Question

You wish to make a 0.252 M hydrochloric acid solution from a stock solution of 3.00 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 100mL of the dilute solution?

_______mL

Answer 1

Answer:

V₁ = 8.4 mL

Explanation:

In case of dilution , the following formula can be used -

M₁V₁ = M₂V₂

where ,  

M₁ = initial concentration ,  

V₁ = initial volume ,

M₂ = final concentration , i.e. , concentration after dilution ,  

V₂ = final volume , ( volume for dilution )

from , the question ,  

M₁ = 3.00 M

V₁ = ?

M₂ = 0.252 M

V₂ = 100mL

Using the above formula , the molarity of the stock solution , can be calculated as ,  

M₁V₁ = M₂V₂

3.00 M * V₁  = 0.252 M *  100mL

V₁ = 0.252 M *  100mL  / 3.00 M

V₁ = 8.4 mL