Answer:
310 mL
Explanation:
Step 1: Given data
- Initial concentration (C₁): 7.10 M
- Final concentration (C₂): 0.400 M
- Final volume (V₂): 5.50 L
Step 2: Calculate the initial volume
We have a concentrated HBr solution and we want to prepare a diluted one. We can do so using the dilution rule.
C₁ × V₁ = C₂ × V₂
V₁ = C₂ × V₂ / C₁
V₁ = 0.400 M × 5.50 L / 7.10 M
V₁ = 0.310 L = 310 mL
