Question 1

How many π bonds are present in the structure of formamidinium (as shown in the worksheet)?

Accepted Answer

2

Question 2

What is the hybridization of the nitrogen atom labeled 'B' in the formamidinium structure?

Accepted Answer

$$sp^2$$

Question 3

How many lone pairs of electrons does the nitrogen labeled 'B' have in the formamidinium ion?

Accepted Answer

1

Question 4

Which type of orbital overlap creates the bond between the carbon and nitrogen labeled as 'x' in the formamidinium structure?

Accepted Answer

$$sp^2-sp^2$ \sigma$$ overlap

Question 5

How many carbons are in the molecule of formamidinium?

Accepted Answer

1

Question 6

Given the Lewis structure of $$CH_2COCH_3$$, what is the hybridization of the central carbon atom?

Accepted Answer

$$sp^2$$

Question 7

Which of the following is the strongest acid?

Accepted Answer

$$CH_2FCOOH$$

Question 8

Which compound in each of the following pairs is the stronger acid? $$CH_3CH_2CO_2H vs$$ $$CH_2FCO_2H$$

Accepted Answer

$$CH_2FCO_2H$$

Question 9

Draw the products of the following acid-base reaction: $$CH_3CH_2O^- + H_2O \rightarrow$$ ? Which side is favored?

Accepted Answer

$$CH_3CH_2OH + OH^-$$; products favored

Question 10

For the following compound, which atom will have a formal charge of -1 at pH = 8.0? $$CH_3COO^-$$

Accepted Answer

One of the oxygens

Question 11

Which of the following acids has the highest $$K_a$$ value?

Accepted Answer

$$H_3O^+$$

Question 12

Given the p$$K_a of a $$compound is 5.30, at what pH will 25% of the compound be in its basic form?

Accepted Answer

$$pH = 4.90$$

Question 13

Which of the following is the correct IUPAC name for the compound shown: (structure with 4 carbons, one double bond at position 2, and a methyl group at position 3)?

Accepted Answer

3-methyl-1-butene

Question 14

Which of the following Newman projections represents the most stable conformation of 2-methylpentane looking down the C3-C4 bond?

Accepted Answer

Staggered with methyl and ethyl groups anti

Question 15

Which of the following statements about the hybridization of carbon atoms in $$CH_2COCH_3 is $$correct?

Accepted Answer

The central carbon is $$sp^2$$ hybridized, the others are $$sp^3$$

Question 16

Which of the following is the correct line structure for 4-ethoxy-2-methylhexane?

Accepted Answer

A six-carbon chain with an ethoxy group at C4 and a methyl at C2

Question 17

Which of the following best explains why $$CH_2FCO_2H is a $$stronger acid than $$CH_3CH_2CO_2H$$?

Accepted Answer

The fluorine atom stabilizes the conjugate base via induction

Question 18

Which of the following is the correct formal charge on the nitrogen atom in the imidazolium ion at pH 8.0?

Accepted Answer

+1

Question 19

Which of the following best describes the most stable chair conformation of trans-1,2-dimethylcyclohexane?

Accepted Answer

Both methyl groups are equatorial

Organic Chemistry I: Foundational Concepts and Practice Problems

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