Question

#1: Lemon juice is a weak acid. It has a [H+] of 5.0 × 10^-2 M. What is the pH of lemon juice?

A. 1.0

B. 1.3

C. 5.0

D. 7.5

***my answer: B. 1.3

is that right?

Answer 1

#2: Water can act as both an acid and a base in an ionization reaction to form H+ and OH- ions. What is this phenomenon called?

A. neutralization

B. acid dissociation

C. base dissociation

D. self-ionization

***My answer: D. self-ionization

is that right? :)

Answer 2

#3: A solution of vinegar and water has a pH of 6.2. What type of solution is this?

A. acidic

B. basic

C. neutral

***my answer: B. basic

is that right? :)

Answer 3

yes thus far !

Answer 4

#4: Hydrochloric acid (HCl) and acetic acid (HC2H3O2) are both acids. HCl completely dissociates in water, while HC2H3O2 does not. Which of the following statements best describes these two acids?

A. HCl is a strong acid; HC2H3O2 is a strong acid.

B. HCl is a weak acid; HC2H3O2 is a weak acid.

C. HCl is a strong acid; HC2H3O2 is a weak acid.

D. HCl is a weak acid; HC2H3O2 is a strong acid.

***my answer: C.

is that right? :)

Answer 5

ooh! Yayyy for the first 3 @aaronq :)

hopefully these next 2 are okay as well! hehe

Answer 6

hey it seems u were right in the last question 3 its not option A but option u mentioned was right

Answer 7

#5: Pyridine is a weak base with the formula C5H5N. Pyridine reacts with water according to the following equation: C5H5N + H2O ---> C5H5NH+ + OH-. What is the formula for the dissociation constant for this base?

A. Kb = [OH-][C5H5NH+]/[C5H5N]

B. Kb = [H+][CO2H-]/[C5H5N]

C. Kb = [C5H5N]/[OH-][CO2H-]

D. Kb = [C5H5N][CO2H-]/[OH-]

***my answer: A

is that right? :)