Question

Find the volume of the solution obtained if 10 grams of naoh 1/20 molarity of naoh sol is present

Answer 1

Mass of NaOH = 10g

Concentration of NaOH = 1/20 mol/dm³ = 0.05mol/dm³

Molar mass of NaOH = 23+16+1 = 40g/mol

number of moles of NaOH = mass of NaOH / (molar mass of NaOH)

no of moles = 10/40

no of moles = 0.25mol

To get the Volume of the solution

Recall,

Concentration = no of moles / (Volume)

Volume = no of moles / concentration

Volume = 0.25/0.05

Volume = 5dm³ or 5000cm³

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