Question

What is the molarity of a solution prepared by dissolving 30.0 grams of NaOH in enough water to make a solution with a total volume of 2.40 liters

Answer 1

Answer:

$\fbox{0.3125 M}$

Given:

• Given mass of NaOH = 30 gram
• Molar mass of NaOH = 40 gram
• Volume = 2.40 litres

To find:

Molarity = ?

Solution:

Molarity is nothing but the number of moles of solute dissolved in per litre of solution. given by formula,

$Molarity = \frac{given \: mass}{molar \: mass \times Volume}$

$\sf Molarity \: = \frac{30}{40 \times 2.4} = 0.3125 \: M$

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