Organic Chemistry - Standalone book
10th Edition
ISBN: 9780073511214
Author: Francis A Carey Dr., Robert M. Giuliano
Publisher: McGraw-Hill Education
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Chapter 1.12, Problem 28P
Interpretation Introduction
Interpretation:
The
Concept Introduction:
The stronger acid has the weakest conjugate base and weaker acid has its stronger conjugate base.
The strength of acids also expresses by
The acidity constant
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What is the conjugate acid of potassium hydrogen phosphate, K2HPO4?
The active ingredient of bleach such as Clorox is sodium hypochlorite (NaClO). Its conjugate acid, hypochlorous acid (HClO), has a Ka of 3.0 × 10–8.
(a)The undiluted bleach contains roughly 1 M NaClO. Calculate the pH of 1 M NaClO solution.
(b)Some applications require extremely diluted bleach solution, such as swimming pools. Suppose the solution in (a) is diluted by 10,000 -fold. Calculate the pH of the diluted solution, and demonstrate that you can still neglect the autoionization of water in your calculation.
(c)Suppose the solution in (a) is diluted by 1million-fold, briefly explain how your approach will be different. Write the equation with [H3O+] as the unknown, but you do not need to solve it.
The active ingredient of bleach such as Clorox is sodium hypochlorite (NaClO). Its conjugate acid, hypochlorous acid (HClO), has a Ka of 3.0 × 10–8.
(a) The undiluted bleach contains roughly 1 M NaClO.Calculate the pH of 1 M NaClO solution.
(b) Some applications require extremely diluted bleach solution, such as swimming pools. Suppose the solution in (a) is diluted by 10,000-fold. Calculate the pH of the diluted solution, and demonstrate that you can still neglect the autoionization of water in your calculation.
(c) Suppose the solution in (a) is diluted by 1 million-fold, briefly explain how your approach willbe different. Write the equation with [H3O+] as the unknown, but you do not need to solve it.
Chapter 1 Solutions
Organic Chemistry - Standalone book
Ch. 1.1 - How many electrons does carbon have? How many are...Ch. 1.1 - Referring to the periodic table as needed, write...Ch. 1.2 - Species that have the same number of electrons are...Ch. 1.2 - Which of the following ions possess a noble gas...Ch. 1.2 - Prob. 5PCh. 1.3 - Prob. 6PCh. 1.3 - Problem 1.7 All of the hydrogens are bonded to...Ch. 1.4 - Problem 1.8 In which of the compounds...Ch. 1.4 - Indicate the direction of the dipole for the...Ch. 1.5 - Prob. 10P
Ch. 1.5 - The following inorganic species will be...Ch. 1.5 - Prob. 12PCh. 1.6 - Prob. 13PCh. 1.6 - Problem 1.14 Nitrosomethane and formaldoxime both...Ch. 1.6 - Prob. 15PCh. 1.7 - All of the bonds in the carbonate ion (CO32-) are...Ch. 1.7 - Prob. 17PCh. 1.8 - Prob. 18PCh. 1.8 - Prob. 19PCh. 1.9 - Sodium borohydride, NaBH4, has an ionic bond...Ch. 1.9 - Prob. 21PCh. 1.10 - Which of the following compounds would you expect...Ch. 1.11 - Using the curved arrow to guide your reasoning,...Ch. 1.11 - Prob. 24PCh. 1.11 - Prob. 25PCh. 1.12 - Prob. 26PCh. 1.12 - Prob. 27PCh. 1.12 - Prob. 28PCh. 1.12 - Prob. 29PCh. 1.12 - Prob. 30PCh. 1.13 - Which is the stronger acid, H2O or H2S? Which is...Ch. 1.13 - Prob. 32PCh. 1.13 - Prob. 33PCh. 1.13 - Hypochlorous and hypobromous acid (HOClandHOBr)...Ch. 1.13 - Prob. 35PCh. 1.13 - Prob. 36PCh. 1.14 - What is the equilibrium constant for the following...Ch. 1.14 - Prob. 38PCh. 1.14 - Prob. 39PCh. 1.15 - Write an equation for the Lewis acid/Lewis base...Ch. 1 - Write a Lewis formula for each of the following...Ch. 1 - Prob. 42PCh. 1 - Write structural formulas for all the...Ch. 1 - Prob. 44PCh. 1 - Expand the following structural representations so...Ch. 1 - Each of the following species will be encountered...Ch. 1 - Consider Lewis formulas A, B, and C: H2 C -NN:...Ch. 1 - Prob. 48PCh. 1 - Prob. 49PCh. 1 - Prob. 50PCh. 1 - Prob. 51PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Prob. 54PCh. 1 - Which compound in each of the following pairs...Ch. 1 - With a pKa of 11.6, hydrogen peroxide is a...Ch. 1 - The structure of montelukast, an antiasthma drug,...Ch. 1 - One acid has a pKa of 2, the other has a pKa of 8....Ch. 1 - Calculate Ka for each of the following acids,...Ch. 1 - Rank the following in order of decreasing acidity....Ch. 1 - Rank the following in order of decreasing...Ch. 1 - Consider 1.0 M aqueous solutions of each of the...Ch. 1 - Prob. 63PCh. 1 - Prob. 64PCh. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - Prob. 68PCh. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Prob. 72DSPCh. 1 - Amide Lewis Structural Formulas Lewis formulas are...Ch. 1 - Amide Lewis Structural Formulas Lewis formulas are...
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- Find the value of Kb for the conjugate base of the following organic acids. (a) picric acid used in the manufacture of explosives; Ka = 0.16 (b) trichloroacetic acid used in the treatment of warts; Ka = 0.20arrow_forwardWrite the chemical equation and the expression for the equilibrium constant, and calculate Kb for the reaction of each of the following ions as a base. (a) sulfate ion (b) citrate ionarrow_forwardThe pH of a 0.10-M solution of propanoic acid, CH3CH2COOH, a weak organic acid, is measured at equilibrium and found to be 2.93 at 25 °C. Calculate the Ka of propanoic acid.arrow_forward
- What are the equilibrium concentrations of acetic acid, the acetate ion, and H3O+ for a 0.10 M solution of acetic acid (K2 = 1.8 105)? What is the pH of the solution?arrow_forwardComplete each of these reactions by filling in the blanks. Predict whether each reaction is product-favored or reactant-favored, and explain your reasoning. (a) _________ (aq) + Br(aq) NH3(aq) + HBr(aq) (b) CH3COOH(aq) + CN(aq) ________ (aq) + HCN(aq) (c) ________ (aq)+H2O () NH3(aq) + OH(aq)arrow_forwardFor conjugate acidbase pairs, how are Ka and Kb related? Consider the reaction of acetic acid in water CH3CO2H(aq)+H2O(l)CH3CO2(aq)+H3O+(aq) where Ka = 1.8 105 a. Which two bases are competing for the proton? b. Which is the stronger base? c. In light of your answer to part b. why do we classify the acetate ion (CH3CO2) as a weak base? Use an appropriate reaction to justify your answer. In general, as base strength increases, conjugate acid strength decreases. Explain why the conjugate acid of the weak base NH3 is a weak acid. To summarize, the conjugate base of a weak acid is a weak base and the conjugate acid of a weak base is a weak acid (weak gives you weak). Assuming Ka for a monoprotic strong acid is 1 106, calculate Kb for the conjugate base of this strong acid. Why do conjugate bases of strong acids have no basic properties in water? List the conjugate bases of the six common strong acids. To tie it all together, some instructors have students think of Li+, K+, Rb+, Cs+, Ca2+, Sr2+, and Ba2+ as the conjugate acids of the strong bases LiOH, KOH. RbOH, CsOH, Ca(OH)2, Sr(OH)2, and Ba(OH)2. Although not technically correct, the conjugate acid strength of these cations is similar to the conjugate base strength of the strong acids. That is, these cations have no acidic properties in water; similarly, the conjugate bases of strong acids have no basic properties (strong gives you worthless). Fill in the blanks with the correct response. The conjugate base of a weak acid is a_____base. The conjugate acid of a weak base is a_____acid. The conjugate base of a strong acid is a_____base. The conjugate acid of a strong base is a_____ acid. (Hint: Weak gives you weak and strong gives you worthless.)arrow_forward
- Calculate the pKa value for each of the following acids. a. Nitrous acid (HNO2), Ka = 4.5 104 b. Carbonic acid (H2CO3), Ka = 4.3 107 c. Dihydrogen phosphate ion (H2PO4), Ka = 6.2 108 d. Sulfurous acid (H2SO3), Ka = 1.5 102arrow_forwardThe active ingredient of bleach such as Clorox is sodium hypochlorite (NaClO). Its conjugate acid, hypochlorous acid (HClO), has a Ka of 3.0 × 10^–8. (a) The undiluted bleach contains roughly 1 M NaClO. Calculate the pH of 1 M NaClO solution. (b) Some applications require extremely diluted bleach solution, such as swimming pools. Suppose the solution in (a) is diluted by 10,000 -fold. Calculate the pH of the diluted solution, and demonstrate that you can still neglect the autoionization of water in your calculation. (c) Suppose the solution in (a) is diluted by 1 million-fold, briefly explain how your approach will be different. Write the equation with [H3O+] as the unknown, but you do not need to solve it.arrow_forwardCalculate the pH of a 0.24 M solution of sodium lactate. The pKa of lactic acid is 3.86.arrow_forward
- Predict whether aqueous solutions of the following substances are acidic, basic, or neutral and write hydrolysis equations for the acidic and basic solutions. (a) CsBr; (b) Al(NO3)3; (c) KCN; (d) CH3NH3Clarrow_forwardWhat is the pH of a 0.02 M solution of acetic acid (pKa = 4.84)?arrow_forwardCOHSOH(ag) + H2On + CeHsO (aq) + H3O*(a9) Ka= 1.12 x 10-10 (a) Phenol is a weak acid that partially dissociates in water according to the equation above. Write the equilibrium-constant expression for the dissociation of the acid in water. (b) What is the pH of a 0.75 M CaHsOH(ag) solution? (C) For a certain reaction involving CaHsOH(ag) to proceed at a significant rate, the phenol must be primarily in its deprotonated form, C3H5O (eg). In order to ensure that the CsHsOH(aq) is deprotonated, the reaction must be conducted in a buffered solution. On the number scale below, circle each pH for which more than 50 percent of the phenol molecules are in the deprotonated form (CoHsO (aq). Justify your answer. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Justification: (d) CeHsOH(ag) reacts with NaOH(ag). Write a net ionic equation representing this reaction (aka: invasion equation). (e) What is the pH of the resulting solution when 30 mL of 0.40 M CSH5OH(aq) is added to 25 mL of 0.60 M NAOH. Show all work…arrow_forward
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