i) Write a full balanced equation for (a) the complete combustion of glucose and (b) the incomplete combustion of glucose. ii) Following from part i) suggest a reason (and explain) the difference with the product in reaction (a) and that of reaction (b).

Part I (4 marks) a) C6H12O+ 6O-> 6CO+ 6H2O b) C6H12O+ 3O2 -> 6CO + 6H2O Part II (2 marks) Equation (a) could be carried out in an open vessel where there is an excess of oxygen, whereas equation (b) would be carried out within a closed vessel. The reaction being carried out in a closed vessel means that the supply of oxygen is less and thus carbon monoxide is produced rather than carbon dioxide.

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Answered by Lavan G. Chemistry tutor

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