Analytical Chemistry
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50 questions
| 🇬🇧 | 🇬🇧 |
| Colour of chromate ion? | Yellow |
| Colour of chromate ion? | Yellow |
| Colour of chromate ion? | Yellow |
| Colour of chromate ion? | Yellow |
| Colour of chromate ion? | Yellow |
| Colour of chromate ion? | Yellow |
| What does qualitative analysis mean? | Identification of the unknown substance |
| What does quantitive analysis mean? | Determination of composition of a mixture |
| What is a reagent? | A substance which reacts with another substance |
| What is caustic soda? | Sodium Hydroxide |
| Is calcium ions soluble in excess alkalis? | Sparingly soluble |
| Is Iron (2) soluble in NaOH? | Insoluble |
| What is the colour of Iron (3) when added to NaOH? | Reddish Brown |
| Is Iron (3) soluble in NaOH? | Insoluble |
| Are copper ions soluble in NaOH? | Insoluble |
| What is the colour of zinc when added to NaOH? | Gelatinous white |
| What is the colour of lead when added to NaOH? | Chalky white |
| Is lead soluble in NaOH? | Soluble |
| Why is no precipitation formed when we add calcium to NH4OH? | Because concentration of OH- ions is so low that it cannot precipitate the hydroxide of calcium |
| Is iron (2) soluble in NH4OH? | Insoluble |
| What is the colour of Iron (3) when added to NH4OH? | Reddish brown |
| Is iron (3) soluble in NH4OH? | Insoluble |
| What is the colour of copper when NH4OH is added in excess? | Azure blue solution is formed |
| What is the colour of zinc when added to NH4OH? | Gelatinous white |
| Is lead salt soluble in NH4OH? | Insoluble |
| Why does Ammonium salt when added to NH4OH does not give out ammonia? | Because of common ions NH4CL will not give any reaction |
| What happens when any water soluble base is heated with ammonia salts? | Ammonia gas is evolved |
| Compounds which react with both acids and alkalis to form salt and water? | Amphoteric oxides and hydroxides |
| Compounds which show both acidic and basic character? | Amphoteric compounds |
| Colour of ferrous ion? | Light green |
| Colour of ferric ion? | Yellowish brown |
| Colour of permanganate ion? | Pink or purple |
| Colour of chromate ion? | Yellow |