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Q.

A certain quantity of Ammonium chloride is boiled with 100 ml of 0.8 N NaOH till no further action occurs. Excess of NaOH required 40 ml of 0.75 N sulphuricacid to neutralise if. How much Ammonium chloride was used?

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a

405 g

b

5 g

c

2.675 g

d

1 g

answer is C.

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Detailed Solution

Vmlof  0.8N NaOH    40  ml   of   0.75N    H2SO4

V×0.8=40×0.75

V=37.5ml

Volume  of 0.8 N NaOH consumed by NH4Cl

=100-37.5

=62.5 ml

number of moles of NaOH=0.05 therefore number of moles of NH4Cl will  be 0.05 hence 53.5 x 0.05 = 2.675 grams

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