Another product of the corrosion of bronze is basic copper(II) carbonate, xCu(OH)₂.yCuCO₃. It is heated in the apparatus shown: CuCO₃ → CuO + CO₂ and Cu(OH)₂ → CuO + H₂O. When a certain mass is heated, 5.28 g of carbon dioxide and 1.08 g of water are formed.

1. aExplain why aqueous sodium hydroxide reacts with carbon dioxide. [3]
2. bName the products formed when aqueous sodium hydroxide reacts with carbon dioxide. [2]
3. cState the mass of 1 mole of carbon dioxide, and calculate the number of moles of carbon dioxide formed. [3]
4. dState the mass of one mole of water, and calculate the number of moles of water formed. [2]
5. eUse the number of moles of water and carbon dioxide to calculate the values of x and y, and write the formula of basic copper(II) carbonate. [3]

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