What is the molarity (mol/dm3) of a solution prepared by dilution of 0.125 moles of sodium chloride (NaCl) to 2.50x102 mL with water?

M = mols/L

15MOL

To find the molarity of a solution, you need to know the amount of solute (in moles) and the volume of the solution (in liters).

Given:
Amount of solute (n) = 0.125 moles
Volume of solution (V) = 2.50x10^2 mL

First, convert the volume of the solution from milliliters (mL) to liters (L):
V = 2.50x10^2 mL = 2.50x10^2 / 1000 = 0.250 L

Next, use the formula for molarity:
Molarity (M) = n / V

Substitute the given values into the formula:
M = 0.125 moles / 0.250 L

Now, divide 0.125 by 0.250 to find the molarity:
M = 0.5 mol/L

Therefore, the molarity of the solution prepared by diluting 0.125 moles of sodium chloride (NaCl) to a volume of 2.50x10^2 mL with water is 0.5 mol/L or 0.5 mol/dm^3.