What steps could be taken to make the benedicts test for reducing sugar quantitative?
A qualitative test involves an observation that is general, like change in colour of temperature. A quantitative test involves measuring the amounts (or quantities) that have changed. It requires much more precise measurement and a method to identify and measure the reaction components. You need to identify the number of mols of compound at the beginning and end of the reaction. Start by measuring the mass of pure sugar and then look up the Molecular weight and calculate the number of Mols. You then need to separate out (filter or centrifuge) and measure the mass of pure copper oxide formed. From the chemical equation of the reaction, you can then make a quantitative summary in terms of how much of sugar was reacted to form copper oxide and by products.
