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
Correct Answer: Option A
Explanation
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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