Question

Question 2 The colour change observed when the solution of magnesium hydroxide is tested with the following indicators: 1. phenolphthalein turns colourless to pink 2 methyl orange remains orange 3 phenolphthalein remains colourless 4. blue litmus solution turns red ​

Answer 1

Answer:

1. is correct as hydroxide is a base it would give phenopthalin magenta/pink colour

Explanation:

1. is correct as hydroxide is a base it would give phenopthalin magenta/pink colour

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Answer 2

The colour change observed when the solution of magnesium hydroxide is tested with the following indicators is phenolphthalein turns colourless to pink.

What is phenolphthalein?

• In an acid-base titration, phenolphthalein is employed as an indicator. It turns pink in alkaline solutions and is colourless in acid solutions as an indicator.
• For experiments, it is dissolved in alcohol and is just marginally soluble in water.

What happens when phenolphthalein is tested with magnesium hydroxide?

• Magnesium hydroxide is a basic metal oxide. Since magnesium hydroxide solution is alkaline so, it turns phenolphthalein to pink.

Hence, we can conclude that when phenolphthalein is tested with alkaline magnesium hydroxide it turns colourless to pink.