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An antacid tablet contains 0.1 g of magnesium hydrogencarbonate, Mg(HCO3)2. What mass of stomach acid, HCl, will it neutralise? The reaction between Mg(HCO3)2 and HCl is: Mg(HCO3)2 + 2HCl → MgCl2 + 2CO2 + H2O

a)Work out, from the molar mass, the amount of Mg(HCO3)2 in 0.1g.

b)Find (i) the amount of HCl (ii)the mass of HCl which it can neutralise.

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