CAPE Chemistry Unit 2 · 2007 · Paper 2 · Question 6(d)
Give the approximate pH of the solution formed from the reactions in (c)(i) and (c)(ii).
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- 6(a)Complete Table 4 by stating the type of bonding present in Na2O, MgO, Al2O3, AlCl3, SiCl4, and PCl5.[6 marks]
- 6(b)(i)State the acid/base character of MgO.[1 mark]
- 6(b)(ii)State the acid/base character of Al2O3.[1 mark]
- 6(c)(i)Write a balanced equation for the reaction of Na2O with water.[2 marks]
- 6(c)(ii)Write a balanced equation for the reaction of SiCl4 with water.[2 marks]
- 6(c)(iii)Write a balanced equation for the reaction of PCl5 with water.[2 marks]
- 6(e)Explain why SiCl4 is a liquid at room temperature and pressure whereas SiO2 is a solid with a high melting point, in terms of structure and bonding.[4 marks]
More practice: the rest of this paper · more Acidic and Basic Character of Organic Compounds questions · all CAPE Chemistry Unit 2 past papers