Grade 12Physical Chemistry

2.46g of sodium hydroxide (molar mass=40)are dissolved in water and the solution is made to 100cm3 in a volumetric flask.calculate the molarity of the solution.

Suveka

9 Years agoGrade 12

3 Answers

varun

9 Years ago

HELLO SUVEKA,

weight of the solute = 2.46gm

molar mass of the solute = 40g/ml

volume of the solution = 100ml

so,Molarity = 1000XW2

----------------

V X M2

=1000 X 2.46

--------------------

100 X 40

so molartity = 0.615M

so answer is 0.615

THANK YOU

Ritesh kumawat

7 Years ago

Amount of NaOH =2.4 g

Volume of solution=100cm^3

Mass of NaOH

Moles of NaOH= -----------------------------

Molar mass

2.46

=---------------. =0.0615

Moles of NaOH

Now, molarity= ―――――――――――×1000

Volume Of Solution

0.0615

= ―――――――×1000

100

=0.615 M

Study keda

7 Years ago

Amount of NaOH =2.4 gVolume of solution=100cm^3 Mass of NaOHMoles of NaOH= ----------------------------- Molar mass 2.46 =---------------. =0.0615 40 Moles of NaOHNow, molarity= ―――――――――――×1000 Volume Of Solution 0.0615 = ―――――――×1000 100 =0.615 M