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Physics, 07.09.2021 17:20 esanchez2002fcb

1.2 g of marble containing sand as the only impurity is dissolved in 50 em' of HCl of concentration I mol. dm! The excess acid is neutralised by exactly 27.5 cm of a (10) solution of sodium hydroxide of concentration 1 mol. dm. Calculate the percentage CaCO, in the impure marble.

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