Question #64184
1 Answer
You'd need 62 mL of concentrate for the second solution.
Explanation:
So, you know that 5 L of concentrate are used to make a 166-L solution.
Assuming that you're dealing with a volume by volume percent concentration, you know that
The volume by volume percent concentration of a solution is defined as the volume of solute divided by the total volume of the solution and multiplied by 100.
In your case, the solution will have a v/v percent concentration of
Now, for your second solution, the total volume of the solution will be
This means that, in order to get a 3.01% v/v solution that uses 2 L of water, you need to add
So, to prepare a 3.01% v/v solution with 2 L of water, you need to use 62 mL of concentrate.
ALTERNATIVE METHOD
Alternatively, you can use something called the dilution factor, which is defined as
The first solution will have a dilution factor of
For the second solution, you know that the volume of the solution is
The dilution factor must be the same, so you have
