1. Is magnesium oxide acidic or basic?

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2. An alkali is called a proton _________

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3. With universal indicator, what is the pH of a purple solution?

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4. If iron chloride has the formula FeCl₃, what is the formula of the iron ion?

Question 4 of 21

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

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6. acid + alkali →

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

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8. What is the test for copper (II) ions (Cu²⁺) and what is the result?

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9. State the solubility rule for nitrate salts

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10. What is an acid?

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

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12. 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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13. Describe how you would test for sulfate ions (SO₄²⁻) and what is the result if they are present?

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14. What is the empirical formula of an alcohol with the analysis; 52.2% C, 13.0% H and 34.8% O?

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15. Can a base neutralise an acid?

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16. What is defined as a proton donor?

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17. What is the universal indicator colour of a pH 11-14 solution?

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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. In the test of a gas, a lit splint gives a squeaky pop. What is the gas?

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20. Describe how you would carry out a flame test

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

Question 21 of 21