Home
Class 11
CHEMISTRY
A" " 5.0 g sample of felspar containing ...

`A" " 5.0 g` sample of felspar containing `Na_(2)O,K_(2)O` and some inert impurity is dissolved in dilute `HCl` solution and `NaCl` and `KCl` formed are separated by fractional crystallization. During crystallization some less soluble impurities also come out. Mass of `NaCl, KCl` and impurity accompanying these salts was found to be `6.47 g`. Solid crystal was then re-dissolved and required `300mL` of `0.3M AgNO_(3)` for complete precipitation of chlorides. The precipitate this, obtained ws found to contain `4.23%` insoluble impurity. Determine mass percentage of `Na_(2)O` and `K_(2)O` in the original sample:

Promotional Banner

Similar Questions

Explore conceptually related problems

2.5 g of a sample containing Na_(2)CO_(3) , NaHCO_(3) and some non-volantile impurity on gentle heating loses 12% of its weight. Residue is dissolved in 100 mL water and its 10 mL portion required 15mL 0.1M aqueous solution of BaCl_(2) for complete precipitation of carbonates. Determine mass percentage of Na_(2)CO_(3) in the original sample?

Calculate the volume of 0.1M AgNO_(3) solution required for complete precipitation of chloride ions present in 30 mL of 0.01M solution of [Cr(H_(2)O)_(6)]Cl_(3) .

1.0g of a sample containing NaCl, KCl and some inert impurity is dissolved in excess of water and treated with excess of AgNO_(3) solution. A 2.0 g precipitate to AgCl separate out. Also sample is 23% by mass in sodium. Determine mass percentage of KCl in the sample :

The process in which dissolved solute comes out of solution and forms crystals is called

1.5 g of a mixture containing As_2O_5 , Na_2HAsO_3 , and some inert impurities is dissolved in water, and the solution is kept neutral by adding excess of NaHCO_3 . The solution when titrated with 0.1 M I_2 required 35.0 nL of it for complete titration. The solution is then acidified and excess of KI is added to it. The I_2 liberated required 35.0mL of 0.3 M Na_2S_2O_3 solution for complete titration. Find the percentage composition of the mixture (Atomic mass of As is 75, Na is 23 and O is 16.)

1.5 g of a mixture containing As_2O_5 , Na_2HAsO_3 , and some inert impurities is dissolved in water, and the solution is kept neutral by adding excess of NaHCO_3 . The solution when titrated with 0.1 M I_2 required 35.0 nL of it for complete titration. The solution is then acidified and excess of KI is added to it. The I_2 liberated required 35.0mL of 0.3 M Na_2S_2O_3 solution for complete titration. Find the percentage composition of the mixture (Atomic mass of As is 75, Na is 23 and O is 16.)

Equal weight of NaCl and KCl are dissolved separately in equal volumes of solutions, then the molarity