CHEM-002 Lecture Notes - Lecture 14: Conjugate Acid, Chlorate, Histone H2A

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chocolatedeer31

2 Mar 2017

School

Georgetown University

Department

Chemistry

Course

CHEM-002

Professor

Dedios Angel

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Document Summary

Ka of conjugate acid = kw / kb of conjugate base if an acid is strong, its conjugate acid is weak. The conjugate base of a strong acid has negligible basicity ka is pretty muc infinite and kb is pretty much zero. Salts in water can be acidic or basic as well. Naf will be basic, because f can take the h from water because hf is not a strong acid, but na cannot take oh because it is a strong base. Kcl is acidic because k can take a proton but cl cannot take a hydroxide, so the amount of hydroxide in solution increases. Ions that come from strong acids and strong bases are neutral. Strength of an acid increases along a row: electronegativity increases. Oxyacids nitrate, perchlorate, chlorate, surfiric acid acids that have the proton attached ot their oxygen, not to another element. The size of the acid does not matter.

Related Questions

Why do ionic compounds dissolve well in water? Select all that are true.

Question 5 options:

Because water and ionic compounds are both polar

Water molecules have partial charges that attract the ions in the solid compound, causing it to dissociate into separated ions

Because organic compounds are nonpolar

Water molecules can surround an ion, and neutralize the ion's charge using either it's partial positive or negative side.

The individual ions are solvated by water molecules which stabilizes the ions

2. Which compound is soluble in ether but not soluble in aqueous sodium hydroxide?

Question 2 options:

	ArOH
	Ar
	ArCOOH

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When you have a two-layer mixture of water and tert-butyl methyl ether, what physical property of these liquids assures you that the ether is the top layer?

Question 4 options:

low density was my answer was

You perform each extraction twice, first with 1 mL and second with 0.15 mL. Why is the second extraction necessary?

Question 8 options:

	several small extractions is better than one large one
	to remove any orgnaic material contaninating tube 2
	to remove any remaining neutral compound

7. Which of the following reactions is not favorable?

Question 7 options:

	ArCOOH + NaOH â ArCOO^-Na⁺ + H₂O
	ArOH + NaHCO₃ â ArO^-Na⁺ + CO₂ + H₂O
	ArCOOH + NaHCO₃ â ArCOO^-Na⁺ + CO₂ + H₂O

9.Why is phenol more acidic than an aliphatic alcohol?

Question 9 options:

	Its conjugates baseâs negative charge is localized on the oxygen
	Phenols have a stronger O-H bond
	Only the phenol can form hydrogen bonds
	Its conjugated base is stabilized by resonance

Which aqueous base reacts with a carboxylic acid but not with phenol? Why?

Question 10 options:

	Sodium bicarbonate, it is a weaker base and will only react with strong acids
	Sodium hydroxide, it is a strong base and will only react with strong acids
	Sodium bicarbonate, it is a weak base and will only react with weak acids
	Sodium hydroxide, it is a strong base and will only react with weak acids