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Percentage Composition

Determine tge...

Question

Determine tge percentage composition of a mixture of anhydrous sodium carbonate and sodium bicarbonate from the following data : weight of mixture taken = 2g loss in weight on heating = 0.11

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4

g of a mixture of dry sodium carbonate and sodium bicarbonate containing

75 %

of the latter was heated until there was no loss in the weight. Calculate the volume of

C O_{2}

evolved at STP (in mL).

Q. 2.0 g mixture of sodium carbonate and sodium bicarbonate on heating to constant mass gave 224 mL of

C O_{2}

at NTP. The % mass of sodium bicarbonate in the mixture is:

A

2.0

g sample of a mixture containing sodium carbonate, sodium bicarbonate and sodium sulphate is gently heated till the evolution of

C O_{2}

ceases. The volume of

C O_{2}

750

mm of Hg pressure and at

298

K is measured to be

123.9

A

1.5

g of the same sample requires

150

\frac{M}{10} H C l

for complete neutralisation. The percentage composition of the components of the mixture will be :

Q. A solid mixture (5 gm) consists of lead nitrate and sodium nitrate, was heated below

600^{\circ} C

until weight of residue was constant. If the loss in weight is 28% find amount of lead nitrate and sodium nitrate in the mixture.

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