In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassuim tetraoxomanganate(VII) the produced is dried by passing it through

whit3

2 years ago

CORRECT A.

In the laboratory preparation of chlorine from concentrated hydrochloric acid in the presence of potassium permanganate(VII), the produced chlorine gas is dried by passing it through concentrated sulfuric acid.

qudus2019

8 years ago

It is dried by passing it through H2S04. It is used because hydrochloric acid cant react with tetraoxosulphate(vi)

Pinki456

1 year ago

The correct answer is B. Anhydrous calcium chloride.

Here's why:

- Chlorine gas is produced in the laboratory by reacting concentrated hydrochloric acid with potassium tetraoxomanganate(VII) (KMnO4).
- The produced chlorine gas is likely to be moist, as it is generated from an aqueous reaction mixture.
- To dry the chlorine gas, it needs to be passed through a desiccant, a substance that absorbs moisture.

Anhydrous calcium chloride (CaCl2) is a suitable desiccant for drying chlorine gas because:

1. It is a strong dehydrating agent, capable of absorbing moisture from gases.
2. It is non-reactive with chlorine gas, unlike sodium hydroxide (NaOH), which would react with chlorine to form hypochlorite.
3. It is more effective than concentrated tetraoxosulphate(VI) acid (H2SO4), which might react with chlorine to form chlorosulfuric acid.
4. Calcium oxide (CaO) is not suitable, as it might react with chlorine to form calcium hypochlorite.

Therefore, passing the chlorine gas through anhydrous calcium chloride effectively removes moisture, resulting in dry chlorine gas.

So, the correct answer is B. Anhydrous calcium chloride.