A teacher adds a small piece of sodium to a large trough of water. A few drops of universal indicator have been added to the water.
Give two observations the teacher's class would see when the sodium is added to the water.
Complete the word equation for the reaction: sodium + water →\rightarrow→ ...... + hydrogen
Describe the test for hydrogen gas. Give the result of the test.
State the colour of the universal indicator in the water after the reaction. Give a reason for your answer.
Sodium is stored under oil. Explain why.
41 exam-style questions on Edexcel GCSE Chemistry 7.1 Group 1, covering 7.1.1 Classifying elements by group in the periodic table and 7.1.2 Properties and reactions of the alkali metals. Each one has a worked solution and a mark scheme showing where the marks go.