91影视

The instrument used for computing the specific rotation caused by polarized light is called a polarimeter. Once the measurement is acquired, it is substituted in the specific rotation formula.

This helps in finding the specific rotation value, which is a property of a particular compound.

Let A denote the fraction of D-glucose in the 伪 form and B denote the fraction of D-glucose in the 尾 form.

A + B = 1

B = 1 - A

The specific rotation of A is 150.7.

The specific rotation of B is 52.8.

The specific rotation of the equilibrium mixture is 80.2.

The specific rotation of the mixture can be found as:

Specific rotation of the mixture = Specific rotation of A x fraction of D - glucose in the 伪 form + Specific rotation of B x fraction of D - glucose in the 尾 form

80.2 = 150.7A+(1-A)52.8

80.2 = 150.7A + 52.8 - 52.8A

27.4 = 203.5A

The value of A can be found as:

A = 27.4/203.5

= 0.135

The value of B can be found as:

B = 1 - A

= 1 - 0.135

= 0.765

This calculation indicates that 13.5% is in the 伪 -D galactose and 76.5% is in the 尾 -D galactose.