2.
uestions
1. Diferentiate between homogen
eous and heterogeneous mixtures
with examples,
2. How are sol, solution and
suspension different from each
other?
3. To make a saturated solution,
36g of sodium chloride is dissolved
in 100 g of water at 293 K
Find its concentration at this
temperature
Answers
HERE'S UR ANS DEAR......
1. (a) Homogeneous mixture =
- The particles appear smaller in size
- These are pure substances
- They represent same physical properties
(b) Heterogeneous mixture =
- The particles are either smaller or larger in size
- These are not pure substances
- They do not possess same physical properties
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2. SOLUTION:
1.Homogenous mixture.
2.Particles are smaller than 1 nm ,they are not visible to naked eye.
3.They do not scatter a beam of light.
4. Solute particles cannot be separated by the process of filtration and sedimentation.
SOL:
1.Heterogenous mixtures.
2.The size of the particles is to small to seen by naked eye.
3.They scatter a beam of light passing through them.
4.Solute particles cannot be separated by the process of filtration and sedimentation.
SUSPENTION:
1.Heterogeneous mixtures.
2.Particles are visible to naked eye.
3.They scatter a beam of light passing through them.
4.Solute particles can be separated by the process of filtration and sedimentation.
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3. Mass of solute (sodium chloride) =36g
Mass of solvent (water) =100g
Mass of solution = Mass of Solute + Mass of solvent
= 36g +100g = 136g
concentration = mass of solute / mass of solvent × 100
so , concentration = 36grm/136grm ×100
=26.47 %
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Answer:
Explanation:
1. Homogeneous mixtutes:-
These mixtures contains particles that are identical . It has the same uniform appearance and composition throughout it's mixture.
Example:- salt and sugar, sand , salt or sugar water.
Heterogeneous mixtures:-
These mixtures contains particles that are different in their composition and may have a different appearance. These are not always different in their appearance since, milk is also a heterogeneous mixture but if we look at it we might not be able to differentiate it. After checking their composition under a microscope, only then you can come to conclusion.
Examples:- oil and water, sand in water, blood
2 . Sol :- It is a colloid in which the particles are solid and the dispersion medium (solvent in homogeneous mixture means the same as the dispersion medium in a colloidal substance) is fluid. It is a heterogeneous mixture whose particles are between 10^-6 to 10^-9 m.
Solution:- The substance in which the solute(which is present in less amount in a solution) is dissolved is called as the solution. It is a homogeneous mixture. The particles same sized or less that 10^-9 m.
Suspension:- It is a heterogeneous mixture in which the particles are large or greater than 10^-6 enough compared to the solvent size and doesn't get mixed up and thus settle at the bottom. This is called as the suspension.
3. Given,
solute = 36g -sodium chloride (Nacl)
solvent = 100 g - water( H2O)
temperature 293 k.
concentration=
solution= solute + solvent
= 100+36g = 136g
= 900/34
=26.47%
With rise in temperature solubility increase and with decrease in temperature solubility decreases.
As they have asked us to find out with the same given temperature. we need not consider the temperature of the solution.
Hope this helps.