What is the concentration in grams per litre of a solution of lactose which gives rotation ?

Posted on 2013-12-18 18:22:00 in Chemistry by BETHANY

The value of [a]_D²⁰ for lactose is 55.4⁰. What is the concentration in grams per litre of a solution of lactose which gives a rotation of 7.24⁰ in a 10 cm cell at 20⁰ with sodium D light?

The optical of quartz is due to a peculiar arrangement of molecules within the crystal (spiral arrangement).

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