science - substances

Question 1

during chromatography why do colours spread up the paper

Answer 1

the colours are soluble and are spread by the water

Question 2

what does insoluble mean

Answer 2

it does not dissolve

Question 3

do substances dissolve at different speeds in different liquids

Answer 3

yes

Question 4

in chromatography why do you draw the starting line in pencil

Answer 4

so the experiment is not effected by the line dissolving

Question 5

what is a saturated solution

Answer 5

where no more solid can be dissolved in the liquid

Question 6

if you heat a solution of water and sugar does it speed up or slow down the reaction..and why

Answer 6

speeds up because it adds energy

Question 7

what is a solute

Answer 7

a solid that can be dissolved in a liquid

Question 8

whats is a solvent

Answer 8

a liquid that dissolves something

Question 9

what is filtration

Answer 9

a way of separating a sold from a liquid

Question 10

what is a mixture

Answer 10

when two substances are mixed but dont react so can be easily separated

Question 11

what is a solution

Answer 11

a special mixture that is made when a solid dissolves into a liquid

Question 12

10g of sugar and 10g of water - how much does the solution weigh when the sugar is dissolved

Answer 12

20g

Question 13

how do you work out solubility of a substance

Answer 13

the mass of a substance that will dissolve in 100cm of water at 20c