Strontium is a Group 2 alkaline earth metal located below calcium in the periodic table.
When a clean piece of strontium metal is added to a beaker of cold water, a vigorous chemical reaction occurs to produce strontium hydroxide, Sr(OH)2\text{Sr(OH)}_2Sr(OH)2, and a gas.
Sr(s)+2H2O(l)→Sr(OH)2(aq/s)+H2(g) \text{Sr(s)} + 2\text{H}_2\text{O(l)} \rightarrow \text{Sr(OH)}_2\text{(aq/s)} + \text{H}_2\text{(g)} Sr(s)+2H2O(l)→Sr(OH)2(aq/s)+H2(g)Describe two visual observations, other than the metal sinking, that would be made during this reaction.
110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.