Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Textbook Question
Chapter 15, Problem 15.13QE
Why have chemists not tabulated the fraction ionized for different acids? Such a table would make problems such as calculating the pH of an acid solution quite simple.
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In the laboratory, a general chemistry student measured the pH of a 0.386 M aqueous solution of ethylamine, C,H&NH, to be
12.094.
Use the information she obtained to determine the K, for this base.
K(experiment)-
In the laboratory, a general chemistry student measured the pH of a 0.587 M aqueous solution of trimethylamine, (CH,),N to be
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Use the information she obtained to determine the K, for this base.
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Here is
ph of the molarity of butyl chloride (C,H,CI) in a reaction vessel during a certain chemical reaction. Use this
graph to answer the questions in the table below.
у
0.030-
0.0247
olo
0.020-
Ar
M
0.015-
0.010-
0.005-
500
1000
1500
2000
2500
3000
seconds
created
x10
Is C,H,Cl being created or destroyed by the chemical
destroyed
reaction?
neither created nor destroyed
If C,H,Cl is being created or destroyed, what is the
rate at which it is being created or destroyed 1200
seconds after the reaction starts?
Explanation
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A student titrates samples of a base with a standardised acid. The titration values obtained for each sample is given in Figure 5. What is the average titration value in cm³ that the student should use in further calculations? *
Your answer
Chapter 15 Solutions
Chemistry: Principles and Practice
Ch. 15 - Prob. 15.1QECh. 15 - Can a compound be an Arrhenius base and not a...Ch. 15 - Water is not the only solvent that undergoes...Ch. 15 - Write two BrnstedLowry acid-base reactions and...Ch. 15 - Define pH and explain why pH, rather than...Ch. 15 - Prob. 15.6QECh. 15 - Prob. 15.7QECh. 15 - Prob. 15.8QECh. 15 - Prob. 15.9QECh. 15 - Prob. 15.10QE
Ch. 15 - Prob. 15.11QECh. 15 - Prob. 15.12QECh. 15 - Why have chemists not tabulated the fraction...Ch. 15 - Prob. 15.15QECh. 15 - Prob. 15.16QECh. 15 - Prob. 15.17QECh. 15 - Prob. 15.18QECh. 15 - Define oxyacid and give examples from among the...Ch. 15 - Prob. 15.20QECh. 15 - Prob. 15.21QECh. 15 - Prob. 15.22QECh. 15 - Prob. 15.23QECh. 15 - Prob. 15.24QECh. 15 - Prob. 15.25QECh. 15 - Write the formula and name for the conjugate acid...Ch. 15 - For each of the following reactions, identify the...Ch. 15 - Prob. 15.28QECh. 15 - Prob. 15.29QECh. 15 - Prob. 15.30QECh. 15 - Prob. 15.31QECh. 15 - Write an equation to describe the proton transfer...Ch. 15 - Prob. 15.33QECh. 15 - Determine the hydrogen ion or hydroxide ion...Ch. 15 - Prob. 15.35QECh. 15 - The hydroxide ion concentrations in wines actually...Ch. 15 - Prob. 15.37QECh. 15 - Prob. 15.38QECh. 15 - Prob. 15.39QECh. 15 - Prob. 15.40QECh. 15 - Prob. 15.41QECh. 15 - Prob. 15.42QECh. 15 - Prob. 15.43QECh. 15 - Prob. 15.44QECh. 15 - Prob. 15.45QECh. 15 - Prob. 15.46QECh. 15 - A saturated solution of milk of magnesia, Mg(OH)2,...Ch. 15 - Find [OH] and the pH of the following solutions....Ch. 15 - Write the chemical equation for the ionization of...Ch. 15 - Prob. 15.50QECh. 15 - Prob. 15.51QECh. 15 - Prob. 15.52QECh. 15 - Prob. 15.53QECh. 15 - Assuming that the conductivity of an acid solution...Ch. 15 - Prob. 15.55QECh. 15 - Prob. 15.56QECh. 15 - Prob. 15.57QECh. 15 - Prob. 15.58QECh. 15 - Prob. 15.59QECh. 15 - A 0.10 M solution of chloroacetic acid, ClCH2COOH,...Ch. 15 - Prob. 15.61QECh. 15 - Prob. 15.62QECh. 15 - Prob. 15.63QECh. 15 - Prob. 15.64QECh. 15 - Prob. 15.65QECh. 15 - Prob. 15.66QECh. 15 - Prob. 15.67QECh. 15 - Prob. 15.68QECh. 15 - Write the chemical equation for the ionization of...Ch. 15 - Prob. 15.70QECh. 15 - Hydrazine, N2H4, is weak base with Kb = 1.3 106....Ch. 15 - Prob. 15.72QECh. 15 - Prob. 15.73QECh. 15 - Prob. 15.74QECh. 15 - Calculate the [OH] and the pH of a 0.024 M...Ch. 15 - Prob. 15.76QECh. 15 - Prob. 15.77QECh. 15 - Prob. 15.78QECh. 15 - Prob. 15.79QECh. 15 - Prob. 15.80QECh. 15 - Find the value of Kb for the conjugate base of the...Ch. 15 - Consider sodium acrylate, NaC3H3O2. Ka for acrylic...Ch. 15 - Prob. 15.83QECh. 15 - Prob. 15.84QECh. 15 - Prob. 15.85QECh. 15 - Prob. 15.86QECh. 15 - Prob. 15.87QECh. 15 - Prob. 15.88QECh. 15 - Prob. 15.89QECh. 15 - Prob. 15.90QECh. 15 - Prob. 15.91QECh. 15 - Prob. 15.92QECh. 15 - Prob. 15.93QECh. 15 - Prob. 15.94QECh. 15 - Explain how to calculate the pH of a solution that...Ch. 15 - Prob. 15.96QECh. 15 - Prob. 15.97QECh. 15 - Prob. 15.98QECh. 15 - Hypofluorous acid, HOF, is known, but fluorous...Ch. 15 - Prob. 15.100QECh. 15 - Prob. 15.101QECh. 15 - Prob. 15.102QECh. 15 - Which of each pair of acids is stronger? Why? (a)...Ch. 15 - Prob. 15.104QECh. 15 - Prob. 15.105QECh. 15 - Prob. 15.106QECh. 15 - Prob. 15.107QECh. 15 - Prob. 15.108QECh. 15 - Prob. 15.109QECh. 15 - Prob. 15.110QECh. 15 - Prob. 15.111QECh. 15 - Prob. 15.112QECh. 15 - Prob. 15.113QECh. 15 - Prob. 15.114QECh. 15 - Prob. 15.115QECh. 15 - Prob. 15.116QECh. 15 - Prob. 15.117QECh. 15 - Prob. 15.118QECh. 15 - Prob. 15.119QECh. 15 - Prob. 15.120QECh. 15 - A solution is made by diluting 25.0 mL of...Ch. 15 - A Liquid HF undergoes an autoionization reaction:...Ch. 15 - Pure liquid ammonia ionizes in a manner similar to...Ch. 15 - Prob. 15.124QECh. 15 - Prob. 15.125QECh. 15 - Prob. 15.126QECh. 15 - Prob. 15.127QECh. 15 - Prob. 15.128QECh. 15 - An aqueous solution contains formic acid and...Ch. 15 - A solution is made by dissolving 15.0 g sodium...Ch. 15 - Calculate the pH of a solution prepared by adding...Ch. 15 - Prob. 15.132QECh. 15 - Prob. 15.133QECh. 15 - When perchloric acid ionizes, it makes the...Ch. 15 - Prob. 15.135QE
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- 7. Describe a buffered solution. Give three examples of buffered solutions. For each of your examples, write equations and explain how the components of the buffered solution consume added strong acids or bases. Why is buffering of solutions in biological systems so important?arrow_forwardThe equation for a reaction by which a solution of sodium carbonate may be standardized is 2HC7H5O2+Na2CO32NaC7H5O2+H2O+CO2. A student determines that 5.038g of HC7H5O2 uses 51.89mL of sodium carbonate solution in the titration. Find the molarity of the sodium carbonate.arrow_forwardA solution of sodium cyanide, NaCN, has a pH of 12.10. How many grams of NaCN are in 425 mL of a solution with the same pH?arrow_forward
- The indicator thymol blue changes from red to yellow between pH 1.2 and pH 2.8. If thymol blue is added to a solution, and the solution turns yellow, then the pH of the solution must be above 2.8, and the solution is basic. the pH of the solution must be above 2.8, and the solution is acidic. the solution is basic, and the pH must be at or below 1.2. the pH of the solution is above 2.8, and the solution could be acidic, neutral or basic. the solution is acidic, and the pH must be at or below 1.2.arrow_forward6. A stock solution of barium hydroxide was prepared by dissolving 4.71 g of barium hydroxide in 550. mL of water. A 63.0 mL portion of the stock solution was taken and diluted by adding 47.0 mL of water. Calculate the pH of the dilute solutionarrow_forwardA 0.1-L unbuffered solution needs the pH adjusted from 6.8 to 2. How many microliters of a 6 molar HCI solution need to be added to adjust the pH? Report your answer to four decimal places. For this question: • Assume the volume of HCI being added is negligible and the total volume of the solution does not change. • The volume of the solution is *not* 1 L like it was in the practice pools. • The question requests your answer be reported in uL (microliters)!arrow_forward
- The indicator thymol blue changes from red to yellow between pH 1.2 and pH 2.8. If thymol blue is added to a solution, and the solution turns yellow, then the pH of the solution must be above 2.8, and the solution is acidic. the solution is acidic, and the pH must be at or below 1.2. the solution is basic, and the pH must be at or below 1.2. the pH of the solution must be above 2.8, and the solution is basic. the pH of the solution is above 2.8, and the solution could be acidic, neutral or basic.arrow_forwardHow can buffer systems resist changing pH? use your own words to explainarrow_forwardUse the following information as a guide to help answer the next three questions. Your answer MUST be in the same format. Indicators can be used to help approximate the pH of a solution based on the indicator colour. Here is an example of how to word the pH approximation for bromothymol blue. Indicator Colour pH approximation Yellow 6.0 and below Green between .0 and 7.6 6. Blue 7.6 and above A Chemistry experiment is done where the pH of various solutions are tested, using indicators. The colours of indicators are recorded as shown below. Using the method outlined above in the example of bromothymol blue, indicate what the colours of the indicators tell us about the pH approximation of the solution. Values and wording are very important, so be precise. Be sure to word your pH approximation as outlined in the example. Indicator Colour pH approximation methyl red orange Indicator Colour pH approximation phenolphthalein colourless Indicator Colour pH approximation phenol red redarrow_forward
- The acidity of a solution is measured by its pH. If Ht represents the concentration of hydrogen ions (in moles/liter) in the solution, the pH is defined by pH - log Ht| Based on careful measurements and calculations, a chemist examines two solutions and asserts: "The hydrogen ion concentration of Solution A is 65.86% greater than the hydrogen ion concentration of Solution B." If the pH of solution B is 10.00, determine the pH of Solution A. Report your answer to two decimal places. Solution A has pH equal to Number (Report to the nearest 0.01)arrow_forwardCalculate the pH of the resulting solution if 31.0 mL of 0.310 M HCl(aq) is added to 41.0 mL of 0.310 M NaOH(aq). pH = Calculate the pH of the resulting solution if 31.0 mL of 0.310 M HCl(aq) is added to 21.0 mL of 0.410 M NaOH(aq). pH: = x10 TOOLSarrow_forwardA solution is prepared by adding 100 mL of 1.0 M HC,H,O,(aq) to 100 mL of 1.0 M NaC,H,O,(aq). The solution is stirred and its pH is measured to be 4.73. After 3 drops of 1.0 M HCl are added to the solution, the ph of the solution is measured and is still 4.73. Which of the following equations represents the chemical reaction that accounts for the fact that acid was added but there was no detectable change in pH? (A) H;O*(aq) + OH (aq) → 2 H,O(1) (B) H;O*(aq) + CI (aq) → HCI(g) + H,O(1) (C) H,O*(aq) + C,H,O, (aq) → HC,H,0,(aq) + H,0(1) (D) H;O*(aq) + HC,H,O,(aq) - H,C,H,0,*(aq) + H,O()arrow_forward
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