A Burrows solution 100-ml label reads 1:7.5 v/v What is the volume of Burrows solution in the total volume?

volume of Burrows = 11.76 ml ( to 2 decimal places)

Explanation:

Total volume of solution = 100 ml

Ratio of Burrows to solvent = 1 : 7.5 v/v

This means that in every 8.5 (1 + 7.5) ml of solution, the volume of Burrows is 1 ml

8.5 ml of solution = 1 ml of Burrows

1 ml of solution = 1/8.5 ml of Burrows

∴ 100 ml of solution = 100 × 1/8.5 ml of Burrows

100 × 1/8.5 = 100 ÷ 8.5 = 11.76 ml

∴ volume of Burrows = 11.76 ml ( to 2 decimal places)

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.