Question

Ионы, которые Не могут существовать одновременно в растворе: 1) Cu2+ и OH- 2)K+ и CO3²- 3)Ag+ и Cl- 4) Ba²+ и CO3²- 5) Ca²+ и OH- 6) Ag+ и NO-3

Answer 1

1) Cu2+ и OH-
3)Ag+ и Cl-
4) Ba²+ и CO3²-

Answer 2

Ions that cannot coexist in solution:

The ions that cannot coexist in solution are:

1) Cu2+ and OH-: When Cu2+ ions are added to a solution containing OH- ions, a precipitation reaction occurs forming an insoluble copper hydroxide precipitate according to the net ionic equation: Cu2+ + 2OH- → Cu(OH)2 (s)

2) K+ and CO32-: When K+ and CO32- ions are both present, potassium carbonate precipitates out of solution according to the net ionic equation: K+ + CO32- → K2CO3 (s)

3) Ag+ and Cl-: Silver chloride is an insoluble salt that precipitates when Ag+ and Cl- ions are both present in solution, according to the net ionic equation: Ag+ + Cl- → AgCl (s)

4) Ba2+ and CO32-: Barium carbonate is an insoluble salt that precipitates when Ba2+ and CO32- ions are both present in solution, according to the net ionic equation: Ba2+ + CO32- → BaCO3 (s)

5) Ca2+ and OH-: Calcium hydroxide is an insoluble salt that precipitates when Ca2+ and OH- ions are both present in solution, according to the net ionic equation: Ca2+ + 2OH- → Ca(OH)2 (s)

6) Ag+ and NO3-: Silver nitrate and nitrate ions can coexist in the same solution as silver nitrate is highly soluble and does not precipitate out of solution.