You need 520. mL of a 15 % (m/v) glucose solution. If you have a 25% (m/v) glucose solution on hand, how many milliliters do you need?

To find out how many milliliters of the 25% glucose solution you need, we can use the formula:

(C1)(V1) = (C2)(V2)

Where:
C1 = concentration of the first solution (25% or 0.25)
V1 = volume of the first solution (unknown)
C2 = concentration of the second solution (15% or 0.15)
V2 = volume of the second solution (520 mL)

In this case, we want to solve for V1, so we can rearrange the formula:

V1 = (C2)(V2) / C1

Substituting the given values:

V1 = (0.15)(520 mL) / 0.25

Calculating this:

V1 = 78 mL

Therefore, you would need 78 mL of the 25% (m/v) glucose solution.

116 mL

213