What volume of a  0.100mhcl0.100mhcl  stock solution should be used to prepare  250.00ml250.00ml  of  0.0250mhcl0.0250mhcl?

62.5 mL

Explanation:

We are given;

Molarity of the stock solution as 0.100 MVolume of the dilute solution as 250 mLMolarity of dilute solution as 0.0250 M

We are required to calculate the Volume of the stalk solution.

Taking the volume and molarity of the stock solution to be V₁ and M₁ respectively, and volume and molarity of the dilute solution to be V₂ and M₂ respectively.

We are going to use the dilution formula;

According to the dilution formula, M₁V₁ = M₂V₂Rearranging the formula;

V₁ = M₂V₂ ÷ M₁

    = (0.025 M × 0.25 L) ÷ 0.100 M

    = 0.0625 L

But, 1 L = 1000 mL

V₁ = 62.5 mL

Therefore, the volume of the stock solution is 62.5 mL

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