ions

Question 1

nitrate ion

Answer 1

Question 2

carbonate ion

Answer 2

CO₃²⁻

Question 3

sulfate ion

Answer 3

SO₄²-

Question 4

hydroxide ion

Answer 4

OH-

Question 5

ammonium ion

Answer 5

Question 6

zinc ion

Answer 6

Question 7

silver ion

Answer 7

Ag+

Question 8

charge of a transition metal ion

Answer 8

2+

Question 9

nitrile ion

Answer 9

Question 10

hydrogen carbonate ion

Answer 10

Question 11

sulphite ion

Answer 11

Question 12

dichromate ion

Answer 12

Question 13

phosphate ion

Answer 13

Question 14

nitrite vs nitrate

Answer 14

nitrite: NO2-
nitrate: NO3-

Question 15

sulfide, oxide, bromide

Answer 15

monatomic ion just him alone

Question 16

what are halogens good at

Answer 16

oxidation, mafia 💪🏾 lots of taking not giving

Question 17

what silver compound forms as a black precipitate

Answer 17

silver sulfide Ag2S
it’s a black coating in the surface of silver

Question 18

how do you do the electron configuration of an ion

Answer 18

do the normal configuration first to make sure that you remove 4s before 3d!

Question 19

why would you use a lower concentration of the thing in the burette in a titration

Answer 19

to lower percentage uncertainty

Question 20

what can react with a carbonate to create bubbles

Answer 20

any acid!

Question 21

how do you know how many isomers are possible in a compound

Answer 21

2 to the power of however many chiral centres there are

Question 22

how do you work out how much water needs to be added to a known volume and concentration of something to reach a different concentration

Answer 22

use vol and conc to find the moles
do the moles divided by the wanted conc to get the total vol at that conc
do needed minus current vol to know how much water to add

Question 23

what’s useful and good for mark schemes in any equation question

Answer 23

writing out rearranged equations

Question 24

what is important when purifying a substance that is in a mixture with acids

Answer 24

neutralise! eg. with Na2CO3

Question 25

what’s in a half equation for oxidation vs reduction

Answer 25

oxidation
element —> positive ion and e-

reduction
positive ion + e- —> element

Question 26

when is the shape square planar

Answer 26

when there are 4 atoms attached to the central atom and two lone electron pairs

Question 27

what compound is used as a standard for NMR shift measurements

Answer 27

tetramethylsilane
Si(CH3)4

Question 28

what is the formula of ammonia

Answer 28

NH3

Question 29

what is the formula of the ammonium ion

Answer 29

NH4+

Question 30

can UV radiation be beneficial
for the environment

Answer 30

yes it can cause some polymers to photodegrade and this benefits the environment

Question 31

what is the bond angle in a square planar molecule

Answer 31

90 degrees!