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5 Cards in this Set
- Front
- Back
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Identifying Cations (+ve) |
•Sodium Hydroxide Solution ▷Zinc ◑White precipitate ◈Ppt dissolves in excess forming colourless solution ▷Aluminium ◑White precipitate ◈Ppt dissolves in excess forming colourless solution ▷Lead (II) ◑White precipitate ◈Ppt dissolves in excess forming colourless solution ▷Calcium ◑White precipitate ◈Ppt insoluble in excess ▷Copper (II) ◑Light blue precipitate ◈Ppt insoluble in excess ▷Iron (II) ◑Green precipitate ◈Ppt insoluble in excess ▷Iron (III) ◑Reddish brown precipitate ◈Ppt insoluble in excess ▷Ammonium ◑No precipitate (On heating, ammonia gas is given off. Moist Red litmus paper turn blue) ◈No change |
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Identifying Cations (+ve) |
Aqueous ammonia ▷Zinc ◑White precipitate ◈Ppt dissolves in excess forming colourless solution ▷Aluminium ◑White precipitate ◈Ppt insoluble in excess ▷Lead (II) ◑White precipitate ◈Ppt insoluble in excess ▷Calcium ◑No ppt ◈No ppt ▷Copper (II) ◑Light blue precipitate ◈Ppt dissolves in excess to form deep blue solution ▷Iron (II) ◑Green precipitate ◈Ppt insoluble in excess ▷Iron (III) ◑Reddish brown precipitate ◈Ppt insoluble in excess |
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Identifying Anions (-ve) |
▷Carbonate ion ◑Add dilute hydrochloric acid. Gas given off into limewater ◈Effervescence is observed. Gas given off forms white ppt. Carbon dioxide is given off. ▷Nitrate ion ◑Add sodium hydroxide then add a piece of aluminium foil. Warm the mixture. Test the hassle with moist Red litmus paper ◈Effervescence is formed. Moist Red litmus paper turns blue. Ammonia gas given off. ▷Sulfate ion ◑Add nitric acid, then Add barium nitrate solution ◈White ppt of barium sulfate formed ▷Chloride ion ◑Add nitric acid then Add silver nitrate solution ◈White ppt of silver chloride formed ▷Iodide ion ◑Add nitric acid and Add silver nitrate solution ◈Yellow ppt of iodide formed. |
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Identifying gases |
▷Hydrogen (Colourless & odourless) ◑Lighted splint at mouth of test tube ◈Extinguish with 'pop' sound ▷Oxygen (Colourless & Odourless) ◑Insert glowing split into test tube ◈Glowing splint rekindled ▷Carbon dioxide (Colourless & Odourless) ◑Bubble gas through limewater ◈White ppt formed. Ppt dissolves upon further bubbling ▷Chlorine (Greenish-yellow & pungent gas) ◑Place moist blue litmus at mouth of test tube ◈Moist blue litmus turns red then bleached ▷Sulfur dioxide (Colourless & pungent gas) ◑Place filter paper soaked with acidified potassium manganate (VII) at mouth of test tube. ◈Purple acidified potassium manganate (VII) turns colourless ▷Ammonia (Colourless & pungent gas) ◑Place moist red litmus paper at mouth of test tube ◈Moist red litmus paper turns blue |
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Tests for Water |
▷Heat sample in test tube. Place piece of cobalt (II) chloride at mouth of test tube ◇Cobalt (II) chloride paper changes from blue to pink. ▷Add few drops of sample to some anhydrous copper (II) sulfate ◇Anhydrous copper (II) sulfate changes from white to blue |
