In text questions page number 18
1. Differentiate between homogeneous and heterogeneous mixtures with examples.
|Homogeneous Mixtures ||Heterogeneous Mixtures |
|1. Homogeneous mixtures have uniform composition. ||1. Heterogeneous mixtures have non uniform composition |
|2. It has no visible boundaries of separation between its constituents. ||2. It has visible boundaries of separation between its constituents. |
|3. Some examples of homogeneous mixtures are: salt in water, sugar in water. ||3. Some examples of heterogeneous mixtures are: water and sand, oil and water. |
2. How are sol, solution and suspension different from each other?
|Sol(Colloidal solution) ||Solution ||Suspension |
|1.They are heterogeneous in nature ||1.They are homogeneous in nature ||1.They are heterogeneous in nature |
|2. They scatter a beam of light and hence show Tyndall effect. ||2. They do not scatter a beam of light and hence do not show Tyndall effect. ||2. They do not scatter a beam of light and hence do not show Tyndall effect. |
|3. They are quite stable ||3. They are very stable ||3. They are unstable |
|4. Examples of sol are: milk, blood smoke etc. ||4. Examples of solution are: salt in water, sugar in water. ||4. Examples of suspension are: sand in water, dusty air |
3. To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature.
Mass of solute (sodium chloride) =36g
Mass of solvent (water) =100g
Mass of solution = Mass of Solute + Mass of solvent
= 36g +100g = 136g