A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The K a of formic acid is 1.8 x 10 -4 .

Formic acid < Potassium formate

Formic acid > Potassium formate

Formic acid = Potassium formate

More information is needed to determine the relative concentrations

In which of the following aqueous solutions does the weak acid exhibit the highest percentage of ionization? (Remember : 1. the stronger the acid, the greater is the percent ionization; 2. diluting the solution increases the percent ionization)

.01 M HC 2 H 3 O 2 . (K a 1.8 x 10 -5 )

.01 M HNO 2 . ( Ka =4.5 x 10 -4)

.01 M HClO . (Ka= 3.0 x 10 -8 )

The magnitude of Kw indicates that ______________.

water autoionizes only to a very small extent

the autoionization of water is exothermic

An acetate buffer solution is prepared by combining 50 mL of 0.20 M acetic acid, HC 2 H 3 O 2 (aq), and 50 mL of 0.20 M sodium acetate, NaC 2 H 3 O 2 (aq). A 5.0 mL sample of 0.10 NaOH(aq) is added to the buffer solution. Which of the following is a correct pairing of the species in greater concentration and of the pH of the solution after the NaOH(aq) is added? (The pK a of acetic acid is 4.7.)

C 2 H 3 O 2 - > C 2 H 3 O 2 H, pH > 4.7

C 2 H 3 O 2 - < C 2 H 3 O 2 H, pH < 4.7

C 2 H 3 O 2 - > C 2 H 3 O 2 H, pH < 4.7

C 2 H 3 O 2 - < C 2 H 3 O 2 H, pH > 4.7

Mg(OH) 2 <--> Mg 2+ + 2 OH - The exothermic dissolution of Mg(OH) 2 (s) in water is represented by the equation above. THe K sp of Mg(OH) 2 (s) is 1.80 x 10 -11 . Which of the following changes will increase the solubility of Mg(OH) 2 (s) in an aqueous solution?

Adding Mg(NO 3 ) 2 to the solution

WHich of the following accounts for the observation that the pH of pure water at 37°C is 6.8?

At 37°C the autoionization constant for water, K w , is larger than it is at 25°C

At 37°C water is naturally acidic.

At 37°C water has a lower density than it does at 25°C; therefore [H + ] is greater.

At 37°C water ionizes to a lesser extent that it does at 25°C

A student performs an acid-base titration and plots the experimental results in the graph above. Which of the following statements best explains the experimental findings?

A weak acid was titrated with a strong base, as evidenced by the equivalence point at pH >7.

A weak acid was titrated with a weak base, as evidenced by the equivalence point a pH approximately 7.

AP chemistry final review

Authored by Jin Zhou

Chemistry

11th - 12th Grade

NGSS covered

Used 22+ times

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

63 questions

Show all answers

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following would have a faster rate of effusion: 15g of Kr or 15g of N₂?

Kyrpton

Nitrogen

Both would have the same rate of effusion

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

why would O₂ effuse faster than CO₂ in the same room

because it has more energy

because it has a smaller molar mass

because oxygen has a higher temperature

they will effuse the same because the temperature is fixed

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?

74.92 amu

24.97 amu

75.01 amu

74.51 amu

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

Nitrogen-13

Nitrogen-14

Nitrogen-15

Based on the information given, it cannot be determined

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

You have a gas that has a pressure of 2 ATM and a volume of 10L. What would be the new volume if the pressure was changed to 1 ATM?

5 L

20 L

It would stay at 10L

1 L

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Acidic buffer is made up of

weak acid and weak base

weak acid and its conjugate salt

weak acid and its conjugate base

strong acid and its conjugate base

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which solution A and B of equal volume and concentration mixed together to form a buffer?

Nitric acid and potassium hydroxide

Nitric acid and potassium nitrate

Propanoic acid and potassium hydroxide

Propanoic acid and potassium propanoate

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

60 questions

Element Symbols

Quiz

•

11th Grade

60 questions

1-60 Chemical Elements and Symbols

Quiz

•

11th Grade

60 questions

Quiz Nuclear Review

Quiz

•

11th Grade - University

65 questions

Acid, Base, and Salts

Quiz

•

11th Grade - University

58 questions

Chemistry Final Review

Quiz

•

11th Grade

60 questions

word 2

Quiz

•

9th - 12th Grade

63 questions

Exam 11 Level 2

Quiz

•

11th Grade

67 questions

Unit 4: Mixed Nomenclature

Quiz

•

10th - 12th Grade

Popular Resources on Wayground

10 questions

5.P.1.3 Distance/Time Graphs

Quiz

•

5th Grade

10 questions

Fire Drill

Quiz

•

2nd - 5th Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

15 questions

Hargrett House Quiz: Community & Service

Quiz

•

5th Grade

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

20 questions

Inferences

Quiz

•

4th Grade

15 questions

Equivalent Fractions

Quiz

•

4th Grade

Discover more resources for Chemistry

30 questions

Element compound mixture review quiz

Quiz

•

10th - 12th Grade

20 questions

U4 Reaction Types

Quiz

•

10th - 12th Grade

25 questions

Potential Energy Diagram Checkpoint

Quiz

•

11th Grade

46 questions

Quantum, E Config, Periodic Trends

Quiz

•

11th Grade

5 questions

DOL REC: Solubility Rules and Precipitation Reactions

Quiz

•

10th - 12th Grade

87 questions

Test 3

Quiz

•

9th - 12th Grade

7 questions

Determine Molecular Formula from Empirical

Quiz

•

9th - 12th Grade

20 questions

Stoichiometry Practice

Quiz

•

12th Grade

AP chemistry final review

Which of the following would have a faster rate of effusion: 15g of Kr or 15g of N₂?

why would O₂ effuse faster than CO₂ in the same room

24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

You have a gas that has a pressure of 2 ATM and a volume of 10L. What would be the new volume if the pressure was changed to 1 ATM?

Acidic buffer is made up of

Which solution A and B of equal volume and concentration mixed together to form a buffer?

When making a buffer of pH = 5, acids with the following K_a values are available. Which would be the best acid to use?

A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The K_a of formic acid is 1.8 x 10^-4.

What is the pH of a buffer that is 0.08 M NaA and 0.1 HA. The Ka of HA = 1.0 x 10^-4.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

AP chemistry final review

Which of the following would have a faster rate of effusion: 15g of Kr or 15g of N2?

why would O2 effuse faster than CO2 in the same room

24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.What is the average mass of this element?

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

You have a gas that has a pressure of 2 ATM and a volume of 10L. What would be the new volume if the pressure was changed to 1 ATM?

Acidic buffer is made up of

Which solution A and B of equal volume and concentration mixed together to form a buffer?

When making a buffer of pH = 5, acids with the following Ka values are available. Which would be the best acid to use?

A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The Ka of formic acid is 1.8 x 10-4.

What is the pH of a buffer that is 0.08 M NaA and 0.1 HA. The Ka of HA = 1.0 x 10-4.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Which of the following would have a faster rate of effusion: 15g of Kr or 15g of N₂?

why would O₂ effuse faster than CO₂ in the same room

24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?

When making a buffer of pH = 5, acids with the following K_a values are available. Which would be the best acid to use?

A buffer has a pH of 4.85 and contains formic acid and potassium formate. What can you conclude about the concentrations of the components of the buffer? The K_a of formic acid is 1.8 x 10^-4.

What is the pH of a buffer that is 0.08 M NaA and 0.1 HA. The Ka of HA = 1.0 x 10^-4.