Chemical tests

Question 1

what are anions

Answer 1

negative ions

Question 2

what are cations

Answer 2

positive ions

Question 3

in a flame test what colour does potassium go (k+)

Answer 3

lilac

Question 4

flame test colour for sodium (na+)

Answer 4

yellow/orange

Question 5

flame test colour for lithium(li+)

Answer 5

red

Question 6

flame test colour for calcium (Ca2+)

Answer 6

brick red

Question 7

for halides what is added

Answer 7

silver nitrate {agno3(aq)}

nitric acid {hno3(aq)}

Question 8

what is test for hydrogen

Answer 8

squeaky pop

Question 9

test for o2

Answer 9

relights a glowing splint

Question 10

test for chlorine (cl2)

Answer 10

bleaches litmus paper

Question 11

test for ammonia (nh3)

Answer 11

turns red litmus paper blue

Question 12

test for co2

Answer 12

turns limewater cloudy

Question 13

test for h20

Answer 13

physical test boil to 100 degrees

chem- copper sulfate (cuso4)

Question 14

what does iron II (fe2+) form

Answer 14

green ppt

Question 15

what does iron III (fe3+) form

Answer 15

brown ppt

Question 16

what does copper (Cu2+) form

Answer 16

blue

Question 17

what colour does sulfate (so42-) go to

Answer 17

white ppt

Question 18

what colour does chlorine cl- go

Answer 18

white ppt

Question 19

what colour does br- go

Answer 19

cream

Question 20

what colour does iodine (i-) go

Answer 20

yellow