1. Describe an experiment to prepare a pure, dry sample of an insoluble salt, starting from two soluble reactants

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2. Is iron carbonate soluble?

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3. What is a base?

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4. Describe the method to prepare a pure dry sample of sodium chloride (soluble salt)

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5. State the formula of the carbonate ion

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6. What scale typically ranges between 0 and 14?

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

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8. What is defined as a proton acceptor?

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9. Which gas will turn damp red litmus paper blue?

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

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11. An alkali is called a proton _________

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12. What is an acid?

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

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14. In a flame test, a yellow colour is seen. Give the formula of the cation which is present.

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15. When testing a sample of potassium chloride, nitric acid and then silver nitrate is added. Describe the result, and name the substance formed.

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16. 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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17. Write the word equation to represent the reaction between copper oxide and sulfuric acid

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18. A pure, dry sample of a soluble salt can be prepared starting with an insoluble reactant. What is this method called?

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19. 1.170 g of CoCl₂.xH₂O gave a residue of 0.641 g on heating. Find x.

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20. Is iron (III) hydroxide acidic or basic?

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21. What is the universal indicator colour of a pH 0-3 solution?

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