Concept explainers
Calculate the value of [OH−] from the given [H3O+] and label the solution as acidic or basic.
- a. 10−1 M
- b. 10−13 M
- c. 2.6 × 10−7 M
- d. 1.2 × 10−12 M
(a)
Interpretation:
The [OH]- value of 10-1M has to be calculated and the solution has to be determined as acidic or basic.
Concept Introduction:
The ion-product constant for water (Kw) is calculated using the formula,
Kw=[H3O+][OH-]
The value of Kw is 1.0×10-14 for all aqueous solution at 25oC.
For a solution to be acidic, [H3O+]>[OH-].
For a solution to be basic, [OH-]>[H3O+].
Answer to Problem 8.70AP
The value of [OH-] is 10-13M.
The solution is acidic.
Explanation of Solution
Given,
[H3O+]=10-1MKw=1.0×10-14
The concentration of OH- is calculated as,
[OH-]=Kw[H3O+][OH-]=1.0×10-1410-1[OH-]=1.0×10-13M
The value of [OH-] is 10-13M.
The solution is acidic, since the concentration of H3O+ is greater than hydroxide ions.
(b)
Interpretation:
The [OH]- value of 10-13 M has to be calculated and the solution has to be determined as acidic or basic.
Concept Introduction:
Refer to part (a).
Answer to Problem 8.70AP
The value of [OH-] is 10-1M.
The solution is basic.
Explanation of Solution
Given,
[H3O+]=10-13 MKw=1.0×10-14
The concentration of OH- is calculated as,
[OH-]=Kw[H3O+][OH-]=1.0×10-1410-13[OH-]=1.0×10-1M
The value of [OH-] is 10-1M.
The solution is said to be basic, since the concentration of OH- is greater than the concentration of hydronium ions.
(c)
Interpretation:
The [OH]- value of 2.6×10-7 M has to be calculated and the solution has to be determined as acidic or basic.
Concept Introduction:
Refer to part (a).
Answer to Problem 8.70AP
The value of [OH-] is 3.846×10-8M.
The solution is acidic.
Explanation of Solution
Given,
[H3O+]=2.6×10-7 MKw=1.0×10-14
The concentration of OH- is calculated as,
[OH-]=Kw[H3O+][OH-]=1.0×10-142.6×10-7[OH-]=3.846×10-8M
The value of [OH-] is 3.846×10-8M.
The solution is said to be acidic, since the concentration of H3O+ is greater than the concentration of hydroxide ions.
(d)
Interpretation:
The [OH]- value of 1.2×10-12 M has to be calculated and the solution has to be determined as acidic or basic.
Concept Introduction:
Refer to part (a).
Answer to Problem 8.70AP
The value of [OH-] is 8.33×10-3M.
The solution is basic.
Explanation of Solution
Given,
[H3O+]=1.2×10-12 MKw=1.0×10-14
The concentration of OH- is calculated as,
[OH-]=Kw[H3O+][OH-]=1.0×10-141.2×10-12[OH-]=8.33×10-3M
The value of [OH-] is 8.33×10-3M.
The solution is said to be basic, since the concentration of OH- is greater than the concentration of hydronium ions.
Want to see more full solutions like this?
Chapter 8 Solutions
Principles of General, Organic, Biological Chemistry
- Use the expression below to ⚫ calculate its value and report it to the proper number of significant digits (you may need to round your answer). ⚫ calculate the % error (or % relative error or % inherent error) ⚫ calculate the absolute error. (30.078±0.003) - (20.174±0.001) + (9.813±0.005) = Value: % Error: absolute error: ± % (only 1 significant digit) (only 1 significant digit)arrow_forwardDon't used Ai solution and don't used hand raitingarrow_forwardCircle the letter next to the most appropriate response. 1) Which is likely to be the least soluble with water? a) hexane b) acetone c) trichloromethane d) trinitro-toluene 2) Which is likely to be the most soluble in 3,4-dimethyloctane? a) hexane b) acetone c) trichloromethane d) trinitro-toluene 3) When ammonium nitrate is dissolved in water, the solution: a) gets warmer. b) gets colder. c) stays the same temperature. d) is none of the above because potassium nitrate is insoluble.arrow_forward
- Nonearrow_forwardCircle the compound below that you predict to be least soluble in water and explain yourselection. Please provide a throrough understanding.arrow_forwarditled [ The America | 241932100 交量 x Hanil Eco So | Question 5 ilearn.laccd.edu 0.5/0.5 pts How many amino acids do you see in the following structure? H3N-CH-C-N-CH-C-N-CH-C-N-CH-C-0- E-N-CH-E-N-CH-C-O- H₁C-CH | | H CH2 H CH₂ H CH2-C-NH2 CH3 CHANH, 6 ○ 5 3 4 H N 5 ptsarrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage Learning