Question

What is the molarity of a solution that contains 0.400 mol hcl in 9.79 l solution?

Answer 1

• M = 0.0409 M

Step-by-step explanation:

1) Data:

a) Molarity, M = ?

b) Number of moles, n = 0.400 mol

c) Volume, V = 9.79 liters

2) Formula:

The definition of molarity is number of moles of solute per volume of solution in liters.

• M = n / V (in liters)

3) Calculations:

• M = 0.400 mol / 9.79 liter = 0.04086 M

You must use three significant digits to report the answer correctly, so it is M = 0.0409 M.