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21 Cards in this Set
- Front
- Back
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Al 3+ - effect of aqueous NaOH and of aqueous NH4? |
-White precipitate, soluble in excess giving a colourless solution -White precipitate, insoluble in excess. |
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NH4+ - effect of aqueous NaOH? |
-Ammonia produced in warming. |
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Ca2+ - effect of aqueous NaOH and of aqueous NH4? |
-White precipitate, insoluble in excess. -No precipitate or very slightly white precipitate. |
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Cu2+ - effect of aqueous NaOH and of aqueous NH4? |
-Light blue precipitate insoluble in excess -Light blue precipitate soluble in excess, giving a dark blue solution |
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Fe2+ - effect of aqueous NaOH and of aqueous NH4? |
-Green precipitate insoluble in excess -Green precipitate, insoluble in excess |
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Fe3+ - effect of aqueous NaOH and of aqueous NH4? |
-Red-brown precipitate insoluble in excess -Red-brown precipitate insoluble in excess |
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Zn2+ - effect of aqueous NaOH and of aqueous NH4? |
-White precipitate, soluble in excess, giving a colourless solution -White precipitate, soluble in excess, giving a colourless solution |
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CO3- Test and result? |
-Add dilute acid: Effervescence, CO2 produced |
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Cl-Test and result? |
-Acidify with dilute nitric acid, then add aqueous silver nitrate: White precipitate |
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I-Test and result? |
-Acidify with dilute nitric acid, then add aqueous silver nitrate: Yellow precipitate |
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NO3-Test and result? |
-Add aqueous sodium hydroxide, the aluminium foil, warm carefully: Ammonia produced |
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SO4-Test and result? |
-Acidify, then add aqueous barium nitrate: White precipitate |
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When is : Titration used? Neutralisation used? Precipitation used? |
-Acid + Alkali -Acid + Metal Acid + Insoluble Acid + Carbonate -2 soluble salts as reactants |
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When Cu is with CO3 vs as an ion (colours)? |
-With CO3: Green -As an ion: Blue |
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Flame Test: Lithium? Sodium? Potassium? Calcium? Barium? Copper? |
-Red -Orange -Lilac (pink) -Orange-red -Pale green -Blue-green |
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Which ions are soluble? |
Na+ K+ NH4+ NO3- Cl- EXCEPT AgCl and PbCl2 SO4 2- EXCEPT CaSO4, BaSO4, PbSO4 |
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Which ions are insoluble? |
CO3- OH- O2- EXCEPT anything with Na+, K+, NH4+ and Ca(OH)/CaO |
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Which solvent is usually used in chromatography? |
Water |
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Potassium manganate (VII) colour changes ? |
When it is reduced the purple colour and the solution turns colourless. |
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Aqueous potassium iodide is... |
extinguished when heated because it is aqueous |
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When you remove the heat from the apparatus.... |
-The air and gas vapours inside will contract when they cool, potentially creating a vacuum. -If the bottom-end of the delivery tube was below the liquid surface then it could literally suck back some of that liquid into the apparatus. |
