Question

What is the concentration for the following solution? Make sure to use the appropriate units, show any

conversions necessary, and show your equation.
Molarity
12.5 pmoles NaCl in 900ml solution

Answer 1

The concentration of the NaCl solution with 12.5 pmoles of NaCl in 900 mL of solution is calculated by converting pmoles to moles and milliliters to liters, resulting in a molarity of 1.39 x 10^-11 M.

Step-by-step explanation:

The concentration of a solution can be defined as the amount of solute present in a given quantity of solvent or solution. In order to calculate the molarity of the NaCl solution with 12.5 pmoles (picomoles) of NaCl in 900 mL of solution, we can use the following formula:

Molarity (M) = Moles of solute / Volume of solution in liters

First, we need to convert picomoles to moles:

• 12.5 pmoles = 12.5 x 10-12 moles

Next, we convert the volume from milliliters to liters:

• 900 mL = 0.900 L

Now we can calculate the molarity:

Molarity = 12.5 x 10-12 moles / 0.900 L

Molarity = 1.39 x 10-11 M

Therefore, the concentration of the NaCl solution is 1.39 x10 -11 M