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Q pack Chem #52 - glycine polar/nonpolar?

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Which of the properties is associated with glycine existing as a dipolar ion in aqueous solution?

A)High dipole moment
B) high Molecular weight
C) Low dielectric constant
D) Low solubility in water

I reasoned this by knowing glycine is a non-polar amino acid and super small. So i eliminated A and B, then I know glycine has an amine and carboxylic group so it would be soluble in water.

So, I ended with C.

The answer is A, but I thought glycine was nonpolar?

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