Chem 107 Qualitative

Front 1

Fe(OH)2

Back 1

red/brown

Front 2

(Al(OH)4)^-

Back 2

colorless

Front 3

ZnS

Back 3

white

Front 4

Zn(OH)2

Back 4

white

Front 5

(Fe(SCN))^2+

Back 5

red/brown

Front 6

(Zn(NH3)4)^2+

Back 6

colorless

Front 7

PbI2

Back 7

yellow

Front 8

Ag2CrO4

Back 8

brown/red

Front 9

Ag2O

Back 9

brown/red

Front 10

(Ag(S2O3)2)^-3

Back 10

colorless

Front 11

PbCrO4

Back 11

yellow

Front 12

Hg2Cl2

Back 12

white

Front 13

BaCrO4

Back 13

yellow

Front 14

CaC2O4

Back 14

white

Front 15

Ba^2+

Back 15

colorless

Front 16

Ca(OH)2

Back 16

white

Front 17

CaCO3

Back 17

white

Front 18

BaC2O4

Back 18

white

Front 19

Ag2S

Back 19

black

Front 20

BaCO3

Back 20

white

Front 21

Ag3PO4

Back 21

yellow

Front 22

Br2(aq)

Back 22

red/brown

Front 23

BaSO3

Back 23

white

Front 24

(Fe(NO))^2+

Back 24

brown/red

Front 25

You add HCl, there is a white ppt. You heat it in boiling water, ppt disappears. Add K2CrO4 and a yellow ppt forms. What is the ion?

Back 25

Pb^2+

Front 26

You add HCl, there is a white ppt, you decant and add NH3 to the ppt. A black ppt forms. What is the ion?

Back 26

Hg^2+

Front 27

You add HCl, there is a white ppt. You decant and add NH3 (no ppt) then add HNO3 until it is acidic. A white ppt forms. What is the ion?

Back 27

Ag^+

Front 28

You add NH3 and decant. Add (NH4)2S to the supernatant. A white ppt forms. What is the ion?

Back 28

Zn^2+

Front 29

You add NH3, decant, and add NaOH to the ppt. You decant and add HCl until acidic. You then add NH3 until basic. A ppt forms. What is the ion?

Back 29

Al^3+

Front 30

You add NH3, decant, and add NaOH to the ppt. You decant and add HCl and water to the ppt. It dissolves and you add KSCN. A red ppt forms. What is the ion?

Back 30

Fe^3+

Front 31

You add (NH4)2CO3 and ppt forms. You decant supernatant onto watch glass to make it more concentrated. You then clean the nichrome wire with HCL and do a flame test to the solution. A purple flame appears. What is the ion?

Back 31

K^+

Front 32

You add (NH4)2CO3 and ppt forms. You add water and CH3COOH until the ppt dissolves. You then buffer with NH4CH3COO. You then add K2CrO4 and a yellow ppt forms. You decant and add HCl to ppt until it dissolves. You add Na2SO4 and a white ppt forms. What is the ion?

Back 32

Ba^2+

Front 33

You add (NH4)2CO3 and ppt forms. You add water and CH3COOH until the ppt dissolves. You then buffer with NH4CH3COO. You then add K2CrO4 and the soln turns yellow. You add K2C2O4 and then NH3 until the soln is basic. A white ppt forms. You decant and add HCl to the ppt until it dissolves. You add Na2SO4 and no ppt forms. What is the ion?

Back 33

Ca^2+

Front 34

You add NaOH and place a moist pH strip over the test tube. A green circle forms on the strip over the mouth of the test tube. What is the ion?

Back 34

NH4^+

Front 35

You add HNO3 and AgNO3. A black ppt forms. What is the ion?

Back 35

S^2-

Front 36

You add NH3 and BaCl2 and a ppt forms. You add a drop of HCl which slides down the test tube and makes the ppt bubble. What is the ion?

Back 36

CO3^2-

Front 37

You add NH3 and BaCl2 and a ppt forms. You add HCl to the ppt and nothing happens. There is still a ppt. What is the ion?

Back 37

SO4^2-

Front 38

You add NH3 and BaCl2 and a ppt forms. You add HCl to the ppt and the ppt dissolves. You add Bromine wather and a white ppt forms. What is the ion?

Back 38

SO3^2-

Front 39

You add a mixture of (NH4)2MoO4 and HNO3. A little bit of yellow ppt forms. After heat is applied, more ppt forms. What is the ion?

Back 39

PO4^2-

Front 40

You add HCl and Chlorine water. The soln becomes brown. You add hexane and violently mix. The hexane that rises to the top of the soln is purple. What is the ion?

Back 40

I^-

Front 41

You add HCl and Chlorine water. The soln becomes brown. You add hexane and violently mix. The hexane that rises to the top of the soln is purple. You add Chlorine water until the purple is gone and the hexane is now brown. What is the ion besides I^-?

Back 41

Br^-

Front 42

You add HCl and Chlorine water. The soln becomes brown. You add hexane and violently mix. The hexane that rises to the top of the soln is brown. What is the ion?

Back 42

Br^-

Front 43

You add HNO3 and AgNO3. A ppt forms. You decant and add more HNO3. You decant and wash and add NH3 to the ppt and violently mix. You add HNO3 until the soln is acidic a white ppt forms. What is the ion?

Back 43

Cl^-

Front 44

You add H2SO4. You add 18 F H2SO4 and the soln becomes hot. You add a mixture of FeSO4*7H2O and Water. A brown ppt ring forms. What is the ion?

Back 44

NO3^-

Front 45

In experiment 4, if you had to heat the solution to evaporate a certain ion in the solution, what ion was being evaporated?

Back 45

S^2-

Front 46

If you add NH3 and BaCl2 and no ppt forms, what ions are absent?

Back 46

SO4^2-,SO3^2-,CO3^2-,PO4^3-

Front 47

If you add HNO3 and AgNO3 and no ppt forms, what ions are absent?

Back 47

S^2-,Cl^-,Br^-,I^-