What is the percent by volume of ethanol in a solution that contains 26 mL of ethanol dissolved in 113 mL of water?
explain please
% v/v = (mL solute/mL solution)*100
% v/v = [26/(26+113)]*100 = ? or
(26/139)*100 = ?
To find the percent by volume of ethanol in the solution, we need to compare the volume of ethanol to the total volume of the solution and express it as a percentage.
To solve this, follow these steps:
Step 1: Add the volume of ethanol (26 mL) and the volume of water (113 mL) together to get the total volume of the solution:
Total volume = Volume of ethanol + Volume of water
Total volume = 26 mL + 113 mL
Total volume = 139 mL
Step 2: Calculate the percentage by dividing the volume of ethanol by the total volume and multiplying by 100:
% by volume of ethanol = (Volume of ethanol / Total volume) x 100
% by volume of ethanol = (26 mL / 139 mL) x 100
% by volume of ethanol ≈ 18.71%
Therefore, the percent by volume of ethanol in the solution is approximately 18.71%.