Name one more naturally occurring substance in water that is neither a mineral salt nor a pollutant.
Lithium reacts with water to give aqueous lithium hydroxide, $\text{LiOH}$, and hydrogen. Write the equation for this reaction.
Explain, using their electronic configurations, why lithium, sodium and potassium show similar reactivity.
Describe the trend in reactivity for the Group I elements lithium, sodium and potassium.
Water and oxygen are made when aqueous hydrogen peroxide breaks down. $2\text{H}_2\text{O}_2(\text{aq}) \rightarrow 2\text{H}_2\text{O}(\ell) + \text{O}_2(\text{g})$ Calculate the greatest volume of oxygen, at room temperature and pressure, produced by complete decomposition of a solution containing 16.0 g of hydrogen peroxide. Give your answer to three significant figures.
Name one process used industrially to make hydrogen.
Describe two advantages that a hydrogen-oxygen fuel cell has over a petrol (gasoline) engine.