In the experiment, 0.57 g sample of these crystals dissolved in 25.0 cm3 of distilled water and subsequently titrated with dilute hydrochloric acid. 19.95 cm3 of 0.20 mol/dm3 of dilute hydrochloric acid was required for the titration.
(a) Calculate the number of moles of Na2CO3.xH2O which reacted with the dilute hydrochloric acid.
Answer: 0.001995 moles
(b) Find x and determine the formula of hydrated sodium carbonate.
Answer: 10
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