Question

how much water should be added to 2L solution of 10 N H2C2O4 at 298K temperature to obtain 10 M concentration
plz answer with full method ​

Answer 1

Answer:

Correct option is

A

4 gm

Molarity (M) : The number of moles of a solute dissolved in 1 L (1000 ml) of the solution is known as the molarity of the solution.

Molarity of a solution

(M)=

molar mass of solute

mass of solute

×

volume of solution in mL

1000

∴0.2=

40

w

×

500

1000

so w=4gm.

Amount of sodium hydroxide present in 500ml of 0.2M solutions is 4 gm.