Chemistry Solutions and separations

Question 1

Main keywords:-

Answer 1

filtration, crystallisation, sublimation, distillation or chromatography, Dissolving, Crystallizing (or Precipitating),evaporating,solubility,solution,solvent,solute,sieving,residue,filtrate

Question 2

Solute + solvent

Answer 2

Solute + Solvent = Solution

Question 3

what happens when no more sugar can dissolve?

Answer 3

when no more sugar can dissolve then it is saturated

Question 4

colder ……… solubility

Answer 4

decreased

Question 5

hotter …….. solubility

Answer 5

increased

Question 6

the solubility of gasses …… as the temperature …..

Answer 6

decreases,increases

Question 7

the solubility increases as the ……… of the solvent does

Answer 7

temperature

Question 8

the solubility of gasses decreases as we ……. the temperature

Answer 8

increase

Question 9

the definition of a residue pl

Answer 9

the solid that does not pass through the filter paper during flitr

Question 10

the definition of solute and an example pl

Answer 10

Solute =The substance that dissolves= Sugar

Question 11

the definition of solvent and example pl

Answer 11

Solvent= The liquid the substance dissolves in Water

Question 12

the definition of solution with expl pl

Answer 12

Solution =The liquid mixture of solute and solvent. Solutions are clear – you can see through them=Sugar water

Question 13

what’s the difference between soluble and insoluble?

Answer 13

Soluble= A substance that can be dissolved in a solvent. Salt is soluble in water
Insoluble=A substance that cannot be dissolved in a solvent. Sand is insoluble in water

Question 14

what is filtration?

Answer 14

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue)
the water passes through the filter paper (it becomes the filtrate)

Question 15

definition of a filtrate

Answer 15

the liquid that passes through the filter paper during filtration

Question 16

helpful phrases to revise

Answer 16

volume of the solution has decreased/solution becomes more concentrated

Question 17

what do u use evaporation for?

Answer 17

Evaporation is used to separate a soluble solid (i.e. a solid that dissolves) from a liquid. For example, copper sulfate is soluble in water – its crystals dissolve in water to form copper sulfate solution.

Question 18

what is distillation used for?

Answer 18

is a method for separating the solvent from a solution. water can be separated from salt solution by simple distillation.T. When the solution is heated, the water evaporates. It is then cooled and condensed into a separate container. The salt does not evaporate and so it stays behind.

Question 19

Melting point and boiling point:-

Answer 19

pure water boils at 100°C. If it contains any dissolved solids, like salt, its boiling point will be higher than 100°C. That is why salt is often added to water when cooking. The water boils at a higher temperature and so the food cooks more quickly.