Worksheet 4-Acid Base

3

Interconverting Ka and pKa-

Don't used hand raiting

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Please correct answer and don't use hand raiting

PLease help me find the right answer please be sure to express your answer in a chemical formula

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 figures

Please answer all parts.

a) If the Kb of a weak base is 4.7E-9, what is the Ka of its conjugate acid? Do not include any units with your answer. Your answer should have two significant figures. For scientific notation use the same as that in the problem (i.e. 3.3E-2 is the same as 3.3 x 10-2). b) Diethylamine, (CH3CH2)2NH, has a Kb of 8.6 x 10-4. What is the pH of a 0.22 M solution of diethylammonium chloride, [(CH3CH2)2NH2]Cl? Your answer should be to two places past the decimal point.

Assuming 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.

You are diligently doing an assignment  when a question comes up that had a pH of -1. Is this likely a typo by a tired instructor, or is this number indeed possible? Explain clearly, using an example if need.

Can you help me part 3

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What is the conjugate base of HSO4−? Express your answer as a chemical formula.   What is the formula that I need for this problem

lem 10.10 -Enhanced - with Feedback Part A Enter the formula of the conjugate base for the acid H2PO4. Express your answer as a chemical formula. ΑΣφ a Xh 1L ↑

1. Compare your pKa, Ka and molar mass from your experiment to the expected values for KHP. How well do they compare? What might account for the differences? 2. Based on your results in Part 1, is the method used reliable in determining pKa, Ka and molar mass of a weak acid? Explain. 3. Discuss your thinking on how you determined the identity of your unknown. Were there two (or more) acids that were difficult for you to distinguish between? If so, how did you makeyour final decision?

1. Compare your pKa, Ka and molar mass from your experiment to the expected values for KHP. How well do they compare? What might account for the differences? 2. Based on your results in Part 1, is the method used reliable in determining pKa, Ka and molar mass of a weak acid? Explain. 3. Discuss your thinking on how you determined the identity of your unknown. Were there two (or more) acids that were difficult for you to distinguish between? If so, how did you makeyour final decision?

1. Compare your pKa, Ka and molar mass from your experiment to the expected values for KHP. How well do they compare? What might account for the differences? 2. Based on your results in Part 1, is the method used reliable in determining pKa, Ka and molar mass of a weak acid? Explain. 3. Discuss your thinking on how you determined the identity of your unknown. Were there two (or more) acids that were difficult for you to distinguish between? If so, how did you makeyour final decision?

Hello, my Organic Chemistry 1 question is shown in the attached image.

pleaseee please answer quickly!

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Solve correctly please. (Gpt/Ai wrong answer not allowed)

Calculate at what pH about 80% of 2-naphthol (pKa = 9.5) will be found in the ionized form in aqueous solution. Write your answer in numerical form with one diciminal digit (e.g. 1.1) Answer:

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When the pH is more than two (2) pH units BELOW the pKa of an amine group (e.g. -NH2), what form is the chemical group in? Select BOTH the number of hydrogens and its charge (check two boxes) no hydrogens (0 H) one hydrogen (1 H) Otwo hydrogens (2 H) three hydrogens (3 H) positive charge (+) neutral charge (0) negative charge (-)

. Suppose you have already compared the pH values of two substances using 0–14 paper. When would a follow-up test using 4.5 – 7.5 paper be most helpful?           When both substances had a pH value of about 3 on the 0 – 14 paper.         When both substances had a pH value of about 6 on the 0 – 14 paper.             When both substances had a pH value of about 9 on the 0 – 14 paper

== 4) Arrange the following compounds in the order of increasing acidity (use a table for pKa Values). Also, understand the pKa scale -15 to ~ 60, water has a pKa of ~15. pKa scale is similar to pH scale although pKa scale is larger than pH scale. Try to understand the pKa scale trend which is similar to pH scale. Please read and study power point slides in pages # 43 to 46. (2 points) Butane, 1-Butanol, water, acetic acid, 1-Butyne, 2-butene, hydrochloric acid 3

Conjugate base acid 1a. Consider the reaction AH(+) + H₂O →> A:(-) + H3O+). For the following named acids: a) draw the structure of the acid, b) give the approximate pKa of the conjugate acid in units of 5, c) give the name of the conjugate base, and d) draw the structure of the conjugate base. Dimethyl sulfoxide pKa Acrylic Acid pKa Ethyl Acetate pKa Benzamide pKa