume 350 ml 10. A bottle of hydrogen peroxide also known as agua oxigenada is labeled 5% (v/v). How many mL of agus oxigenada are in a 250ml bottle of this solution?
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