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The normality of orthophosphoric acid having purity of 70 % by weight and specific gravity 1.54 is:
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29/09/2020 8:15 pm
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The normality of orthophosphoric acid having purity of 70 % by weight and specific gravity 1.54 is:
(a) 11 N
(b) 22 N
(c) 33 N
(d) 44 N
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29/09/2020 8:19 pm
(c) 33 N
Explanation:
70% by weight means
Wt. of solute = 70 g
Wt. of solution = 100 g
∴ Vcc of solution = mass/density = 100/1.54
We know that
N = W x 1000/Eq. Wt x Vcc
= 70 x 3/98 x 1000 x 1.54/100
= 33N
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