Q: 1. When comparing two compounds, the compound with smaller pka value means that it is
A: pKa = -log Ka log Ka = -pKa Ka = 10-pKa
Q: Calculate pKa values from the following Ka’s and vice versa: a. Nitromethane, Ka = 5.0 x 10^-11 b.…
A:
Q: The ESI-MS spectrum in positive ionization mode for lysozyme is obtained. a. What is the molecular…
A: a) 1789.2 = (MW + nH+)n 1590.6 =[MW + (n+1)H+](n+1) n(1789.2) - nH+ = (n+1)1590.6 - (n+1)H+…
Q: pka - 4.15 pКa ~ 2.16 O. NH, C pКa ~ 9.58 The structure as drawn shows the molecule having all of…
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Q: The Ka for an acid is 7.91 x 10-29. Calculate the pKa for this acid.
A: The pKa for the acid is to be calculated
Q: What is the pKa of an acid? As the pKa value increases, does the acid strength increase or…
A: The pKa value is method used for indicate the strength of an acid. pKa is the negative log of the…
Q: 3. What is the value of the index of hydrogen deficiency of aspartame, shown below? ÓH NH2
A:
Q: The K, for acetic acid (CH,COOH) is 1.737 x 10-. What is the pK for this acid? pKa = Use the…
A: 1) Ka(CH3COOH) = 1.737 x 10-5 pKa = -logKa = -log(1.737 x 10-5) pKa =…
Q: Acids and Bases Indicate the approximate pKa values of the protons labelled a-e in the molecule…
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Q: The Ka for an acid is 4.45 x 10-10. Calculate the pKa for this acid.
A: Ka = 4.45 x 10-10
Q: Ka for acetic acid is 1.8 x 10-5. What is the first digit of the pKa value for acetic acid?
A: Ka is a dissociation constant of acid Here the acid is given acetic acid Formula for pKa = -log ka…
Q: Predict the pKa of the following compounds and calculate the fraction present in ionized form at pH…
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Q: Which bases can deprotonate acetylene? The pKa values of the conjugate acids are given in…
A: A base accepts a proton to give its conjugate acid.
Q: Ka for boric acid is 7.3 x 10¯10. What is the pKa of boric acid? A 4.86 B 9.14 C 8.66…
A: Using relation between ka and pKa , we wi calculate pKa .
Q: allergic to the odor of ammonia. You smelled an ammonia solution with the pH 9.3 yesterday and it…
A:
Q: Two pKa values are reported for malonic acid, a compound with twoCOOH groups. Explain why one pKa is…
A: The strength of an acid is determined by pKa values. Lesser acidic acid has more pKa and more acidic…
Q: 1. 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…
A: Ka is called the acid ionization constant. Strong acid has high value of Ka and weaker acid has…
Q: Arsenic acid (H3AsO4) is a triprotic acid with 3 pKa values (2.24, 6.96, and 11.50). What is the Kb…
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Q: From memory, write the estimated pK, values for the protons shown. 2. н Он н н H2N ОН
A: pKa is introduced as an index to express the acidity of weak acids. pKa value of acid is inversely…
Q: Find the suitable base for the following reaction: CH,C(-0)CH, + :B – CH,C(=O)CH: + H:B", The pka…
A: pKa is defined as the negative logarithm of Ka. That is, pKa=-log(Ka) And, Ka measures the strength…
Q: 3. The pKa,1 and pKa,2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below:…
A: Here we have to explain the difference between pKa value of phthalic acid and terephthalic acid.
Q: Which of the following is the primary and secondary species of EDTA at pH 2.05? (a) H&Y*, HsY* (d)…
A: EDTA is ethylene diammine tetraacetic acid. PH is defined as negative logarithm of hydrogen ions…
Q: Ka for acetic acid is 1.8 * 10-5. What is the first digit of the pKa value for acetic acid?
A: pKa value indicates the strength of an acid. The more the value of pKa, the more acidic will be the…
Q: 6. Carbonic acid (H2CO3) has two ionizable protons, with pKa around 6.1 and 10.2. (a) Which species…
A:
Q: 6. The pka of formic acid is 3.750. What is the Ka of formic acid?
A: The answer to Question No. 6 is given as -
Q: What is the pH of a solution containing 0.876 mol L-1 of HCl and 1.069 mol L-1 of a weak acid with…
A: Strong acid dissociate completely so, the H+ concentration is more in the solution. And weak acid…
Q: What is the Ka of an acid that has a pKa value equal to 3.93?
A: The pKa value as the negative logarithm of the Ka value: pKa = -log Ka. If we already know the pKa…
Q: Q16. Identify the two acid/conjugate base and base/conjugate acid pairs in the following acid/base…
A: Given : Reactants and products of acid base reaction. To find : Conjugate acid and conjugate Base…
Q: The K, for acetic acid (CH,COOH) is 1.737 × 10-5. What is the pK, for this acid? pKa = Use the…
A: We know that, pKa is the negative logarithm of Ka. i.e. pKa= -logKa We have, Ka…
Q: Explain the difference in acidity between p-methoxybenzoic acid (pKa = 4.46) and m-methoxybenzoic…
A: Methoxy group has both +R effect due to the lone pair of electrons present on the oxygen atom and -I…
Q: Explain the observed difference in the pKa values of the conjugate acids of amines A and B.
A: From the pka value of A we can tell that the among the two compounds given A is more stable than B…
Q: | Verizon 4:05 PM O 75% Question 2 of 7 Submit Which of the following is the correct expression for…
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Q: B: At 25°C, what is the hydronium ion concentration in the following with discussing your result:-…
A: A)For the weak acid H+= √ka×C B) Given molecule is salt mixture of weak acid and strong base. So…
Q: Explain why the pKa of compound A is lower than the pKa's of bothcompounds B and C.
A: The pKa value is basically of method used to indicate the strength of an acid and also known as…
Q: Match the pKa values to the appropriate compound. pKa values: 0.28, 1.24, 2.66, 2.86, and 3.12.…
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Q: If the pKa of an acid is 3.7, what is the Kb value of the acid?
A:
Q: Find the pKa.pKa. For an acid HA, the concentrations of HA and A- A are 0.075 and 0.025,…
A: Given Values: Concentration of HA = 0.075 M Concentration of A- = 0.025 M pH of the buffer = 6.0
Q: Predict the pKa of the following compounds and calculate the fraction present in ionized form at pH…
A: Given compounds: 3,4 DMA & 2,4,5-T (herbicide) To predict The pka of the given compounds and…
Q: Phenolphthalein has a pKa of 9.7 and is colorless in its acid form and pink in its basic form. For…
A: Given value from the question, pH= 7.7 pka=9.7
Q: What is the [A-]/[HA] concentration ratio required to obtain a pH 5.3, given that the pka of HA is…
A: The pH of a buffer (HA/A-) is determined using Henderson-Hasselbalch equation- pH = pKa +…
Q: If the pKa of a weak acid is 3.74, what is the Ka of the acid? Show all work/calculations.
A: GIven, pKa = 3.74
Q: pKa values are different in different solvents. For example, the pKa of hydrofluoric acid (HF) in…
A: Acid dissociation constant, Ka is a measure of acid strength. Higher the Ka, higher will be the acid…
Q: Benzoic acid has a pKa = 4.20 at a pH of 6.20 the ratio [A-]/[HA] is what? O 1:100 1:50 1:10 1:1
A:
Q: Two pKa values are reported for malonic acid, a compound with two COOH groups. Explain why one pKa…
A: pKa is inversely related to the acidic strength of the compound or Ka value which means greater the…
Q: A pka - 4.15 pКa ~ 2.16 O. NH, C pka - 9.58 The structure as drawn shows the molecule having all of…
A: We have to calculate the net charge at the physiological pH .
Q: Q16. Identify the two acid/conjugate base and base/conjugate acid pairs in the following acid/base…
A: A base is the one that abstracts the acidic proton from the substrate because it consists of a lone…
Q: kb = 1.8 x 10-5 What is pkb, pka, and ka when kb is given
A: Given in formation is as follows: Kb = 1.8×10-5 Where, Kb is the dissociation constant of a base.…
Q: 1. Given the following table of AH, a. Calculate AH for the reaction (14): 2 NaF + MgS - Na,S + MgF,…
A: Given reaction is -> 2NaF + MgS -> Na2S + MgF2
Q: 4. 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…
A: A strong acid is completely dissociated in an aqueous solution. On the other hand, a weak acid is…
Calculate Ka values from the following pKa’s:
(a) Acetone, pKa 5 19.3 (b) Formic acid, pKa 5 3.75
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- (b)Given the Ka and pKa values of the following compounds: Hydrobromic acid (HBr), K= 1.0 x 10°; Acetic acid (CH3COOH), K. =1.75 x 10$; ethyl alcohol (CH3CH;OH), pKa = 15.9 ; Ammonia (NH), pK = 36 %3D %D (1) Calculate the Ka value of CH3CH:OH and NH3 (ii) Evaluate which of the conjugate base of the following acids in Q1 (b) is the strongest base. Justify your answer (iii) Calculate at what pH is the concentration of acetic acid (CH3COOH), 10 times greater in its acidic form than basic form?conjugate base acid Methyl Acetylene Isopropanol pKa pKa 1) Consider the reaction AH + H₂O ± A:0 + H3O+. For the following named acids: a) draw the structure of the acid, b) give the approximate pKa value of the acid in multiples of 5, c) give the name of the conjugate base, and d) draw the structure of the conjugate base. Ethyl Acetoacetate pKa Butanoic acid pKaThe following compares the alpha plots for two weak monoprotic acids. 1.0 a 0.5 0 1.0 a 0.5 2 4 4 6 6 pH PH 8 O 8 10 12 14 10 12 14 acid 1 acid 2 (1) The protonated form of each acid is represented by (2) The approximate pKa value for acid 1 = (3) The stronger acid is
- 23a, no need to explain too muchWhich of the following has the lowest pKa value ?Most of the pKa values given in this text were determined in water. How would the pKa values of carboxylic acids, alcohols, ammonium ions (RNH32) , phenol, and an anilinium ion (C6H5NH32) change if they were determined in a solvent less polar than water?
- Explain why is FAAS a good method of quantifying Ca in milk?2.Explain why the pKa values of the indicated hydrogen atoms change for these three compounds. n f f H H H pka = 50 pka = 20 pKa = 10Conjugate acid base pKa 2) Consider the reaction B: () + H3O+ →>> BH(+) + H2O. For the following named bases: 1) draw the structure of the base, 2) draw the structure of the conjugate acid, 3) give the name of the conjugate acid, and 4) give the approximate pKa of the conjugate acid (±1 pKa unit). For the purposes of answering this question you may use pKa values evenly divisible by 5. t-Butoxide anion p-Toluenesulfonate anion Triethylamine t-Butanol pKa pKa pKa
