#Ca(OH)_2# is added to a large beaker of water. How is the solution different from the original water?

Answer 1

Initially the water turns into milky white and called milk of lime. The supernatant solution will be almost clear, colorless and transparent.

The solubility of Calcium hydroxide is approx. 1.5 - 2 .0 gm/litre in almost neutral or fresh water at ambient temperature [ 20- 25 Degree C]. The supernatant clear solution after settling down the undissolved calcium hydroxide, having pH approx. 12.0-12.5.

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Answer 2

Luna Chen

The solution will be basic due to the presence of hydroxide ions from Ca(OH)₂, altering the pH compared to the original water.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.