Home
Class 11
CHEMISTRY
Oxygen gas generated by the decompositio...

Oxygen gas generated by the decomposition of potassium chlorate is collected. The volume of oxygen collected at `24^(@)C` and atmospheric pressure of `760 m m Hg` is `128 mL`. Calculate the mass `(` in grams `)` of oxygen gas obtained. The pressure of water vapour at `24^(@)C` is `22.4 m m Hg`.

A

1.36 g

B

1.52 g

C

0.163 g

D

1.63 g

Text Solution

Verified by Experts

The correct Answer is:
c
(c) Form the total pressure and the vapour pressure of water we can calculate the partial pressure of `O_(2)`.
`P_(O_(2))=P_(T)-P_(H_(2)O)`
`=760-22.4`
`=737.6 mm " "Hg`
From the ideal gas equation we write
`m=(PVM)/(RT)`
`=((0.974atm)(0.128L)(32.0g//mol))/((0.0821Latm//K mol)(273+24)K)`
`=0.163g`
Promotional Banner

Topper's Solved these Questions

  • GASEOUS STATE

    NARENDRA AWASTHI|Exercise Level 1 (Q.31 To Q.60)|1 Videos

  • GASEOUS STATE

    NARENDRA AWASTHI|Exercise Level 1 (Q.121 To Q.150)|1 Videos

  • ELECTROCHEMISTRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|1 Videos

  • IONIC EEQUILIBRIUM

    NARENDRA AWASTHI|Exercise Exercise|196 Videos

Similar Questions

Explore conceptually related problems

2 g of a gas collected over water at 20^(@)C and under a pressure of 770mm Hg occupied 800ml. Calculate the volume of dry gas at S.T.P. condition. Vapour pressure of water at 20^(@)C is 15mm Hg.

35 mL of oxygen were collected at 6^(@)C and 758 mm pressure. Calculate its volume at NTP.

At 27^(@)C a gas under a pressure of 750 mm of Hg occupies a volume of 76 mL. Calculate the volume of gas at N.T.P.

1.22 g of a gas measured over water at 150^(@)C and a pressure of 775 mm of mercury occupied 900 mL. Calculate the volume of dry gas at NTP. Vapour pressure of water at 15^(@)C is 14 mm.

A sample of O_(2) is collected over water at 22^(@)C and 748 torr pessure. The volume of the gas collected is 82.0 cm^(3) . How many grams of oxygen are present in the gas?. The valour pressure of water at 22^(@)C is 19.8 torr.

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 )

A given mass of a gas collected over water vapour at 25^(@)C has a pressure of 500 mm Hg. Calculate the pressure if its volume is reduced to half of its original volume (aqueous tension at 25^(@)C="24 mm of Hg" ).

Calculate the volume occupied by 7 g of nitrogen gas at 27^(@)C and 750 mm Hg pressure

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 .)