Inorg_Ch2-6 - Periodicity < PERIOD/AL91P2_4b 4. (b) Give...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Periodicity <<< PERIOD/AL91P2_4b 4. (b) Give the formula of one chloride for each of the element N, O and S. Write an equation for the reaction (if any) of each chloride with water. Draw the electronic structure of a molecule of each chloride and describe the molecular shape. (6 marks) <<< PERIOD/AL92P1_3c 3. (c) In aqueous media, why does ammonia act as a base whereas hydrogen fluoride acts as an acid? (2 marks) <<< Period/AL93P2_4a 4. (a) The first member of a Group in the Periodic Table usually exhibits anomalous behaviour. For lithium in Group I, give two examples of anomalous behaviour and explain how this behaviour arises. (3 marks) <<< period/AL95P1_2d 2.(d) (i) State whether the following hydrides would react with water under room temperature and atmospheric pressure. If there is a reaction, give the balanced equation. (I) CH 4 (II) SiH 4 (III) H 2 S (IV) HCl (ii) Explain the difference in reactivity with water between CH 4 and SiH 4 . (iii) Explain the difference in reactivity with water between SiH 4 and H 2 S. (6 marks) <<< Periodicity/AL96P1_4a 4. (a) BaO is a basic oxide, while CO 2 is an acidic oxide. (i) State ALL observation when dilute HCl(aq) is added to BaO(s). (ii) State ALL observation when CO 2 is bubbled, until in excess, into the following solutions. (I) dilute HCl(aq) (II) Ca(OH) 2 (aq) (4 marks) <<< period/AL01P2_3c >> 3. (c) Li 2 O, CO 2 and F 2 O are oxides of the Period 2 elements. (i) Explain why Li 2 O and CO 2 react differently with water. (ii) What products are formed when F 2 O reacts with water. (5 marks) Group 3 and 4 <<< gp3/AL87P1A2a 2 (a) Aluminium chloride vapour exists as a dimer at 623 K. (i) Draw the structure of the aluminium chloride dimer and comment briefly on its bonding. With water, solid aluminium chloride hydrolyses violently to yield an acidic solution X which, when treated with sodium carbonate solution, gives a white precipitate and carbon dioxide.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
(ii) Write equations for the formation of solution X, and account for its acidity. (iii) Identify the white precipitate and write equation(s) for its formation. (6 marks) <<< gp4/AL91P2_5a 5. (a) For each of the elements carbon, silicon and tin: (i) Choose one oxide that is stable at room temperature and state whether it is acidic, basic or amphoteric. (ii) Write a balanced equation(s) to illustrate this property in each case. (iii) Predict the formula and the acidic, basic or amphoteric nature of an oxide of germanium. (5 marks) 5. (b) Explain why SiH 4 is hydrolysed by alkali, whereas CH 4 is not, and give an equation for the hydrolysis. (3 marks) <<< gp56/AL92P2_6A 6. (a) (i) Write the formula in each case of ONE compound or ion in which nitrogen has the oxidation state +5, +3, -1, and -3. (ii)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

Inorg_Ch2-6 - Periodicity &lt; PERIOD/AL91P2_4b 4. (b) Give...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online