Finding the Solubility of Ca(OH)2

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Finding the Solubility of Ca(OH)2

Aim:

----

To determine the solubility of Ca(OH)2.

To carry out the aim of this experiment an experiment needs to be

planned and carried out. I am given the information that the

solubility of the Ca(OH)2 is between 1 to 1.5g per dm3. Also I am

given a standard solution of 1M hydrochloric acid (HCl) which may have

to be diluted to suit the measuring needs of the experiment.

Apparatus:

[IMAGE]

* 1g of Ca(OH)2.

* Pipette 25cm3

* 2 x 500cm3 beaker

* Conical flask 250cm3

* Burette

* White tile

* Burette stand

* Stand

* Indicator

* 300cm3 of Hydrochloric acid- standard solution (concentration of

0.05M)

* Distilled water

* Filter Paper

* Stirring rod

* Funnel

Method:

* Add 1g of Ca(OH)2 to 300cm3 of distilled water in a 500cm3 beaker.

Keep stirring the solution till the solid stops dissolving. This

leaves a saturated solution.

* Filter off the excess solid into another 500cm3 beaker using a

damp filter paper (distilled water).

* Repeat the filtration of the solution till there is no solid left.

Making sure to stir the solution in between the filtrations and

clean out the other beaker with plenty of water.

* This should leave 300cm3 of Ca(OH)2 saturated solution which will

be used in the titration experiment needed to find the

concentration of the solution.

* Use some of the Ca(OH)2 to rinse out the conical flask and the

pipette. Use some HCl to rinse out the burette.

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