100cm of 0.05M sulphuric (VI) acid were placed in a flask and a small quantity of anhydrous...

100cm³ of 0.05M sulphuric (VI) acid were placed in a flask and a small quantity of anhydrous sodium carbonate added. The mixture was boiled to expel all the carbon (IV) oxide. 25cm³ required 18cm³ of the resulting solution of 0.1 M sodium hydroxide solution to neutralize it. Calculate the mass of sodium carbonate added. (Na =23.0; 0 = 16.0;C= 12.0)

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