UncategorizedMolarity of 4%w/v NaOH solution is

Molarity of $4 % (w / v) NaOH$ solution is

A
$0.1 M$
B
$0.5 M$
C
$0.01 M$
D
$1.0 M$

Solution:

4% NaOH indicates that 4 g of NaOH present in 100 mL of solution. Moles of 4 g of NaOH:

$Moles = \frac{Mass}{Molar mass} = \frac{4 g}{40 g / mol}$

Molarity is calculated as:

$Molarity = \frac{number of moles of solute}{Volume of solution (in L)} Molarity = \frac{4 g}{40 g / mol} \times \frac{1000}{100 mL} = 1.0 M$

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