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25cm3 of a 0.2 mol dm3 solution of Na2CO3 requires 20 cm3 of a solution of HCl for ...

25cm3 of a 0.2 mol dm3 solution of Na2CO3 requires 20 cm3 of a solution of HCl for neutralization. The concentration of the HCl solution is

A. 0.5 mol dm3
B. 0.6 mol dm3
C. 0.2 mol dm3
D. 0.4 mol dm3




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