ORGANIC CHEM.-S.M.+STD.GDE(LL)-W/ACCESS
8th Edition
ISBN: 9780134777658
Author: Bruice
Publisher: PEARSON
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Question
Chapter 2, Problem 75P
Interpretation Introduction
Interpretation:
Whether the carbonic acid/bicarbonate buffer is better at neutralizing excess acid or base and maintains the
Concept Introduction:
Important formulae regarding acid-base concepts are:
Henderson-Hasselbalch equation
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A naturally occurring amino acid such as alanine has a group that is a carboxylic acid and a group that is a protonated amine. a. If the pKa value of a carboxylic acid such as acetic acid is about 5 (see Table 2.1), then why is the pKa value of the carboxylic acid group of alanine so much lower? b. Draw the structure of alanine in a solution at pH = 0. c. Draw the structure of alanine in a solution at physiological pH (pH 7.4). d. Draw the structure of alanine in a solution at pH = 12. e. Is there a pH at which alanine is uncharged (that is, neither group has a charge)? f. At what pH does alanine have no net charge (that is, the amount of negative charge is the same as the amount of positive charge)?
please find Ka values of Succinic Acid (C4H6O4)
Citrus fruits are rich in citric acid, a compound with three COOH groups. Explain the following:
a. The first pKa (for the COOH group in the center of the molecule) is lower than the pKa of acetic acid.
b. The third pKa is greater than the pKa of acetic acid.
Chapter 2 Solutions
ORGANIC CHEM.-S.M.+STD.GDE(LL)-W/ACCESS
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
- What is the lowest pH buffer that could effectively be made with a weak acid that has a pK a of 5.418?arrow_forwardDraw the predominant form for glutamate in a solution with the following pH: a. 0 b. 3 c. 6 d. 11arrow_forwardCitrus fruits are rich in citric acid, a compound with three COOH groups. Explain the following:a. The first pKa (for the COOH group in the center of the molecule) is lower than the pKa of acetic acid.b. The third pKa is greater than the pKa of acetic acid.OHOCOHCCOOHC pKa = CH2 CH2 4.5 pKa = 5.8 pKa = 3.1arrow_forward
- An unknown compound, X, is thought to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of0.1 M NaOH is added to 100 mL of a 0.1 M solution of X at pH 2.0, the pH increases to 6.72. Calculate the pKa of the second ionizable group of Xarrow_forwardCitric acid, a triprotic acid, has 3 pKa values (3.128, 4.761, and 6.396). What is the pKb of trisodium citrate? 1.34 x 10–11 7.604 10.872 9.239arrow_forwardA naturally occurring amino acid such as alanine has a group that is a carboxylic acid and a group that is a protonated amine. The pKa values of the two groups are shown.(a). If the pKa value of a carboxylic acid such as acetic acid is about 5, then why is the pKa value of the carboxylic acid group of alanine so much lower? (b). Draw the structure of alanine in a solution at pH = 0. (c). Draw the structure of alanine in a solution at physiological pH (pH 7.4).(d). Draw the structure of alanine in a solution at pH = 12. (e). Is there a pH at which alanine is uncharged (that is, neither group has a charge)? (f) At what pH does alanine have no net charge (that is, the amount of negative charge is the same as the amount of positive charge)?arrow_forward
- What is the K a of an acid whose pK a is 8.60?arrow_forwardCitrus fruits are rich in citric acid, a compound that has 3 functional groups "carboxylic acid". Explain the following: a) Why is the first pKa (the COOH group at the center of the molecule) less than the pKa of acetic acid? b) Why is the third pKa greater than the pKa of acetic acid?arrow_forwardThe Ka of a acetic acid is 1.7 x 10-5. What is the pKa of acetic acid?arrow_forward
- You wish to prepare an HC2H3O2 buffer with a pH of 4.24. If the pKa of is 4.74, what ratio of C2H3O2/HC2H3O2 must you use?arrow_forwardGiven that C6H11COOH has a pKa = 4.8 and C6H11N+H3 has a pKa = 10.7, What pH would you make the water layer to cause the carboxylic acid to dissolve in the water layer and the amine to dissolve in the water layer?arrow_forwardA glycylglycine buffer is made to a pH of 8.45 at 25 ∘C then warmed to 37 ∘C. The pH of the solution changes because of the pKa changes. Glycylglycine has a p?a=8.26 and a Δp?a/Δ?=−0.026 °C−1. Calculate the pH of the buffer at 37 ∘C.arrow_forward
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