MyQuestionIcon

1

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

Gay Lussac's Law

1 L of pond w...

Question

$1 L$ of pond water contains $20 m g$ of $C a^{2 +}$ and $12 m g$ of $M g^{2 +}$ ions. What is the volume of a $2 N N a_{2} C O_{3}$ solution required to soften $5000 L$ of pond water ?

A

500 L

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

B

50 L

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

C

5 L

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

D

N o n e o f t h e s e

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

Open in App

Solution

The correct option is B $5 L$
Milli-equivalents of $C a^{2 +}$ + milli-equivalents of $M g^{2 +}$
= milli-equivalents of $N a_{2} C O_{3}$
$\frac{20}{20} + \frac{12}{12} = V \times 2$
$∴ V = 1 m L$ for $1 L$ of tap water
For $5000 L$ of pond water
$V = 5000 m L$ or $5 L$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Solve the following.
A pond in a field holds 120000 litres of water. It costs 18000 rupees to make such a pond. How many ponds will be required to store 480000 litres of water, and what would be the expense?

Q. A sample of hard water contains

96 ppm

S O 4_{4}^{2 -}

183 ppm

H C O_{3}^{-}

ions and the only cation present is

C a^{2 +}

X

C a O

are required to remove the

H C O_{3}^{-}

1000 kg

of this sample of water. When the same amount of

C a O

is added to the water sample, the concentration of residual

C a^{2 +}

ions (in ppm) becomes Y.
(Assume

C a C O_{3}

to be completely insoluble in water)
If the residual

C a^{2 +}

1 L

of the above -mentioned water sample is completely replaced by hydrogen ions, what will the

p H

of the resultant sample of hard water?

Q. Assertion :A man is sitting in a boat which is floating on a pond. If the man drinks some water from the pond, the level of water in the pond decreases. Reason: The volume of water in the pond decreases.

Q. What is the amount of lime

C a {(O H)}_{2}

required to remove the hardness in

60

litres of pond water containing

1.62

mg of calcium bicarbonate per

100

Question 10
A pond contains clean water. Which of the following activities will produce least pollution of water?
(a) washing clothes in the pond
(b) animals bathing in the pond
(c) washing motor vehicles in the pond
(d) swimming in the pond

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Gay Lussac's Law

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Gay Lussac's Law

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon