Question

2.46 gram of sodium hydroxide (molar mass= 40) are dissolved in water and the solution is 200 cm^3 in a volumetric flask calculate the molarity of the solution.​

Answer 1

Answer=》Amount of NaOH =2.4 g

Volume of solution=100cm^3

Mass of NaOH

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

Molar mass

2.46

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

40

Moles of NaOH

Now, molarity= ―――――――――――×1000

Volume Of Solution

0.0615

= ―――――――×1000

100

=0.615 M

Answer 2

Here is ur answer:

Amount of NaOH= 2.46

Volume of solution= 100cm³

Mole of NaOH$= \frac{mass \: of \: </em><em>NaOH</em><em>}{molar \: mass} = \frac{2.46}{40} = 0.0615$

Morality =

$\frac{moles \: of \: </em><em>NaOH</em><em>}{volume \: of \: solution} \times 1000$

$= \frac{0.0165}{100} \times 1000$

=0.615M