Cation/anion Identification Reactions

Question 1

Ammonium- reagents+result?

Answer 1

Reagents- NaOH, gently heat

Result- ammonia gas, litmus blue

Question 2

Carbonate-reagents+results?

Answer 2

Reagents- HCl, limewater (calcium carbonate to test gas)

Result- effervescence, CO2 produced, cloudy limewater

Question 3

Sulfate-reagents+results?

Answer 3

Reagents-HCl then barium chloride

Result- White ppt

Question 4

Chloride (aq)- reagent+result?

Answer 4

Reagents-nitric acid, silver nitrate,
Results- White ppt, pp
Add dilute ammonia sol, ppt dissolves

Question 5

Chloride(solid)- reagents+results?

Answer 5

Reagents-conc H2SO4

Results- steamy fumes HCl

Question 6

Bromide (aq)- reagents+results?

Answer 6

Reagents-nitric acid, silver nitrate
Result-cream ppt
Add conc NH3 sol, ppt dissolves

Question 7

Bromide (solid)- reagents+results?

Answer 7

Reagents- conc H2SO4

Results- steamy fumes HBr, red/brown br2

Question 8

Iodide (aq)- reagents+results?

Answer 8

Reagents- nitric acid, silver nitrate

Results- yellow ppt

Question 9

Iodide (solid)- reagents+results?

Answer 9

Reagents- conc H2SO4

Results- steamy fumes HI, H2S gas (rotten egg smell), black solid iodine, sometimes yellow solid sulphur