1. Describe the test for oxygen gas

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2. In a flame test, why is hydrochloric acid used?

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3. 1.170 g of CoCl₂.xH₂O gave a residue of 0.641 g on heating. Find x.

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4. What is defined as a proton donor?

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5. What scale typically ranges between 0 and 14?

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6. Is magnesium oxide acidic or basic?

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7. Can a base neutralise an acid?

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8. Describe the observations of the reaction of magnesium and dilute sulfuric acid

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9. Describe the method to prepare a pure dry sample of copper sulfate (soluble salt)

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10. State the formula of the carbonate ion

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11. Is ammonium nitrate soluble?

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12. How are potassium ions identified, and what is the result?

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13. A pure, dry sample of an insoluble salt can be prepared starting with two soluble reactants. What is this method called?

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14. An acid is called a proton _________

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15. When testing for halide or sulfate ions, why is acid added added first?

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16. A pure, dry sample of a soluble salt can be prepared starting from an acid and alkali. What are the two stages of this method called?

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17. When NaOH is added to a sample, a green precipitate forms. What cation was present in the sample?

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18. What method would be followed to prepare a sample of pure, dry lead (II) sulfate?

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19. When preparing hydrated copper(II) sulfate crystals starting from copper(II) oxide, why is an excess of copper (II) oxide added?

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20. What is an alkali?

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21. What is the universal indicator colour of a pH 8-10 solution?

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