Question

calculate the weight of sodium hydroxide required to prepare 0.5 normality NaoH solution in 2litres​

Answer 1

Answer:

How would you prepare 100mL of 0.5 M sodium hydroxide?

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Here, volume of sodium hydroxide = 100mL

Molar concentration = 0.5M

Molecular wt. of sodium hydroxide (NaOH) = 40

Required sodium hydroxide,w = ?

We know,

Molar conc.= (Wt.of solute÷ molecular wt.of solute)×(1000÷ volume in mL)

or, 0.5 = (w÷40)×(1000÷100)

or, w = (0.5×40)÷10

or, w = 2

Therefore, to prepare 100mL of 0.5M sodium hydroxide solution required amount of sodium hydroxide is 2 grams.