0.5 g of fuming H2SO4 (oleum) is diluted with water. This solution is completely neutralised by 26.7 mL of 0.4 N NaOH. Find the percentage of free SO3 in the sample solution.
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... with water. This solution is completely neutralised by 26.7 mL of 0.4 N NaOH . Find the percentage of free SO3 in the sample solution.
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