Question

At 25oC, 5.77 grams of chlorine gas dissolves in enough water to give 1.0 L of solution. What is the molarity of the solution? (Atomic weight: Cl = 35.45).

Answer 1

Step-by-step explanation:

Molarity is defined as the number of moles present in a liter of volume.

Mathematically, Molarity =
`\frac{\text{number of moles}}{volume}`

Also, we know that number of moles equal mass divided by molar mass.

Hence, we will calculate the number of moles of chlorine as follows.

No. of moles =
`\frac{mass}{\text{molar mass}}`

=
`(5.77 g)/(35.45 g/mol)`

= 0.162 mol

Therefore, molarity of the given solution will be calculated as follows.

Molarity =
`\frac{\text{number of moles}}{volume}`

=
`(0.162 mol)/(1 L)`

= 0.162 M

Thus, we can conclude that the molarity of given solution is 0.162 M.