What is the percent strength of a solution with a ratio of 1:100?

To determine the percent strength of a solution expressed as a ratio, it's essential to understand that a ratio of 1:100 indicates there is 1 part of solute for every 100 parts of solution. The percent strength is calculated by taking the amount of solute and dividing it by the total amount of solution, then multiplying by 100 to convert it into a percentage.

In this case, with a ratio of 1:100:

• There is 1 part of solute, and the total solution is 100 parts (1 part solute + 99 parts solvent).

• To find the percent strength, the calculation would be (1 part solute / 100 parts solution) × 100%, which equals 1%.

Thus, the percent strength of the solution is 1%, making it the correct answer in this scenario. This understanding of converting the ratio to a percent strength is fundamental in pharmacy calculations, particularly for preparing and mixing solutions where the concentration impacts dosage and efficacy.