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A solution of L-alanine (4.0g/50 ml of 6 N HCl) has a rotation of +1.61° in a 2dm polarimeter tube. Calculate the specific rotation of L-alanine in 6 N HCl.

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A solution of L-alanine (4.0g/50 ml of 6 N HCl) has a rotation of +1.61° in a 2dm polarimeter tube. Calculate the specific rotation of L-alanine in 6 N HCl.

(a) +15.1°

(b) +10.1°

(c) +11.1°

(d) +16.1°

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This intriguing question comes from Amino Acids and Proteins topic in division Biomolecules and Catalysis of Life Sciences

1 Answer

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Best answer
Correct answer is (b) +10.1°

Best explanation: [α] = Α°/ l×C; +1.61/2×0.08

                        [α]= +10.1°.

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