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Patrick L.
Patient, Professional PhD Organic Chemistry Tutor
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Organic Chemistry
TutorMe
Question:

Which is more acidic, an sp2 C-H proton, or an sp C-H proton, and why?

Patrick L.
Answer:

The sp H is more acidic because in an sp hybrid, electrons are generally held closer to the nucleus due to more s character in the hybrid. Thus, the proton is removed more easily.

Chemistry
TutorMe
Question:

What is the 18 electron rule?

Patrick L.
Answer:

This rule generally applies to organometallic compounds, in particular Fe, Cr, Mn, and Co. Essentially, it parallels the 8 electron rule for rows 1-3 of the periodic table. If a metal has 18 electrons in its valence shell, it has achieved a noble gas configuration.

Basic Chemistry
TutorMe
Question:

For any given acid HA with a known dissociation constant Ka, when does the ratio of H(+) to A(-) =1?

Patrick L.
Answer:

When pH = pKa

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