25 cm 3 of sulphuric acid of concentration 0.2 mol dm^ -3 are needed to exactly neutralize 40 cm 3 of

25 cm 3 of sulphuric acid of concentration 0.2 mol dm^ -3 are needed to exactly

neutralize 40 cm 3 of sodium hydroxide solution. What is the concentration of the
sodium hydroxide solution in mol dm ^-3 .


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