Sodium reacts vigorously with water to form sodium hydroxide and hydrogen gas:
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)A student adds a small, freshly-cut piece of sodium metal to a trough containing water and a few drops of phenolphthalein indicator.
Predict three observations the student would make during this reaction.
Practise Edexcel GCSE Chemistry Group 1 with exam-style questions for Foundation and Higher tier. 51 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
