Question

Calculate the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L. Please show work!

Answer 1

Answer: The concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

`Molarity=(n)/(V_s)`

where,

n = moles of solute

`V_s` = volume of solution in L

moles of
`Ca(OH)_2` =
`\frac{\text {given mass}}{\text {Molar mass}}=(13.0g)/(74g/mol)=0.18mol`

Now put all the given values in the formula of molality, we get

`Molarity=(0.18)/(5.0L)=0.036M`

Therefore, the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M