Question

If I have a 25%v/v solution of ethanol in water, how many ml of ethanol would be present in 350mL of the solution

O 14
O 1.400
O 87.5
O 0.875

Answer 1

In 350 mL of a 25% v/v ethanol solution, there would be 87.5 mL of ethanol. The correct answer is option c).

Step-by-step explanation:

If you have a 25% v/v solution of ethanol in water, the volume of ethanol present in 350 mL of the solution can be calculated by understanding that 25% v/v means there are 25 mL of ethanol in every 100 mL of solution. Therefore, to find out how many milliliters of ethanol are in 350 mL of this solution.

You'd multiply 350 mL by the percentage (0.25) because: Volume of ethanol = (Volume of solution) × (Percentage of ethanol / 100). Volume of ethanol = 350 mL × 0.25 = 87.5 mL. Thus, in 350 mL of a 25% v/v ethanol solution, there would be 87.5 mL of ethanol.

This concept is similar to the information given wherein a 40 mL ethanol in a 240 mL solution represents a 16.7% ethanol concentration. Whether we are dealing with medicines, food products, or laboratory solutions, understanding how to calculate the volume based on percentage concentrations is a fundamental skill in chemistry.