Question

A solution is prepared by dissolving 90 mL of hydrogen peroxide in enough water to make 3000 mL of solution. Identify the concentration of the hydrogen peroxide solution.

Answer 1

Given:

A solution is prepared by dissolving 90 mL of hydrogen peroxide in enough water to make 3000 mL of solution.

To find:

Identify the concentration of the hydrogen peroxide solution.

Solution:

We use the formula, Volume percent = Volume of solute / Volume of solution × 100 %

From given, we have the parameters,  

The volume of solute is 90 mL

The volume of solution is 3000 mL

Substitute the values in the given formula,

Volume percent = Volume of solute / Volume of solution × 100 %

= 90 mL / 3000mL × 100 %

∴ The volume percent = 3 %

Answer 2

Explanation:

Determine the volume/volume percent solution made by combining 25 mL of ethanol with enough water to produce 200 mL of the solution.