A student investigates the highly exothermic reaction between solid sodium metal and liquid water, which produces a solution of sodium hydroxide and hydrogen gas. The reaction is represented by the following balanced chemical equation:
2Na(s)+2H2O(l)→2NaOH(aq)+H2(g) 2\text{Na(s)} + 2\text{H}_2\text{O(l)} \rightarrow 2\text{NaOH(aq)} + \text{H}_2\text{(g)} 2Na(s)+2H2O(l)→2NaOH(aq)+H2(g)What do the state symbols (l)\text{(l)}(l) and (aq)\text{(aq)}(aq) represent in this equation?
(l)\text{(l)}(l) represents an aqueous solution, and (aq)\text{(aq)}(aq) represents a pure liquid.
(l)\text{(l)}(l) represents a pure liquid, and (aq)\text{(aq)}(aq) represents an acid.
(l)\text{(l)}(l) represents a pure liquid, and (aq)\text{(aq)}(aq) represents a substance dissolved in water (aqueous).
(l)\text{(l)}(l) represents a liquefied gas, and (aq)\text{(aq)}(aq) represents an alkaline precipitate.
55 exam-style questions on OCR GCSE Chemistry Introducing chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.