grupa 1

Question 1

ionul clorura+nitrat de argint

Answer 1

Cl‾ + AgNO3 = AgCl↓ + NO3
pp alb cazeos
AgCl + 2NH3 = [Ag(NH3)2]Cl
AgCl + 2Na2S2O3 = Na3[Ag(S2O3)2] + NaCl
AgCl + 2KCN = K[Ag(CN)2]
AgCl + 2KSCN = K[Ag(SCN)2]
AgCl + Na3AsO3 = Ag3AsO3↓ + 3NaCl
pp galben
AgCl + [H] = Ag↓ + HCl
2AgCl + Na2CO3 = 2Ag + CO2↑ + 2NaCl + ½O2↑

Question 2

ionul clorura+nitrat de bariu

Answer 2

NU precipita

Question 3

ionul clorura+acetat de plumb

Answer 3

2Cl‾ + Pb(CH3COO)2 = PbCl2↓ + 2CH3COO-
pp alb cristalin - prin fierbere, precipitatul se dizolvă complet, iar la răcirea soluţiei, clorura de plumb recristalizează sub formă de foiţe albe, strălucitoare
PbCl2 + HCl = HPbCl3 sau
PbCl2 + 2HCl = H2PbCl4

Question 4

ionul clorura+nitrat mercuros

Answer 4

2Cl‾ + Hg2(NO3)2 = Hg2Cl2↓ + 2NO3
pp alb(calomel)
Hg2Cl2 + 2NH3 = Hg↓ + HgNH2Cl↓+ NH4Cl

Question 5

ionul bromura+nitrat de Ag

Answer 5

Br‾ + AgNO3 = AgBr↓ + NO3
pp galbui cazeos
AgBr + 2NH3 = [Ag(NH3)2]Br
AgBr + 2KCN = K[Ag(CN)2] + KBr
AgBr + 2Na2S2O3 = Na3[Ag(S2O3)2] + NaBr
2AgBr + [H] = 2Ag↓ + ZnSO4 + 2HBr sub act luminii

Question 6

ionul bromura+nitrat de Ba

Answer 6

NU precipita

Question 7

ionul bromura+nitrat mercuros

Answer 7

2Br‾ + Hg2(NO3)2 = Hg2Br2↓ + 2NO3
pp galben
3Hg2Br2 + 16HNO3 = 6Hg(NO3)2 + 4NO↑ + 3Br2 + 8H2O
Hg2Br2 + 2Cl2 = Br2 + 2HgCl2

Question 8

ionul bromura+nitrat de plumb

Answer 8

2Br‾ + Pb(NO3)2 = PbBr2↓ + 2NO3
pp alb
PbBr2 + 2KBr =K2[PbBr4]

Question 9

ionul iodura+nitrat de Ag

Answer 9

I‾ + AgNO3 = AgI↓ + NO3
pp galben
AgI + 2NaCN = Na[Ag(CN)2] + NaI
AgI + 2Na2S2O3 = Na3[Ag(S2O3)2] + NaI
2AgI + Cl2 = 2AgCl↓ + I2 -sol rosu bruna
2AgI + Zn = 2Ag↓ + ZnI2 in m acid se descompune AgI

Question 10

ionul iodura+nitrat de Ba

Answer 10

NU precipita

Question 11

ionul iodura+nitrat mercuros

Answer 11

2I‾ + Hg2(NO3)2 = Hg2I2↓ + 2NO3
pp verde
Hg2I2 + 2I‾ = [HgI4]2-+ Hg↓
pp negru

Question 12

ionul iodura+clorura mercurica

Answer 12

2I‾ + HgCl2 = HgI2↓ + 2Cl‾
pp rosu
HgI2 + 2I‾ = [HgI4]2-