You need 25ml of 2% milk solution (v/v. How much milk and water will you need?
To calculate the amount of milk and water needed to make a 25ml solution of 2% milk, we first need to understand what "2% milk solution (v/v)" means.
The term "v/v" stands for volume/volume, which indicates the concentration of the solution as a volume percentage. For example, a 2% milk solution (v/v) means that 2ml of milk is present in every 100ml of the solution.
To determine the amount of milk and water needed, we can set up the following equation:
milk volume + water volume = 25ml
Since we want a 2% milk solution, the milk volume should be 2% of the total solution volume. Let's denote the milk volume as "x" (in ml).
Therefore, the water volume can be expressed as (25 - x) ml, as the total solution volume (25ml) minus the milk volume.
To find "x," we can set up the equation:
x ml (milk volume) = (2/100) * 25ml
x ml = 0.02 * 25ml
Simplifying the equation, we find:
x ml = 0.5ml
Therefore, you would need 0.5ml of milk and (25 - 0.5) ml = 24.5ml of water to make a 25ml solution of 2% milk.