Question

how many grams of NaOH should be dissolved to make 100 ml of 0.15 M NaOH solution​

Answer 1

Answer:

0.06gm

Explanation:

No.of moles of NaOH= 100*0.15=15milimole =0.015mole

Mass OFNAOH used= 0.015*40 =0.06gm

Hope it helps u

Answer 2

The mass of NaOH that should be added is 0.6 grams

Explanation:

To calculate the mass of NaOH, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Molarity of solution = 0.15 M

Molar mass of NaOH = 40 g/mol

Volume of solution = 100 mL

Putting values in above equation, we get:

$0.15M=\frac{\text{Mass of NaOH}\times 1000}{40\times 100}\\\\\text{Mass of NaOH}=\frac{0.15\times 100\times 40}{1000}=0.6g$

Learn more about molarity of solution:

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