Organic Chemistry, Books a la Carte Edition (8th Edition)
8th Edition
ISBN: 9780134074580
Author: Bruice, Paula Yurkanis
Publisher: PEARSON
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Chapter 2, Problem 65P
a. Given the Ka values, estimate the pKa value of each of the following acids without using a calculator (that is, is it between 3 and 4, between 9 and 10, and soon?):
- 1. nitrous acid (HNO2), Ka = 4.0 × 10–4
- 2. nitric acid (HNO3), Ka = 22
- 3. bicarbonate (
- 4. hydrogen cyanide (HCN), Ka. = 7.9 × 10–10
- 5. formic acid (HCOOH), Ka = 2.0 × 10–4
- 6. phosphoric acid (H3PO4), Ka = 2.1
b. Determine the exact pKa values, using a calculator.
c. Which is the strongest acid?
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Students have asked these similar questions
The pKa value is ammonia is 9.3. You are allergic to the odor of ammonia. You smelled an ammonia solution with the pH 9.3 yesterday and it was OK. Now you tried to smell the same solution but with the pH of 8.3. What will happen to your allergy symptom? How much better or worse it will be compared to yesterday? (e.g., ~5 times better or worse).
How to find the Ka and pKa? Can you answer it with brief steps?
The three pKa’s for phosphoric acid (H3PO4) are 2.1, 6.9, and 12.4. At what pH does [H3PO4] =[H2PO4-]?
A. pH 2.1B. pH 4.6 C. pH 6.9D. pH 12.4
Chapter 2 Solutions
Organic Chemistry, Books a la Carte Edition (8th Edition)
Ch. 2.1 - Which of the following are not acids? CH3COOH CO2...Ch. 2.1 - Consider the following reaction: a. What is the...Ch. 2.1 - Draw the products of the addbase renc1 ion when a....Ch. 2.1 - a. What is the conjugate acid of each or the...Ch. 2.2 - a. Which is a stronger acid: one with a pKa of 5.2...Ch. 2.2 - An acid has a Ka of 4.53 106 in water. What is...Ch. 2.2 - Prob. 7PCh. 2.2 - Antacids are compounds that neutralize stomach...Ch. 2.2 - Are the following body fluids acidic or basic? a....Ch. 2.3 - Draw the conjugate acid of each of the following:...
Ch. 2.3 - a. Write an equation showing CH3OH reacting as an...Ch. 2.3 - Estimate the pKa values of the following...Ch. 2.3 - a. Which is a stronger base: CH3COO or HCOO? (The...Ch. 2.3 - Using the pKa values in Section 2.3, rank the...Ch. 2.4 - Prob. 15PCh. 2.5 - a. For each of the acid-base reactions in Section...Ch. 2.5 - Ethyne has a pKa value of 25, water has a pKa...Ch. 2.5 - Which of the following bases can remove a proton...Ch. 2.5 - Calculate the equilibrium constant for the...Ch. 2.6 - Rank the ions (CH3, NH2, HO, and F) from most...Ch. 2.6 - Rank the carbanions shown in the margin from most...Ch. 2.6 - Which is the stronger acid?Ch. 2.6 - Prob. 23PCh. 2.6 - What reaction in Problem 23 has the smallest...Ch. 2.6 - Rank the halide ions (F, Cl, Br, and l) from...Ch. 2.6 - a. Which is more electronegative, oxygen or...Ch. 2.6 - Which is a stronger acid? a. HCl or HBr b....Ch. 2.6 - a. Which of the halide ions (F, Cl, Br, and l) is...Ch. 2.6 - Which is a stronger base? (The potential maps in...Ch. 2.7 - What is a stronger acid? a. CH3OCH2CH2OH or...Ch. 2.7 - Rank the following compounds from strongest add to...Ch. 2.7 - What is a stronger base?Ch. 2.8 - For each of the following compounds, indicate the...Ch. 2.8 - Prob. 35PCh. 2.8 - Which is a stronger acid? Why?Ch. 2.8 - Fosamax (shown on the previous page) has six...Ch. 2.9 - Using the table of pKa values given in Appendix I,...Ch. 2.10 - For each of the following compounds (here shown in...Ch. 2.10 - As long as the pH is not less than _______, at...Ch. 2.10 - a. Indicate whether a protonated amine (RN+H3)...Ch. 2.10 - A naturally occurring amino acid such as alanine...Ch. 2.10 - a. At what pH is the concentration of a compound,...Ch. 2.10 - For each of the following compounds, indicate the...Ch. 2.10 - Given the data in Problem 47: a. What pH would you...Ch. 2.11 - Write the equation that shows how a buffer made by...Ch. 2.12 - Draw the products of the following react ions. Use...Ch. 2.12 - What product are formed when each of the following...Ch. 2 - Which is a stronger base? a. HS or HO b. CH3O or...Ch. 2 - According to the explanations by Lewis, if a...Ch. 2 - a. Rank the following alcohols from strongest to...Ch. 2 - a. Rank the following carboxylic acids from...Ch. 2 - Prob. 57PCh. 2 - For the following compound. a. draw its conjugate...Ch. 2 - Rank the following compounds from strongest to...Ch. 2 - Prob. 60PCh. 2 - Prob. 61PCh. 2 - a. Rank the following alcohols from strongest to...Ch. 2 - A single bond between two carbons with different...Ch. 2 - For each compound, indicate the atom that is most...Ch. 2 - a. Given the Ka values, estimate the pKa value of...Ch. 2 - Tenormin, a member of the group of drugs known as...Ch. 2 - From which of the following compounds can HO...Ch. 2 - a. For each of the following pairs of reactions,...Ch. 2 - Prob. 69PCh. 2 - Which is a stronger acid? a. b. c. d.Ch. 2 - Prob. 71PCh. 2 - Prob. 72PCh. 2 - Given that pH+ pOH = 14 and that the concentration...Ch. 2 - How could you separate a mixture of the following...Ch. 2 - Prob. 75PCh. 2 - a. If an add with a pKa of 5.3 is in an aqueous...Ch. 2 - Calculate the pH values of the following...Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Which of the reactions in Problem 3 favor...Ch. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Which is the stronger acid? a. ClCH2CH2OH or...Ch. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Which is a more stable base? Remembering that the...Ch. 2 - Which is the Stronger acid?Ch. 2 - Prob. 13PCh. 2 - a. Draw the structure of (CH3COOH (pKa = 4.7) at...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Use a calculator when necessary to answer the following questions. a. What is the pKa for each Ka: 10−10, 10−21, and 5.2 × 10−5? b. What is the Ka for each pKa: 7, 11, and 3.2?arrow_forward4. Acid A has a pKa value of 5.71, and acid B has a pKa value of 5.30. Which of the two acids is the weaker?arrow_forwardThe table below contains the pKa values of four weak acids. Which acid is the weakest? HF 3.14 HNO2 3.39 H2SO3 1.81 H2CO3 6.37arrow_forward
- Given the following pKa values, which is the strongest base of those listed in the answers? HNO2 (pKa = 3.37) HE (pKa = 3.45) HIO3(pKa-0.77) HBRO (pKa 8.69) HCN (pKa 9.31) A CN OB. 103 Bro D. NO2 E Farrow_forwardCalculate the pKa value for each of the following acids: Remember to use the rules for significant figures in reporting your answer. a) Phosphoric acid (H3PO4), ??=4.5×10−4Ka=4.5×10−4 pKa = b) Propanoic acid (HC3H5O2), ??=1.3×10−5Ka=1.3×10−5 pKa =arrow_forwardAssuming that base (B:) and acid (AH) are mixed in equal concentrations and using pKa values of acid AH 3.5 and pka value of conjugate acid for the base BH 5.5 calculate what percent of BH will appear in this reaction once the equilibrium is reached. Answer is numerical. Round the answer to the nearest whole number. Don't write % symbol in the answer.arrow_forward
- If the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid? Include the answer to 3 significant figuresarrow_forwardA weak acid, HA, has a pka = 6.78. If one dissolved 0.898 moles of a salt containing one mole equivalent of the conjugate base of the weak acid (e.g. NaA where A is the conjugate base of the weak acid) into 1 Liter of water, then what would be the resulting pH?arrow_forwardThe Ka for an acid is 7.91 x 10-29. Calculate the pKa for this acid.arrow_forward
- If an acid, HA, is 10.8% dissociated in a 1.0 M solution, what is the Ka for this acid? a. 1.3 × 10–2 b. 1.1 × 10–1 c. 1.2 × 10–1 d. none of these e. 7.6 × 101arrow_forwardQ16. Identify the two acid/conjugate base and base/conjugate acid pairs in the following acid/base reaction: ] Using Evan's pKa table, assign a pka value to the acid and conjugate acid species on the opposite side of the reaction arrow. Use the assigned pka values to predict if the preferred direction for this reaction is forward or backwards. Et;N or + + MeO OMe Et,NH MeO OMearrow_forwardSome weak acids and their pKa values are given below. Which one of these acids will have the STRONGEST conjugate base? Select one: a. Phenol; pKa = 10.00 b. Methanoic acid; pKa = 3.75 c. Bromoethanoic acid; pKa = 2.9 d. Methanol; pKa = 15.54arrow_forward
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