A small amount of solid magnesium oxide (MgO) reacts with excess dilute hydrochloric acid.
1. Write a balanced equation for this reaction (1 mark)
A small amount of solid magnesium oxide (MgO) reacts with excess dilute hydrochloric acid.
2. Describe what would be seen as the reaction occurs (1 mark)
HCl is a strong acid. What is meant by the term acid(1 mark)
4. Now complete the following word equations for reactions between some acids and some bases.
1) iron + hydrochloric acid → 2) hydrochloric acid + copper carbonate → 3) iron(II) hydroxide + sulfuric acid → 4) nitric acid + calcium oxide →
5. Nitric acid is a strong acid. Citric acid is a weak acid. What is the difference between strong and weak acids? (3)
6. This question is about the reactions of calcium and some calcium compounds. (a) Calcium reacts with cold water. The equation for the reaction is
Ca(s) + 2H2O(l) => Ca(OH)2 (aq) + H2 (g)
(i)State two observations that are made when calcium reacts with water (2)
(ii)Explain a possible value for the pH of the solution formed. (2)