Home
Class 11
CHEMISTRY
In the analysis of 0.1 of sample of feld...

In the analysis of 0.1 of sample of feldspar, 0.118 g of mixture of NaCl and KCl is obtained which on treatment with `AgNO_3` gives 0.2451 of AgCl. Calculate the precentage of `Na_2O` and `K_2O` in feldspar.

Text Solution

Verified by Experts

Let the amount of sodium chloride be a gram.
The amount of potassium chloride is `(0.1180-a)g`.
`NaCl+AgNO_(3)toAgCl+NaNO_(3)`
`NaCl-=AgNO_(3)` formed is
`(a)/(58.5)xx143.5`
`KCl+AgNO_(3)toAgCl+KNO_(3)`
`KCl-=AgNO`
The mass of `AgNO_(3)` formed is
`((0.1180-a))/(58.6)xx143.6`
`therefore[(a)/(58.5)xx143.5]+[((0.1180-a))/(74.5)xx143.5]=0.2451`
On solving we get
`a=0.0338` (mass of NaCl)
`Na_(2)O-=2NaCl`
`therefore(W_(Na_(2)O)/(62)=(0.0038)/(2xx58.5)`
or `W_(Na_(2)O)=0.0179g`
Percentage of `Na_(2)O=(0.079xx100)/(0.500)=3.58%`
`(0.1180-a)=(mass of KCl)`
`(0.1180-0.0338)=0.0842g` (mass of KCl)
`K_(2)O-=2NaCl`
`(W_(K_(2)O)/(94)=(0.0038)/(2xx74.5)`
or `W_(K_(2)O)=0.031g`
percentage of `K_(2)O=(0.0531xx100)/(0.500)=10.62%`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • STOICHIOMETRY

    CENGAGE CHEMISTRY|Exercise Archives Integer|2 Videos
  • STATES OF MATTER

    CENGAGE CHEMISTRY|Exercise Exercises (Ture False)|25 Videos
  • THERMODYNAMICS

    CENGAGE CHEMISTRY|Exercise Archives (Subjective)|23 Videos

Similar Questions

Explore conceptually related problems

In the analysis of a 0 .50 -g sample of feldspar, mixture, of the chlorides of Na and K is obtained, which weight 0.1180 g . Subsequent treatment of the mixed chlorides. with silver nitrate gives 0.2451 g of AgCl . What is the percentage of sodium oxide and potassium oxide in feldspar ?

IN the analysis of 0.5 g sample of feldspar, a mixture of chlorides of sodium and potassium is obtained which weighs 0.1180 g . Subsequent treatment of the mixed chlorides with silver nitrate gives 0.2451 g of silver chloride. What is the percentage of sodium oxide and potassium oxide in the sample ?

Knowledge Check

  • 7.36 g of a mixture of KCl and Kl was dissolved in H_2O to prepare 1 litre solution. 25 ml of this required 8.45 ml of 0.2 N AgNO_3, what are precentage of Kl in mixture ?

    A
    57.28
    B
    5.72
    C
    47.28
    D
    49.12
  • 1 g of a mixture of NaHCO_(3) and Na_(2)CO_(3) is heated to 150^(@)C . The volume of the CO_(2) produced at STP is 112.0 mL. Calculate the percentage of Na_(2)CO_(3) in the mixture (Na=23, C=12, O=16)

    A
    20
    B
    46
    C
    84
    D
    16
  • Similar Questions

    Explore conceptually related problems

    0.9031 g of a mixture of NaCl and KCl on treatment with H_(2)SO_(4) gave 1.0784 g of a mixture of Na_(2)SO_(4) and K_(2)SO_(4) . Calculate percentage composition of the original mixture.

    The normality of the mixture of HCl and H_(2)SO_(4) solution is N//5 . 0.287 g of AgCl is obtained when 20 mL of this solution is treated with excess of AgNO_(3) . Calculate the percentage of both the acids in the mixture.

    10 mL of a solution of NaCl gave on evaporation 0.93 g of the mixed salt which gave 1.865 of AgCl by reacting with AgNO_(3) solution. Calculate the quantity of NaCl in 10 mL of the solution.

    3.0 g sample of KOCl and CaOCl_(2) is dissolved in water to prepare 100 mL solution, which requried 100 " mL of " 0.15 M acidified K_(2)C_(2)O_(4) . For the point. The clear solution is now treated with excess of AgNO_(3) solution which precipitates 2.87 g of AgCl . Calculate the mass percentage of KOCl and CaOCl_(2) in the mixture.

    A mixture containing KCl and NaCl was dissolved and total halide was determined by titration with silver nitrate. A sample weighing 0.3250 g required 51 mL of 0.1 N solution. Calculate the percentage of each salt in the sample.

    A sample of a mixture of CaCl_(2) and NaCl weighing 4 . 22 g was treated to precipitate all Ca as CaCO_(3) which was then heated and quantitatively converted to 0 . 959 g of CaO .Calculate the percentage of CaCl_(2) in the mixture. (Ca = 40 , O = 16 , C = 12 and Cl = 35 . 5)