You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl
To find the amount of stock NaCl solution needed, we can use the equation:
(C1)(V1) = (C2)(V2)
Where:
C1 = concentration of the stock NaCl solution (100 mg/ml)
V1 = volume of the stock NaCl solution needed
C2 = desired concentration (20 mg/ml)
V2 = final volume (10 ml)
We can rearrange the equation to solve for V1:
V1 = (C2 * V2) / C1
Substituting the given values into the equation:
V1 = (20 mg/ml * 10 ml) / 100 mg/ml
V1 = 2 ml
Therefore, you need to use 2 ml of the stock NaCl solution to make 10 ml of 20 mg/ml NaCl.