Name one further greenhouse gas.
State one environmental issue that could result from an increase in the percentage of carbon dioxide in the air.
Draw the dot-and-cross diagram to represent bonding in a molecule of carbon dioxide. Show only the outer-shell electrons.
Some power stations burn methane, $\text{CH}_4$. Write the equation for the complete combustion of methane.
The carbon dioxide made in power stations can be removed by a reversible reaction with water, $\text{CO}_2(g) + \text{H}_2\text{O}(l) \rightleftharpoons \text{H}_2\text{CO}_3(aq)$. The forward reaction is exothermic. The concentration of carbon dioxide is increased. The temperature is kept constant. Predict and explain how the position of equilibrium changes.
The water temperature is raised. All other conditions are kept constant. Predict and explain how the position of equilibrium changes.
Carbonic acid, $\text{H}_2\text{CO}_3(aq)$, is a weak acid. What is meant by the term weak in weak acid?
Carbonic acid contains a small concentration of carbonate ions, $\text{CO}_3^{2-}(aq)$. If carbonic acid is pumped deep underground, the $\text{CO}_3^{2-}(aq)$ will react with metal ions to form insoluble carbonates. Write the ionic equation for the reaction of magnesium ions with $\text{CO}_3^{2-}(aq)$.