AQA Jan 2012 Paper 5 Q3

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do not write outside the box the data in the table below show the melting points of oxides of some period elements tm k na o p o so a in terms of structure and bonding explain why a i sodium oxide has a high melting point marks extra space a ii sulfur dioxide has a low melting point marks extra space b explain why the melting point of p o is higher than the melting point of so marks extra space wmp jan chem c write equations for the reactions of na o and p o with water in each case give the approximate ph of the resulting solution do not write outside the box equation for na o ph equation for p o ph marks d write an equation for the acid base reaction that occurs when na o reacts with p o in the absence of water mark turn over for the next question turn over wmp jan chem

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