Hydrogen is collected over water.

A sample of hydrogen was collected over water at 21^(@)C and 685mm Hg. The volume of the container was 7.80 L. Calculate the mass of H_(2)(g) collected (vapour pressure of water = 18.6 mm Hg at 21^(@)C )

Give reason for the following: Purified and dried hydrogen is collected over mercury

Exactly 100 mL of oxygen is collected over water of 23^(@)C and 800 mm pressure. Calculate the volume of dry oxygen at NTP . (Vapour pressure of water at 23^(@)C is 21 mm .)

Why Carbon dioxide is not collected over water.?

750 mL of nitrogen are collected over water at 25^@C and 740 mm pressure. If the aqueous tension at this temperature is 23.8 mm Hg, calculate the mass of the dry gas.

A mixture of helium of neon gases is collected over water at 28.0^(@)C and 745 mmHg. If the partial pressure of helium is 368 mmHg, what is the partial pressure of neon?

Hydrogen chloride gas is not collected over water. Explain why?

Give reasons : Hydrogen is collected by downward displacement of water.

A sample of gas is collected over water at at a barometric pressure of 751 mm Hg (vapour pressure of water at is 21 mm Hg).The partial pressure of gas in the sample collected is

The following questions are based on the preparation of ammonia gas in the laboratory : Explain why it is not collected over water.