CHE 202 Lecture Notes - Lecture 8: Nucleophile, Acid Dissociation Constant, Heteroatom

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purpleweasel861

28 Oct 2020

School

University at Buffalo

Department

Chemistry

Course

CHE 202

Professor

Clizbe Elizabeth

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Document Summary

Drawing draw in : melting point : , compare increases with more stack ability , symmetry , molecular weight. Draw conjugate base remove ht: arrows : ( right more favored ) ) mmooteeraesorneadnce. ( equally favored : pkalkkaaicpwa. ua# - nolet . = further ( no electrum g atom: acidity: depends on on cb. Charge ( t more acidic: keg : Reactant favored : favored : keg > i keg < i: structural effect : Elemental effect evaluate atom on proton . Look at the size of the atom . larger = more acidic . Polar effect varying distance of electronegative electron . Charge effect - positively charged attracts e better than neutral - positive = stronger acid . Group 17 ( compare bond strength - weaker strength = stronger acid : electrophile us . nucleophile (cid:8869) arrow head (cid:8869) (cid:8869) it bonds (cid:8869) it cyclohexane. Arrow tail (cid:8869) must be lb , donating anything other than a ht steps :

Related Questions

QUESTION 1

Which of the following substances is most acidic?

		Cowâs milk - pH 6.6
		Apple juice - pH 3.0
		Tomato juice - pH 4.5
		Distilled water - pH 7.0

2 points

QUESTION 2

A buffer is a substance that converts:

Alkaline solutions to neutral solutions.

Acidic solutions to alkaline solutions.

Strong bases or acids to weak bases or acids.

Acidic solutions to neutral solutions.

QUESTION 3

How does a solution of pH 7 compare to a solution of pH 10?

		pH 7 has more OH^- ions
		pH 7 is more basic
		pH 7 has a higher pH
		pH 7 has more H⁺ ions

2 points

QUESTION 4

According to the Arrhenius Theory of acids and bases, a base is:

A substance that decrease the amount of hydroxide ions present.

A substance that increases the amount of hydroxide ions present when it is dissolved in water.

A substance that increase the amount of hydrogen ions present.

A substance that increases the amount of hydrogen ions present when it is dissolved in water.

QUESTION 5

Which of the following are true regarding acid-base titrations?

		They are used to determine the concentration of an unknown acid or base.
		The acid or the base must be a standard solution with a known concentration
		The standard solution is titrated into the chemical with the unknown concentration.
		All of the above are true regarding acid-base titrations.

2 points

QUESTION 6

Which of the following is not an example of a neutralization reaction?

HCl + NaOH NaCl +H₂O

2 NaOH + H₂CO₃ Na₂CO₃ +2 H₂O

H₂SO₄ + 2 NH₄OH (NH₄)₂SO₄ + 2 H₂O

2 AgNO₃ + Zn 2Ag +Zn(NO₃)₂

QUESTION 7

Which acid base theory defines an acid as a proton donor and a base as a proton acceptor?

		Arrhenius Theory
		Bronsted-Lowery Theory
		Conjugate Pairs Theory
		Lewis Theory

2 points

QUESTION 8

The Arrhenius Theory states that acid-base reactions create a solution composed of a water and a salt. This is because mixing an acidic and basic solution together yields:

A neutral solution

A solution with a pH at or near 7

Both A and B are correct

QUESTION 9

Which of the following correctly defines a standard solution?

		A solution which always has the same molecular geometry.
		A solution in which the concentration is precisely known.
		A solution in which the volume is precisely known.
		A solution which always has different levels of solutes and solvents.

2 points

QUESTION 10

Acids naturally present in food are generally safe to eat because they are usually:

		Concentrated
		Dilute
		Weak
		Strong

None of the above are correct

QUESTION 1

In naming branched alkanes, we name alkane branches of different names in _________ order.

	a.	alphabetical
	b.	numeric
	c.	size
	d.	none

QUESTION 2

A 10 carbon hydrocarbon with a 1 carbon group at the 2nd and 4th carbons, a 3 carbon group at the 5th carbon and a 2 carbon group at the 4th carbon would be named ______________.

	a.	5-propyl-4-ethyl-2,4-dimethyldecane
	b.	4-ethyl-2,4-dimethyl-5-propyldecane
	c.	none
	d.	2,4-dimethyl-4-ethyl-5-propyldecane

QUESTION 3

In naming alkanes, the longest chain is named using a prefix and the suffix _________.

	a.	none
	b.	-yl
	c.	-ane
	d.	-ate

QUESTION 4

In naming branched alkanes, the ___________ chain is given the name of the corresponding n-alkane.

	a.	main
	b.	side
	c.	none
	d.	first

QUESTION 5

In drawing structures from a name, the first step is to ___________.

	a.	draw the carbon skeleton
	b.	add the hydrogens
	c.	none
	d.	draw the branch skeletons

QUESTION 6

In naming branched alkanes, we use __________ to separate the name of the branch from its number.

	a.	an apostrophe
	b.	none
	c.	a dash
	d.	a comma

QUESTION 7

Alkanes are classified as ________ hydrocarbons.

	a.	unsaturated
	b.	transsaturated
	c.	saturated
	d.	none

QUESTION 8

The prefix but- refers to a hydrocarbon with __________ carbons.

	a.	three
	b.	two
	c.	four
	d.	one

QUESTION 9

Alkanes fall into two classifications, __________ alkanes and branched alkanes.

	a.	none
	b.	neat
	c.	normal
	d.	linear

QUESTION 10

The prefix hex- refers to a hydrocarbon with _________ carbons.

	a.	eight
	b.	four
	c.	two
	d.	six

CHE 202 Lecture Notes - Lecture 8: Nucleophile, Acid Dissociation Constant, Heteroatom

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