Question

A 10.00 ml sample of an aqueous solution of calcium hydroxide is neutralized by 20.00 ml of 0.02000 m hno3(aq. what is the molarity of the calcium hydroxide solution?

Answer 1

Answer: Molarity of Calcium Hydroxide solution is 0.04M.

Explanation: We are given 10.00 mL of Calcium hydroxide solution which is neutralized by 20.00 mL of 0.02M of
`HNO_3` solution.

To find out the molarity of calcium hydroxide, we use the formula:

`M_1V_1=M_2V_2`

`M_(Ca(OH)_2)* V_(Ca(OH)_2)=M_(HNO_3)* V_(HNO_3)`

Putting the values in above equation, we get

`M_(Ca(OH)_2)* 10=0.02* 20`

`M_(Ca(OH)_2)=0.04M`

Answer 2

The chemical reaction would be as follows:

Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O

We are given the concentrations and volumes of the substances. We use these values and the relationships to calculate the molarity of the Ca(OH2).

0.02 mol HNO3 / L (.02 L) ( 1 mol Ca(OH)2 / 2 mol HNO3 ) = 0.0002 mol Ca(OH)2

Molarity = 0.0002 / 0.010 = 0.02 M Ca(OH)2