A mixture of potassium carbonate and calcium carbonate is subjected to decomposition. The percentage loss in weight was 11%. Find out the ratio of the amount of potassium carbonate to calcium carbonate in the mixture.

1:3

No worries! We‘ve got your back. Try BYJU‘S free classes today!

3:1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

4:1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1:4

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 3:1
As we know, potassium carbonate does not decompose on heating. Calcium carbonate decomposes to give $C a O$ and $C O_{2}$ and loss in weight is equal to the amount of $C O_{2}$ formed.
Let the weight of mixture =100=100 g.
Loss in weight == Amount of $C O_{2}$ formed =11=11 g
4444 g $C O_{2}$ is formed from 100100 g $C a C O_{3}$
1111 g $C O_{2}$ is formed from =11×100/44=11×10044 =25=25 g $C a C O_{3}$
Weight of $K_{2} C O_{3}$ in the mixture =100−25=75=100−25=75 g
The ratio of $K_{2} C O_{3}$ and $C a C O_{3}$
=75:25
=3:1

Suggest Corrections

Similar questions

Q. Find out the loss in weight when 75 g of calcium carbonate is subjected to decomposition completely.

1.03 g

mixture of sodium carbonate and calcium carbonate require

20 m L N H C l

for complete neutralisation. Calculate the percentage of sodium carbonate and calcium carbonate in the given mixture.

A mixture of CaCl^2 and NaCl weighing 4.44g is treated with sodium carbonate solution to precipitate all the calcium ions as calcium carbonate . The calcium carbonate so obtainable is heated strongly to get 0.56g of CaO . The percentage of NaCl in mixture is

1.64 g

of a mixture of calcium carbonate and magneisum carbonate were dissolved in

50 m L

0.8 N

hydrochloric acid. The excess of the acid required

16 m L N / 4

sodium hydroxide solution for neutralisation. Find out the percentage composition of the mixture of two carbonates.

Q. A mixture of calcium and magnesium carbonates weighing 1.4 g was strongly heated until no further loss of weight was perceived. The residue weighed 0.76 g. What percentage of

M g C O_{3}

was present in the mixture?

Join BYJU'S Learning Program