Topic 10 Qualitative and materials

1 To which group in the periodic table do lithium, sodium and potassium belong?

2 To get a hot blue Bunsen burner flame, do you open or close the air hole?

3 What is the formula for a calcium ion?

4 Which of these is a transition metal: copper or calcium?

5 Name the metal ions present in KCl, K2SO4 and KNO3.

6 What name is given to the rainbow of colours seen when white light passes through a prism?

7 What is the concentration of the solution formed by dissolving 1 g of salt in 2 dm3 of water?

8 What colour flame do you see when potassium reacts with water?

9 Is calcium chloride a covalent compound or an ionic compound?

10 Which of these compounds is soluble in water: sodium carbonate or calcium carbonate?

11 Give the flame test colour for sodium ions, Na+.

12 Which metal ion produces a blue-green flame test colour?

13 Which metal ion produces an orange-red flame test colour?

14 Give the flame test colour for potassium ions, K+.

15 Give one way that instrumental methods improve the analysis of substances.

16 The flame photometer is used to find the concentration of ions. What else is it used for?

17 Name the type of graph needed to find the concentration of ions when using a flame photometer.

18 A substance turns red litmus paper blue. What does this tell you about the substance?

19 Which ion has the formula NH4+?

20 Which of these substances is insoluble in water: aluminium hydroxide or sodium hydroxide?

21 Give the flame test colour for copper ions.

22 Which metal ion produces a yellow flame test colour?

23 What colour is the precipitate produced when sodium hydroxide is added to Fe2+ ions?

24 Which white precipitate disappears to form a colourless solution when excess sodium hydroxide is added: aluminium hydroxide or calcium hydroxide?