If a dilution requires 5 ounces of concentrate for 1 gallon, how much concentrate is needed for 1/2 gallon?

To determine how much concentrate is needed for 1/2 gallon, we can start with the information that 5 ounces of concentrate is required for 1 gallon. Since 1/2 gallon is half of 1 gallon, we simply need half of the 5 ounces of concentrate.

Calculating half of 5 ounces:

5 ounces ÷ 2 = 2.5 ounces

Therefore, for 1/2 gallon, you would need 2.5 ounces of concentrate. This is why the answer is correct. It is important to approach dilution ratios by understanding that they are proportionate; when you reduce the volume of the solution, you also reduce the volume of the concentrate needed proportionally.