Salts and solubility

=Activity No # 1 - Name of Activity= salts and solubility

Estimated Time
5mint

Materials/ Resources needed

 * computer,
 * screen,
 * electricity,
 * projector.

Prerequisites/Instructions, if any
observe the solubility of salts carefully.

Multimedia resources
PhET

Website interactives/ links/ simulations
file:///opt/PhET/en/simulations/category/new.html

Process (How to do the activity)

 * 1) Click the “tap” to pour the water and take required amount of water.
 * 2) Click “table salt” button.
 * 3) Click and Shake the “bottle” to add little amount of sodium chloride salt.
 * 1) Observe the solubility of salt in water. In the next step click the “reset all”botton.  Then click the bottle to add mercuric bromide salt.  Again observe the solubility.

Developmental Questions (What discussion questions)

 * 1) what are the basic needs of living being?
 * 2) Name the sources of water?
 * 3) which source of water is suitable for domestic purpose?
 * 4) Ocean or sea water is not suitable for this purpose. why?
 * 5) Sea water is salty. Why?
 * 6) What happened when sodium chloride is added to water?
 * 7) What happened when Mercuric chloride is added to water?
 * 8) Between two salts which dissolves faster?

Evaluation (Questions for assessment of the child)

 * 1) What is the chemical name and molecular formula of common salt?
 * 2) Name the elements present in common salt ?

Question Corner
To link back to the topic page the link of the page name from where activity was given''' Back
 * 1) Name the universal solvent? Why?