10 0 dm3 of water was added to 2 0 mol dm-3 of ... - JAMB Chemistry 2013 Question
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
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Correct Option: 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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