How carbon dioxide is prepared in the laboratory?

Answer 1

The most common method of preparation of Carbon dioxide in lab is by action of dilute mineral acids on Calcium Carbonate. It is easy to do, economical and comparatively safe and uses no energy.

Things needed:Apparatus:

1. Woulf's bottle (One having two necks)
2. Corks
3. Tubes
4. Gas cylinder
5. Wax
6. Thistle funnel

Chemicals:

1. Water
2. Hydrochloric acid dilute (30 percent preferably)
3. Marble pieces (Calcium carbonate)

Setting the apparatus:

1. First of all, Take a tube and bend it at two points on 90 degree angle.
2. Take a woulf bottle and fix two, bored corks in its openings.
3. Insert thistle funnel in one cork and delivery tube's one end in other.
4. Insert the other end of tube in a gas cylinder.
5. Make The Apparatus airtight by using wax or some other material.

Preparation of Gas:

1. Remove one cork and insert small calcium carbonate pieces in the bottle.
2. Close the bottle again. The funnel must be deep inside the marble pieces otherwise Gas will escape through it.
3. Start pouring Dilute Hydrochloric acid using thistle funnel.
4. Carbon dioxide will start forming and you will be able to detect its evolution by production of effervescence in the woulf's bottle.

Safety precautions:

1. Have a good ventelation system.
2. Wear a gas-mask or a simple mask, at least.
3. Be careful with acid, It can be really dangerous if you don't take care.
4. Carbon dioxide can suffocate you. Be careful.
5. Avoid prolonged exposure to Carbon dioxide.

Answer 2

In the laboratory the gas is made by pouring dilute hydrochloric acid on to marble chips (CaCO3)