MyQuestionIcon

1

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

Molarity

The number of...

Question

The number of moles of sodium carbonate (Na₂CO₃) present in 10 L of 2 M solution is .

A

20

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

B

2

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

C

10

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

Open in App

Solution

The correct option is A 20
Molarity is defined as number of moles of solute present per litre of solution.

Given, M = 2 $m o l L^{- 1}$
Volume of solution = 10 L

$M$ = $\frac{N u m b e r o f m o l e s o f s o l u t e}{V o l u m e o f s o l u t i o n i n l i t r e s}$

${2 mol L}^{- 1}$ = $\frac{N u m b e r o f m o l e s o f s o l u t e}{10 L}$
Number of moles = 2 $m o l L^{- 1}$ x 10 L
= 20 moles

Suggest Corrections

thumbs-up

7

Similar questions

Q. How many moles of Na+ ions are present in 318g sodium carbonate? (Molar mass of Na2CO3= 106g)

Q. 250 ml of a sodium carbonate solution contains 2.65grams of Na2Co3. 10ml of this solution is added to x ml of water to obtain 0.001M Na2Co3 solution. What is the value of x in ml?

Q. The ratio of moles of

N a_{2} C O_{3}

to total number of moles in a 100 mL aqueous solution of

N a_{2} C O_{3}

is 1:5. If 90 g of water is present in 100 mL of solution, find the molarity of the solution.

Q. 25.3 g of sodium carbonate

N a_{2} C O_{3}

is dissolved in enough water to make 250 mL of solution .If sodium carbonate dissociates completely molar concentration of sodium ions

N a^{+}

and carbonate ions are respectively (molar mass of

N a_{2} C O_{3} = 106 g m o l^{- 1}

Q. The ratio of moles of

N a_{2} C O_{3}

to total number of moles in a 100 mL aqueous solution of

N a_{2} C O_{3}

is 1:5. If 90 g of water is present in 100 mL of solution, find the molarity of the solution.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Molarity

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon