Colours year 12

Question 1

chlorine in cyclohexane

Answer 1

yellow

Question 2

bromine in cyclohexane

Answer 2

brown

Question 3

bromine in cyclohexane

Answer 3

brown

Question 4

iodine in cyclohexane

Answer 4

deep pink

Question 5

chloride colours and solubility when silver nitrate, then again ammonia then convert ammonia

Answer 5

white ppt that dissolves in dilute Ammonia

Question 6

bromide colours and solubility when silver nitrate, then again ammonia then convert ammonia

Answer 6

cream ppt that dissolves in concentrated ammonia

Question 7

iodide colours and solubility when silver nitrate, then again ammonia then convert ammonia

Answer 7

yellow ppt that is insoluble

Question 8

all nitrates are….

Answer 8

soluble

Question 9

all sodium potassium band ammonium salts are….

Answer 9

soluble

Question 10

all chlorides are….

Answer 10

soluble apart from silver and lead

Question 11

all sulfates are soluble except……

Answer 11

barium, calcium, silver and lead

Question 12

all carbonates are insoluble except…..

Answer 12

sodium, potassium and ammonium carbonates

Question 13

calcium carbonate

Answer 13

caco3

Question 14

how to test for carbonates

Answer 14

add HCl so co2 forms then use limewater

Question 15

how to test for sulfates

Answer 15

add HCl and barium chloride solution

if you get a white ppt it will be barium sulfate as it’s insoluble

Question 16

ammonia tests

Answer 16

damp red litmus turns blue

to see if there are ammonium ions add sodium hydroxide and warm the mixture. if ammonium is given off its in the substance