Answer:
0.67 dm³
Explanation:
We are given;
- Initial molarity, M1 as 4.5 mol/dm³
- Final volume, V2 as 2.5 dm³
- Final Molarity , M2 as 1.20 mol/dm³
We are required to determine the initial volume, V1
To answer the question we need to know the dilution formula;
The dilution formula is given by;
M1V1 = M2V2
Thus;
V1 = M2V2 ÷ M1
= ( 1.20 mol/dm³ × 2.5 dm³) ÷ 4.5 mol/dm³
= 0.67 dm³
Hence, the initial volume before dilution is 0.67 dm³
