What is the volume percent of ethanol in a solution made by mixing 30 mL of etha
Practice Questions
Q1
What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?
30%
70%
50%
20%
Questions & Step-by-Step Solutions
What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?
Correct Answer: 30%
Step 1: Identify the volume of ethanol (solute) in the solution. In this case, it is 30 mL.
Step 2: Identify the volume of water (solvent) in the solution. In this case, it is 70 mL.
Step 3: Calculate the total volume of the solution by adding the volume of ethanol and the volume of water together. Total volume = 30 mL + 70 mL = 100 mL.
Step 4: Use the formula for volume percent, which is (volume of solute / total volume) × 100.
Step 5: Plug in the values: (30 mL / 100 mL) × 100.
