Question

61. A solution is prepared by dissolving 18.25 g of sodium
hydroxide (NaOH) in distilled water to give (1) 1.000 L
(ii) 400 cm3 of solution. Calculate the molarity of NaOH
in the solution.​

Answer 1

Answer:

I)0.45625M

II)1.140625M

Explanation:

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

Moles=mass/molar mass

18.25/40=0.45625

I) 0.45625 moles in 1 litre

=0.45625M

II)400cm3=0.45625moles

1000cn3=0.45625*1000/400

=1.140625M

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