Experiments and tests

Question 1

some cations produce a what when added to solutions of sodium _____ and _______

Answer 1

produce a ppt

Question 2

ionic equation for cation reaction in sodium hydroxide and ammonia

Answer 2

Metal ion+ + OH- —-> metal ion hydroxide

Question 3

the what of the ppt can be use to determined the cation

Answer 3

colour

Question 4

some cations show a _____ _______

Answer 4

coloured flame

Question 5

lithium flame colour

Answer 5

crimson/ red

Question 6

sodium flame colour

Answer 6

yellow

Question 7

calcium flame colour

Answer 7

red

Question 8

potassium flame colour

Answer 8

lilac

Question 9

copper flame colour

Answer 9

green-blue

Question 10

barium flame colour

Answer 10

greem

Question 11

when doing a flame test what do you need to do to the wire between each use?

Answer 11

clean it with HCl

Question 12

a lit splint ____ with ________

Answer 12

pops, hydrogen

Question 13

a glowing splint ________ with ______

Answer 13

relights, oxygen

Question 14

what is SO2?

Answer 14

sulfur dioxide

Question 15

what does SO2 decolourise?

Answer 15

aqueous potassium manganate (VII)

Question 16

what is NH3

Answer 16

ammonia

Question 17

NH3 makes damp litmus paper go from _____ to _____

Answer 17

red to blue

Question 18

what is Cl2

Answer 18

Chlorine

Question 19

Cl2 does what to damp litmus paper?

Answer 19

bleaches it

Question 20

test for CO2

Answer 20

turns lime water milky

Question 21

how to identify a halide ion

Answer 21

they produce a ppt when added to silver nitrate

Question 22

test for sulfate anions

Answer 22

white ppt when added to barium nitrate

Question 23

test for sulfite anion

Answer 23

decolourises aqueous potassium manganate (VII)

Question 24

how to identify nitrate anions

Answer 24

produce ammonia when heated with sodium hydroxide and aluminium foil

Question 25

how do identify carbonate anions

Answer 25

they release CO2 when added to dilute acid