Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 2SYK
To become proficient in the use of the concepts relating to pH, develop a concept map to organize your understanding of the following terms: pH, [H+], [OH−], acidic, basic, neutral, buffer, 0-14, acid-base pair. Remember to label connecting lines and add additional concepts as you need them.
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Refer to the following titration curve below:
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Volume of Titrant / mL
- Unknown Acid 0.10 mol/L - titrant = NaOH 0.1 mol/L
What is the isoelectric point of histidine, according to the
titration curve? Input your answer until the first decimal point.
2.
9,
Which of the following match buffer solution:A- Consists of a mixture of a weak acid and its conjugate baseB- Can resist change in pH when small to moderate amounts of weak acid or weak base is addedC- Can resist change in pH when large amounts of strong acid or strong base are addedD- Consists of a mixture of a strong acid & its conjugate baseE- Can resist change in pH when small to moderate amounts of weak acid or strong base are added
This is all part of one question. It goes together. (I wrote D and E that were cut off from the picture.) Please help me solve this since it all follows a line.D. At which pH value does the amino group of amino acid have the best buffering capacity?9.009.691.536.013.0010.5E. What is the pI (isoelectric point)?pI=
Chapter 3 Solutions
Study Guide for Campbell Biology
Ch. 3 - Draw the four water molecules that can...Ch. 3 - The following concept map is one way to show how...Ch. 3 - Prob. 3IQCh. 3 - Complete the following table to review your...Ch. 3 - Prob. 5IQCh. 3 - a. Add to the formula in Interactive Question 3.5...Ch. 3 - Fill in the following table, which summarizes the...Ch. 3 - To become proficient in the use of the concepts...Ch. 3 - Each water molecule is capable of forming a. three...Ch. 3 - The properties of water make it an ideal and...
Ch. 3 - What accounts for the movement of water up the...Ch. 3 - Climates tend to be moderate near large bodies of...Ch. 3 - You have three flasks containing 100 mL of...Ch. 3 - A burn from steam at 100C is more severe than a...Ch. 3 - Evaporative cooling is a result of a. the release...Ch. 3 - Prob. 8TYKCh. 3 - Prob. 9TYKCh. 3 - Prob. 10TYKCh. 3 - Prob. 11TYKCh. 3 - Prob. 12TYKCh. 3 - Prob. 13TYKCh. 3 - Consider two solutions labeled A and B. Solution A...Ch. 3 - What does a buffer do? a. moderates pH changes b....Ch. 3 - Prob. 16TYKCh. 3 - Prob. 17TYKCh. 3 - Prob. 18TYK
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- pH expresses the molar concentration of hydronium ions in an aqueous solution on a logarithmic scale. (Note that it is common to use the hydrogen ion, H*, to represent the hydronium ion, H3O+.) pH = -log[H3O+] [H3O+] = 10-PH As pH decreases, acidity increases. As pH increases, acidity decreases. • Acidic solution: pH 7 Part A - Calculating pH Submit [H₂0+] 1 Acidic pH 01 10¹ 102 103 104 105 106 107 108 109 10-10 10-11 10-12 10-13 10-14 stomach acid 3 wine lemon tomatoes juice vinegar, black soft drinks, coffee beer 6 Neutral urine milk 7 human blood pure water sea- water baking soda 10 11 12 13 14 milk of magnesia house- hold ammonia oven cleaner Basic household bleach Adapted from Biological Science by Freeman ©2008 Pearson Education, Inc. What is the pH of an aqueous solution with the hydronium ion concentration [H3O+] = 2 x 10-14 M? Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3. ►…arrow_forwardexplain the importance of pH for the environment in your own wordsarrow_forwardExplain what pH, acids, and bases are, and describe the pH scale; discuss what each pH number means and describe how buffers can stabilize pHarrow_forward
- What is the pH of a buffer of a buffer system that contains a weak acid of .19 M and conjugate base of .12 M ? The Ka of the acid is 5.6x 10 -6 pH= pKa + log ( [A- ]/[HA]) please show me step by steparrow_forwardThree buffers are made by combining a 1M solution of acetic acid and a 1M solution of sodium acetate in the ratios shown in the table below. Which of these statements is true regarding the prepared buffers? (Ka= 1.7x10-5) pH of buffer 1 < pH of buffer 2 < pH of buffer 3 pH of buffer 1 = pH of buffer 2 = pH of buffer 3 pH of buffer 1 > pH of buffer 2 > pH of buffer 3 pH of buffer 1 = pH of buffer 2 > pH of buffer 3 pH of buffer 1 > pH of buffer 2 = pH of buffer 3arrow_forwardYou have just added substance X to a glass of water. The pH of the water changed from 7 to 4. you conclude that substance X is a because it caused the amount of H+ ions in the water to for each choice, the item in front of the semicolon (;) goes into the first space. the item behind the semicolon goes into the second space. for example if a choice says- "buffer; increase", buffer goes into 1st space and increase goes into 2nd space buffer; neither increase or decrease base; decrease base; increase acid; decrease O acid; increasearrow_forward
- Butanoic acid (C3H7COOH) is described as a weak acid. Define the term weak acidarrow_forwardA researcher prepares 100 mL of aqueous solution containing 0.1 g of a protein. The researcher then uses an experimental apparatus ,where he notes that, at room temperature (300K) and atmospheric pressure (101.325 kPa), distilled water flows naturally into the solution compartment. However, when he applies an extra pressure of 1000 Pa he observes that the flow of distilled water ceases and the system is in balance. Calculate the molar mass of this protein, in kDa (1 Da = 1 g/ mol); Why does the flow of distilled water cease with the application of the pressure of 1000 Pa? Explain in terms of potential chemicals. %3Darrow_forwardThe following are basic building blocks of macromolecules match the building blocks with the statements below.arrow_forward
- A researcher is preparing a reaction mixture to test the activity of a protein. They combine at room temperature the required reaction components, which contained in a final 150 ml volume 200 mM NaCl and unknown concentrations of weak acid and conjugate base of a buffer compound. They are using a pH meter to determine the acidity of the solution and observe the following pH value that is displayed by the device. Can you determine the hydrogen ion [H+] concentration of the solution? Provide the value with three decimal places and an appropriate unit in the answer box. Note: You may need to round the numbers to get the required answer. N 3.35arrow_forwardRefer to the following titration curve below: 13 12 11 10 7 5 4 3 2 8 10 12 14 16 18 20 22 24 26 28 30 Volume of Titrant / mL Unknown Acid 0.10 mol/L - titrant = NaOH 0.1 mol/L How many buffering regions are present in the titration curve of the amino acid?arrow_forwardIf the pH is 2, what is the %HA at of a molecule has a pka = 6? Report the answer to one decimal place. Your Answer: Answer unitsarrow_forward
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