Answer to Question #329692 in Chemistry for rae

Question

A student needs to prepare 50.0 mL

50.0 mL of a 0.90 M

0.90 M aqueous H2O2 solution. Calculate the volume of 4.6 M H2O2

stock solution that should be used to prepare the solution.

Answer 1

Solution:

The equation for dilution calculations can be used

where:

c₁, V₁ - the molarity and volume of the concentrated solution

c₂, V₂ - the molarity and volume of the diluted solution

 

Thus:

(4.6 M) × V₁ = (0.90 M) × (50.0 mL)

V₁ = (0.90 M × 50.0 mL) / (4.6 M) = 9.78 mL

V₁ = 9.78 mL

Answer: 9.78 mL of H₂O₂ stock solution should be used