Define acid.
The equation below shows what happens when the strong acid hydrochloric acid is mixed with water. $\text{HCl}(aq) \rightarrow \text{H}^+(aq) + \text{Cl}^-(aq)$ Complete the equation to show what happens when the weak acid ethanoic acid is mixed with water. $\text{CH}_3\text{COOH}(aq)$ ............
State two observations that would indicate hydrochloric acid is stronger than ethanoic acid.
State three additional conditions that must stay the same for a fair test.
Calculate the mass, in g, of magnesium carbonate required to react completely with $50.00\,\text{cm}^3$ of $2.00\,\text{mol dm}^{-3}$ hydrochloric acid by following the steps below.
Why does the student use excess magnesium carbonate?
Why is the residue rinsed?
Describe how the student would obtain pure magnesium chloride crystals from the filtrate.
What does the term precipitate mean?
Name a suitable silver salt for making silver chloride. Finish the chemical equation to show how insoluble silver chloride forms from aqueous barium chloride and the aqueous silver salt you have named. $\text{BaCl}_2 +$ ............ $\rightarrow$ ............ + ............