Question

Find molarity of 40 gram NaOH dissolved in 250 litter find the molarity of 4.9 gram H2SO4 in present is 500cm3 solution

Answer 1

NaOH

given weight = 40g

molecular wt = 40g

volume of solution = 250l

molarity = no. of moles of NaOH /

volume of solution in litres

no. of moles = given wt / molecular wt

=40/40

=1

molarity= 1/250

= 0.004M

H2SO4

Given wt = 4.9g

molecular wt= 98g

volume of solution= 500cm³

=500 x 0.001litre

=0.5litre

no. of moles= 4.9/98

= 0.05

molarity= 0.05/0.5

=0.1M

Answer 2

Explanation:

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