Question

Calculate the volume of 10 M HCl solution required to prepare 250 mL of a 5 M HCl solution
(a) 125 mL
(b) 450 mL
(c) 515 mL
(d)700 mL​

Answer 1

Answer:

Please find the attached answer below

Answer 2

To Find :

Volume of 10M HCl solution required to prepare 250mL of a 5M HCl solution.

Solution :

Name : Molarity

Symbol : M

Definition : Number of moles of solute dissolved in one litre (or one dm³) of solution.

Effect of temperature : Changes with change in temperature

Formula :

$\dag\:\underline{\boxed{\bf{\purple{M=\dfrac{Moles\:of\:solute}{Volume\:of\:solute\:in\:L}}}}}$

In this case, moles of solute remains constant so we can say that, M₁V₁ = M₂V₂

By substituting the values;

➠ M₁ × V₁ = M₂ × V₂

➠ 5 × 250 = 10 × V₂

➠ V₂ = 1250/10

➠ V₂ = 125mL

∴ (A) is the correct answer!