Calcium hydroxide dissolves in water to make limewater. If carbon dioxide is bubbled through limewater, a white precipitate of calcium carbonate appears. Write the equation for this reaction.
Calcium hydroxide is used to neutralise acidic soils. Explain, using an ionic equation, why calcium hydroxide is able to neutralise acidic soils.
A farmer applies ammonium nitrate as a fertiliser to an acidic soil. He then adds calcium hydroxide to neutralise the acidic soil. Explain one disadvantage of using calcium hydroxide to neutralise this acidic soil.
The farmer uses a different fertiliser. This fertiliser has the following percentage composition by mass: Ca, 17.1%; H, 1.7%; P, 26.5%; O, 54.7%. Calculate the empirical formula of this compound and suggest the formula of the anion present in the fertiliser.