10.0 dm³ of water was added to 2.0 mol dm^-3 of 2.5dm³ solution of HCl. What is the concentration of the final solution in mol dm^-3?

A.

0.4

B.

8.0

C.

2.0

D.

0.5

View answer & explanation

Correct answer is A

C₁V₁ = C₂V₂

C₂ = \(\frac{C_1V_1}{V_2}\)

= \(\frac{2.0 \times 2.5}{12.5}\)

= 0.4mol/dm^-3

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