solutions and suspensions

Question 1

what can mixtures be classified into

Answer 1

homogenous and heterogenous

Question 2

what is a homogenous mixture

Answer 2

consists of two or more components that mix well with each other

Question 3

what is a solution

Answer 3

a mixture of one substance dissolved in another so the properties are the same throughout. A mixture is composed of a solute and the solvent

Question 4

what is a solute

Answer 4

the substance being dissolved

Question 5

what is the solvent

Answer 5

the part of the solution that does the dissolving

Question 6

what is a dilute solution

Answer 6

only a small amount of solute compared to solvent

Question 7

what is a concentrated solution

Answer 7

a relatively large amount of solute to solvent

Question 8

what is a saturated solution

Answer 8

refers to the maximum amount of solute dissolved at a given temperature

Question 9

what is solubility

Answer 9

the solubility of a solute is the maximum quantity of solute that can dissolve in a certain quantity of solvent or quantity of solution at a specified temperature

Question 10

what are the main factors that affect solubility

Answer 10

-the nature of the solute
-the nature of the solvent
-the physical state of the solute
-temperature

Question 11

what is rate of dissolving

Answer 11

the rate of dissolving is a measure of how fast a substance dissolves

Question 12

what are some factors that determine how fast a substance dissolve

Answer 12

-size of particles
-when a solute dissolves, the action only takes place at the surface of each particle. when the total surface area of the solute particles is increased, the solute dissolved more rapidly
-amount of solute already dissolved
-when there is already little solute in the solution, dissolving takes relatively rapidly. as the solution approaches the point where no solute can be dissolved, dissolving takes place more slowly
-temperature
-for liquids and solids solutes, increasing the temperature would not only increase the amount of solute that will dissolve but also increases the rate at which the solute will dissolve. For gases, it is the reverse

Question 13

what is a solubility chart

Answer 13

the solubility curve shows the _ grams of solute in a saturated solution containing 100g of water at a certain temperature

Question 14

what is a heterogeneous mixture

Answer 14

heterogenous mixtures consists of two or more components that do not mix well with each other

Question 15

what are suspensions

Answer 15

a suspension is a mixture in which insoluble particles are suspended in a liquid or gas

Question 16

solution vs suspension (memorise at least 2??)

Answer 16

solution
-it is clear as light can pass through it
-it is a homogenous mixture
-solute does not separate from solvent
-when filtered, no residual particles retain on the filter paper

suspension
-cloudy as light cannot pass through it
-heterogenous mixture
-insoluble particles will float on top or settle to the bottom
-left behind on the filter paper as residue when the suspension is filtered