Question

The molerity of the sodium hydroxide solution by dissolving 4.0g of it, in 250 ml of water

Answer 1

Answer:

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Explanation:

Here, given mass of solute, NaOH = 4g

Molar mass of solute, NaOH = 40g/mol

Given Volume of solution = 250mL

Now, Using basic formula of Molarity

M = (given mass × 1000)/(Molar Mass × Vol. in mL)

Putting the given in formula we get,

M= (4×1000)/(40×250)

On solving,

Molarity, M =0.4mol/L

Hope this helps you.