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Tutor profile: Kylee R.

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Kylee R.
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Questions

Subject: Organic Chemistry

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Question:

What are enantiomers?

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Kylee R.
Answer:

Enantiomers are stereoisomers - i.e. their formula and bonds are the same, but their structure differs in 3D. Enantiomers are stereoisomers that exist as mirror images of each other. Occurs when there is a chiral carbon in the structure.

Subject: Biochemistry

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Question:

If pK1 = 2.34 and pK2 = 9.60, then the pI is?

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Kylee R.
Answer:

pI = isoelectric point. It's where the molecule is electrically neutral. It is found by finding the mean of the pK values. So (2.34 + 9.60) / 2 = 5.97

Subject: Basic Chemistry

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Question:

What are the 3 types of bonds and how do they work?

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Kylee R.
Answer:

Metallic, covalent and ionic. Metallic - occurs only in metals. The electrons are free to move, which is why metals conduct electricity. Covalent - between non-metals only. Electrons are shared to form the bond. Ionic - between metals and non-metals. Metals donate their electrons (thus becoming positive, a cation) and non-metals accept them (become negative, an anion). A bond is formed due to the attraction between + and -.

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