First slide

Concentration methods

Question

3 litres of 1.5 M H₃PO₃ is diluted to 0.25 M solution. Final volume of the solution is ------- litres

Moderate

A

18
B

21
C

24
D

15

Solution

$V_{1} M_{1} = V_{2} M_{2}; 3 (1.5) = V_{2} (0.25); V_{2} = 18 litres;$

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