EVERYTHING from notebook

Question 1

warming the mixture is always used to test for?

Answer 1

NH4+

Question 2

what gas are you testing for when you warm the mixture

Answer 2

NH3

Question 3

how do you test for NO-?

Answer 3

aluminium foil + NaOH + heat

Question 4

which nitrates are insoluble?

Answer 4

none

Question 5

which sulfates are insoluble?

Answer 5

Ba, Ca

Question 6

which halides are insoluble?

Answer 6

Ag

Question 7

which sulfides are insoluble?

Answer 7

all except group 1 compounds

Question 8

which carbonates are insoluble?

Answer 8

all except group 1 compounds

Question 9

which hydroxides are insoluble?

Answer 9

all except group 1 compounds and Ba(OH)2 and Ca(OH)2

Question 10

which oxides are insoluble?

Answer 10

all except group 1 compounds and BaO and CaO

Question 11

if there is green precipitate that turns brown on contact with air, what is the identified ion?

Answer 11

Fe2+

Question 12

if there is off-white precipitate that turns brown on contact with air, what is the identified ion?

Answer 12

Mn2+

Question 13

what is a pungent, brown gas?

Answer 13

NO2

Question 14

what is a pungent, pale green gas?

Answer 14

Cl2

Question 15

identify the gas that turns moist blue litmus paper red, then white.

Answer 15

Cl2

Question 16

identify the gas that turns moist blue litmus paper red, and KMnO4 from purple to colourless.

Answer 16

SO2

Question 17

what two things do you need to note in your observations when doing filtration?

Answer 17

1. colour of filtrate

2. colour of residue