MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Stoichiometric Calculations

1.64 g of a m...

Question

$1.64$ g of a mixture of $C a C O_{3}$ and $M g C O_{3}$ was dissolved in $50$ mL of $0.8 M H C l$ . The excess of acid required $16$ mL of $0.25 M N a O H$ for neutralization. Calculate the percentage of $C a C O_{3}$ in the sample.

A

51 %

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

B

75 %

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

C

49 %

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

D

25 %

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

Open in App

Solution

The correct option is B $49 %$
The balanced reaction is as follows:
$C a C O_{3} + 2 H C l \to C a C l_{2} + H_{2} O + C O_{2}$
$x$ $2 x$
$M g C O_{3} + 2 H C l \to M g C l_{2} + H_{2} O + C O_{2}$
$y$ $2 y$
$2 x + 2 y = \frac{(50 \times 0.8 - 16 \times 0.25)}{1000} \Rightarrow x + y = 0.018$ .......(1)
$x \times 100 + y \times 84 = 1.64$ ........(2)
$% C a C O_{3} = \frac{x \times 100}{1.64} \times 100 = 48.78 %$
$% M C O_{3} = 52.22 %$

Suggest Corrections

thumbs-up

0

Similar questions

1.5

g of chalk was treated with

10

4 N

H C l

. The chalk was dissolved and the solution was made to

100

25

mL of this solution required

18.75

0.2 N

N a O H

solution for complete neutralisation. Calculate the percentage of pure

C a C O_{3}

in the sample of chalk?

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.

1

g sample of washing soda was dissolved in

50

1 M H C l

. The excess acid required for the neutralization of

21.13

1.018 M B a (O H_{2})

. The degree of hydration of washing soda is :

Q. 2.0 g of chalk was dissolved in 10 ml of 4N HCl and the solution was made up to 100 ml. 25 ml of this solution required 18.75 ml of 0.2 N NaOH solution for complete neutralization. Calculate the percentage of pure

C a C O_{3}

in the sample of chalk?

Q. Calculate the percentage of available chlorine in a sample of

3.546 g

of bleaching powder which was dissolved in

100 m L

25 m L

of this solution, when treated with acetic acid and excess

K I

20 m L o f 0.125 N

sodium thiosulphate solution.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Stoichiometric Calculations

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Stoichiometric Calculations

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon