A group 1 metal oxide dissolves in water to form a colourless alkaline solution. How can you confirm this?

To confirm that a Group 1 metal oxide dissolves in water to form a colourless alkaline solution, you can follow these steps:

1. Dissolve the metal oxide in water: Take a small amount of the metal oxide and add it to a beaker of water. Stir the solution until the metal oxide is completely dissolved.

2. Observe the solution: The solution should be colourless if the metal oxide has dissolved completely.

3. Test the pH of the solution: Use a pH indicator, such as litmus paper or a pH meter, to test the pH of the solution. Alkaline solutions have a pH greater than 7. If the solution is alkaline, the litmus paper will turn blue.

4. Perform a further test with universal indicator: To confirm the alkalinity, you can also use a universal indicator, which will turn green-blue or purple in an alkaline solution.

5. Compare the results: If the solution is colourless and the pH is greater than 7, then it can be confirmed that the Group 1 metal oxide has dissolved in water to form a colourless alkaline solution.