Question

Write the steps to produce a transparent and good quality ice.

Hint:

Cloudy ice comes from trapped air and impurities. Use clean water, slow freezing and agitation.

Answer 1

Step 1: Why ice turns cloudy:
Ordinary ice is white and cloudy because air bubbles and dissolved impurities get trapped as the water freezes.
Transparent ice needs clean water and a way to remove the air.

Step 2: Steps to produce clear ice:
1. Take clean water and purify it. It can be boiled or distilled and filtered to remove dissolved air, salts and dirt.
2. Fill the water in ice cans and place the cans in a cold brine tank, so that the water freezes slowly from the outside to the centre.
3. Stir the water in the cans with a gentle air supply or agitator during freezing. This lets the trapped air escape and keeps the ice clear.
4. Remove the impure water left in the core near the end, and refill the core with clean water to freeze.
5. When the block is frozen, dip the cans in warm water for a short time and take out the ice block.

Final Answer:
Clear ice is made by using purified water, freezing it slowly in brine, agitating it to remove air, and replacing the impure core water.