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29/09/2020 8:38 pm
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A solution is prepared by dissolving 24.5 g of sodium hydroxide in distilled water to give 1 L solution. The molarity of NaOH in the solution is
(a) 0.2450 M
(b) 0.6125 M
(c) 0.9800 M
(d) 1.6326 M
(Given that molar mass of NaOH = 40.0 g mol–1)
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29/09/2020 8:42 pm
(b) 0.6125 M
Explanation:
Given WNaOH = 24.5 g
No. of moles of NaOH = 24.5/40 moles
= 0.6125 moles
Molarity of solution = 0.6125 moles/1L = 0.6125 M