5g of NaOH are dissolved in 500 ml water. Find the molarity of the solution.
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Solution
The molecular weight of NaOH is 40 g/mol. The number of moles of NaOH5 g40 g/mol=0.125 moles. 500 ml water corresponds to0.500 L. The molarity of the solution =0.125 moles0.500 L=0.25 M