E. Answer the following questions. 1. Why do solids have a fixed shape and a definite volume?
2. Briefly describe an activity to show that pure water is a transparent liquid.
3. Describe an activity to show that a solid can diffuse slowly into a liquid.
4. What is a 'saturated solution'? How can one prepare a saturated solution of common salt in water?
5. Suggest one activity to show the effect of temperature on the solubility of a solid in water.
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Answer 1) Solids have a definite volume and shape because particles in a solid vibrate around fixed locations. Strong attractions between the particles in a solid restrict their motion, keeping them in a place.
Answer 4) Adding sugar to water until it no longer dissolves creates a saturated solution. Continuing to dissolve solve in water until it will no longer dissolve creates a saturated solution.
Answer 5) Take a concentrated solution of common salt in water. Heat this solution for some time. After that you can easily dissolve and other spoonful of salt in thus solution. This shows that increase in temperature increase the solubility of a solid in water.
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HERE IS YOUR ANSWER MATE
1. SOLID HAS A FIXED VOLUME AND SHAPE BECAUSE OF PARTICLE IN A SOLID VIBRATE IN AROUND FIXED LOCATION AND STRONG INTERMOLECULAR SHAPE BETWEEN THEM
2. WATER HAVE NO COLOUR, IT IS COLOURLESS, WATER IS NOT OPAQUE ANOTHER PROPERTIES ARE LIGHT OR PHOTONS ARE EASILY VISIBLE IN WATER
3. HERE IS A SALT OR SUGAR SOLUTION WHICH SHOWS THAT SUGAR OR SALT DIFFUSES SLOWLY WHEN WE NOT STIRRED THEM
4. SATURATED SOLUTION IS A SOLUTION WHICH IT ATTAINS MAXIMUM AMOUNT OF SOLUTE IN SOLUTION TO DISSOLVE IN IT
5. SOLID DISSOLVED IN WATER IT'S INCREASING SOLUBILITY WITH RISE IN TEMPERATURE
HOPE THIS HELPS YOU DEAR
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