First slide

Concentration methods

Question

5 litres of 3 M H₂SO₄ and 2 litres of 1 M NaOH are mixed with each other.The solution is diluted to ten litres. Normality of the resultant mixture is ----- N

Moderate

A

2.2
B

2.8
C

3
D

2.4

Solution

$V_{a} N_{a} = 5 (3) 2; V_{b} N_{b} = 2 (1) 1; V_{a} N_{a} > V_{b} N_{b}; N = {[H]}^{+} = \frac{V_{a} N_{a} - V_{b} N_{b}}{Total volume of the mixture}; N = {[H]}^{+} = \frac{5 (3) 2 - 2 (1) 1}{10} N = 2.8 N;$

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