Answer to Question #184636 in Chemistry for Angela Tariga

Question

How many litersof 10M HCl are needed to make 4L of 0.4M solution

Answer 1

M₁ = 10 M

V₁ = unknown

M₂ = 0.4 M

V₂ = 4 L

Solution:

(Initial concentration) × (Initial Volume) = (Final concentration) × (Final Volume)

M₁V₁ = M₂V₂

Divide to isolate V₁:

V₁ = (M₂V₂) / (M₁)

Plug in the numbers and solve for V₁:

V₁ = (0.4 M × 4 L) / (10 M) = 0.16 L (160 mL)

V₁ = 0.16 L

Answer: 0.16 liters of 10 M HCl are needed to make 4 L of 0.4 M solution.