C2 - shit from gizmo idk

Question 1

describe a mixture in terms of their melting point

Answer 1

-wild melting range
-temperature varies during melting

Question 2

what is a cation

Answer 2

a positive ion

Question 3

what is an anion

Answer 3

a negative ion

Question 4

describe the temperature gradient in a fractionating column

Answer 4

hottest at the bottom, coolest at the top

Question 5

what is a volatile component also known as?

Answer 5

a component with a low boiling point

Question 6

what is the molar equation for mass?

Answer 6

relative formula mass x moles = mass

Question 7

what is the equation for volume of gas?

Answer 7

moles * 24

Question 8

what is the avogadro’s constant equation?

Answer 8

number of moles = number of atoms / avogadro’s constant

Question 9

define a formulation

Answer 9

a mixture formed by mixing together several different substances in carefully measured quantities

Question 10

describe diamond

Answer 10

-giant covalent structure (carbon atoms)
-each atom bonded to 4 other atoms
-very rigid
-no free electrons

Question 11

describe graphite

Answer 11

-layers of carbon atoms (weakly bonded)
-each carbon atom bonds to 3 other atoms
-soft + slippery
-conducts electricity
-good lubricant

Question 12

what do acids react with?

Answer 12

metals

Question 13

what does neutralisation do?

Answer 13

-produces water and a salt
-releases heat energy
-reduces corrosiveness of original substances

Question 14

name 2 acids

Answer 14

hydrochloric acid and sulfuric acid

Question 15

name 2 bases

Answer 15

ammonia and calcium carbonate