How many fluid ounces of a 25 index arterial fluid are needed to prepare one gallon of solution with a strength of one percent?

To determine how many fluid ounces of a 25 index arterial fluid are needed to prepare one gallon of solution with a strength of one percent, it's essential to understand the mixing ratios and the calculations involved.

A gallon is equal to 128 fluid ounces. When creating a one percent solution, this means that one percent of the total solution volume should be the active ingredient, which in this case is the 25 index arterial fluid.

To calculate how many fluid ounces of the arterial fluid are needed for a one percent solution in one gallon (128 fluid ounces):

1. Calculate one percent of 128 fluid ounces:

• 1% of 128 = 0.01 × 128 = 1.28 fluid ounces of pure arterial fluid.

2. Now, since you're using a 25 index fluid, which is the concentration of the arterial fluid, it's important to convert this amount to the required volume of the 25 index solution.

• The calculation involves adjusting the concentration level from 100% (pure) to 25%.

To prepare 1.28 fluid ounces of pure arterial fluid using the 25 index solution, you divide by the concentration:

• Volume of 25 index arterial fluid needed = amount of pure fluid required