BOTH P1+2 2h chemical tests

Question 1

lithium flame test

Answer 1

red

Question 2

sodium flame test

Answer 2

bright yellow

Question 3

what is the hydrogen test

Answer 3

lit splint

Question 4

what is the test for oxygen?

Answer 4

glowing splint test

Question 5

what is the result for the oxygen test?

Answer 5

it will relight the splint

Question 6

what is the result of the hydrogen test?

Answer 6

it will make a squeaky pop sound

Question 7

what is the test for carbon dioxide gas?

Answer 7

limewater

Question 8

what is the result of the carbon dioxide test?

Answer 8

turns colourless to cloudy / milky

Question 9

what is the test for ammonia gas?

Answer 9

damp red litmus paper

Question 10

what is the result of the ammonia test?

Answer 10

turns blue

Question 11

what is the chlorine (gas) test?

Answer 11

damp blue litmus paper

Question 12

what is the result for the chlorine test?

Answer 12

paper turns white, it bleaches it

Question 13

what is the potassium flame test?

Answer 13

lilac

Question 14

what is the calcium flame test?

Answer 14

orange-red

Question 15

what is the copper 2+ flame test?

Answer 15

blue-green

Question 16

all nitrates are…?

Answer 16

soluble

Question 17

common chlorides are…?

Answer 17

soluble

Question 18

common sulphates are…?

Answer 18

soluble

Question 19

common carbonates are…?

Answer 19

insoluble

Question 20

what are the 2 exceptions for chlorine…?

Answer 20

lead chloride and silver chloride are insoluble

Question 21

what are the three exceptions for sulphates…?

Answer 21

lead, barium and calcium sulphate are insoluble

Question 22

what are the exceptions for carbonates…?

Answer 22

sodium, potassium and ammonium salts are soluble

Question 23

how do you test for halide ions or anions?

Answer 23

add dilute nitric acid followed by silver nitrate solution

Question 24

what colour precipitate will chloride form?

Answer 24

white

Question 25

what colour precipitate will bromide form?

Answer 25

cream

Question 26

what colour precipitate will iodine form?

Answer 26

yellow

Question 27

how do you test for sulphate ions?

Answer 27

add dilute nitric acid, then barium chloride

Question 28

what colour precipitate will sulphate ions from if present?

Answer 28

white

Question 29

how do you test for water?

Answer 29

add anhydrous copper sulphate

Question 30

what is the result of the test for water?

Answer 30

the anhydrous copper sulphate will turn blue, and blue crystal's will form

Question 31

does the anhydrous copper sulphate test for pure water?

Answer 31

no, it only tests for water presents | to test for pure water check boiling and freezing temps

Question 32

how do you test for transition metal ions or cations?

Answer 32

adding sodium hydroxide solution

Question 33

what colour precipitate will form is iron (II) is present?

Answer 33

green

Question 34

what colour precipitate will form is iron (III) is present?

Answer 34

red/brown

Question 35

what colour precipitate will form is copper is present?

Answer 35

blue

Question 36

what happens to ammonium when testing for cations?

Answer 36

when gently warming it will give off ammonia gas

Question 37

how do you calculate heat energy?

Answer 37

Q = m x c x change in temp - c is specific heat capacity - m is mass - q is heat transferred

Question 38

how do you test for carbonate (CO3 2-)?

Answer 38

add dilute acid and test the gas released