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Reaction of Quick Lime with Water

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Lab Report

Aim

To observe the combination reaction of calcium oxide (quick lime) with water.

Materials Required

Calcium oxide (Quick lime)
Beaker
Water
Thermometer
Glass stirrer

Theory

Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide), releasing a large amount of heat. This is an example of an exothermic combination reaction.

Chemical Equation:
CaO (s) + H₂O (l) → Ca(OH)₂ (aq) + Heat

The solution formed is alkaline in nature (basic) and turns red litmus paper blue.

Procedure

  1. Take a small amount of calcium oxide or quick lime in a beaker.
  2. Slowly add water to this.
  3. Touch the beaker or use a thermometer to observe the temperature change.
  4. Observe the vigorous bubbling and hissing sound as slaked lime is formed.
  5. Let the mixture settle and test the clear solution with red litmus paper.
Temperature: 25°C
Status: Ready

Observation Table

S.No. Action Observation

📹 Experiment Video

Knowledge Check

1. The reaction between quick lime and water is an example of:

2. What happens to the temperature of the beaker during the reaction?

3. The common name of Calcium Hydroxide is:

4. What is the nature of the solution formed?

5. Reactions in which heat is given out along with products are called:

Lab Report Summary

Experiment: Reaction of Quick Lime with Water

Aim: To observe the combination reaction of calcium oxide with water.

Result:

Calcium oxide reacts vigorously with water to produce slaked lime (Ca(OH)₂), releasing a large amount of heat. It is an exothermic combination reaction.