18.2. Esters
A subsection of Chemistry, 9701, through 18. Carboxylic acids and derivatives
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The use of sucrose in food processing depends in part on osmotic pressure, symbol Π. In dilute solution, Π varies with concentration in a similar way to gas behaviour. The equation Π V = nRT can be used, where n is the number of moles of solute molecules contained in volume V at temperature T. The number of moles of solvent molecules should be ignored. Under aqueous acidic conditions sucrose is hydrolysed. C12H22O11 + H2O → CH2OH(CHOH)4CHO + CH2OH(CHOH)3COCH2OH sucrose glucose fructose What can be deduced from this hydrolysis equation?
9701_w11_qp_12
MCQ
2011
Paper 1, Variant 2
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Questions Discovered
70