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Science
Chemistry
What is the molarity of a solution made by dissolving 1.250 grams of NazCo3 in H20 to make 100.0 mL of solution?
What is the molarity of a solution made by dissolving 1.250 grams of NazCo3 in H20 to make 100.0 mL of solution?
BUY
Chemistry: Principles and Reactions
8th Edition
ISBN:
9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
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1 Matter And Measurements
2 Atoms, Molecules, And Ions
3 Mass Relations In Chemistry; Stoichiometry
4 Reactions In Aqueous Solution
5 Gases
6 Electronic Structure And The Periodic Table
7 Covalent Bonding
8 Thermochemistry
9 Liquids And Solids
10 Solutions
11 Rate Of Reaction
12 Gaseous Chemical Equilibrium
13 Acids And Bases
14 Equilibria In Acid-base Solutions
15 Complex Ion And Precipitation Equilibria
16 Spontaneity Of Reaction
17 Electrochemistry
18 Nuclear Reactions
19 Complex Ions
20 Chemistry Of The Metals
21 Chemistry Of The Nonmetals
22 Organic Chemistry
23 Organic Polymers, Natural And Synthetic
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Chapter Questions
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Problem 1QAP: Write a net ionic equation for the reaction between aqueous solutions of (a) ammonia and...
Problem 2QAP: Write a net ionic equation for the reaction between aqueous solutions of (a) sodium acetate...
Problem 3QAP: Write a balanced net ionic equation for the reaction of each of the following aqueous solutions with...
Problem 4QAP: Write a balanced net ionic equation for the reaction between the following aqueous solutions and OH-...
Problem 5QAP: Calculate K for the reactions in Question 1.
Problem 6QAP: Calculate K for the reactions in Question 2.
Problem 7QAP
Problem 8QAP: Calculate K for the reactions in Question 4.
Problem 9QAP: Calculate [H+] and pH in a solution in which lactic acid, HC3H5O3, is 0.250 M and the lactate ion,...
Problem 10QAP: Calculate [OH-] and pH in a solution in which the hydrogen sulfite ion, HSO3-, is 0.429 M and the...
Problem 11QAP: A buffer is prepared by dissolving 0.0250 mol of sodium nitrite, NaNO2, in 250.0 mL of 0.0410 M...
Problem 12QAP: A buffer is prepared by dissolving 0.062 mol of sodium fluoride in 127 mL of 0.0399 M hydrofluoric...
Problem 13QAP: A buffer solution is prepared by adding 15.00 g of sodium acetate (NaC2H3O2) and 12.50 g of acetic...
Problem 14QAP: A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to...
Problem 15QAP: A solution with a pH of 9.22 is prepared by adding water to 0.413 mol of KX to make 2.00 L of...
Problem 16QAP: An aqueous solution of 0.057 M weak acid, HX, has a pH of 4.65. What is the pH of the solution if...
Problem 17QAP: Which of the following would form a buffer if added to 250.0 mL of 0.150 M SnF2? (a) 0.100 mol of...
Problem 18QAP: Which of the following would form a buffer if added to 295 mL of 0.380 M HCl? (a) 0.100 mol of...
Problem 19QAP: Calculate the pH of a solution prepared by mixing 2.50 g of hypobromous acid (HOBr) and 0.750 g of...
Problem 20QAP: Calculate the pH of a solution prepared by mixing 20.00 mL of aniline, C6H5NH2(d=1.022g/mL), with...
Problem 21QAP: Calculate the pH of a solution prepared by mixing 49.0 mL of butyric acid, HC4H7O2, with 6.15 g of...
Problem 22QAP: Calculate the pH of a solution prepared by mixing 100.0 mL of 1.20 M ethanolamine, C2H5ONH2, with...
Problem 23QAP: Consider the weak acids in Table 13.2. Which acid-base pair would be best for a buffer at a pH of...
Problem 24QAP
Problem 25QAP: A sodium hydrogen carbonate-sodium carbonate buffer is to be prepared with a pH of 9.40. (a) What...
Problem 26QAP: You want to make a buffer with a pH of 10.00 from NH4+/NH3. (a) What must the [ NH4+ ]/[ NH3 ]ratio...
Problem 27QAP
Problem 28QAP: The buffer capacity indicates how much OH- or H+ ions a buffer can react with. What is the buffer...
Problem 29QAP: A buffer is made up of 0.300 L each of 0.500 M KH2PO4 and 0.317 M K2HPO4. Assuming that volumes are...
Problem 30QAP: A buffer is made up of 239 mL of 0.187 M potassium hydrogen tartrate (KHC4H4O6) and 137 mL of 0.288...
Problem 31QAP: Enough water is added to the buffer in Question 29 to make the total volume 10.0 L. Calculate (a)...
Problem 32QAP: Enough water is added to the buffer in Question 30 to make the total volume 5.00 L. (a) Calculate...
Problem 33QAP: A buffer is prepared in which the ratio [ H2PO4 ]/[ HPO42 ]is 3.0. (a) What is the pH of this...
Problem 34QAP: A buffer is prepared using the butyric acid/butyrate (HC4H7O2/C4H7O2)acid-base pair. The ratio of...
Problem 35QAP: Blood is buffered mainly by the HCO3 H2CO3 buffer system. The normal pH of blood is 7.40. (a)...
Problem 36QAP: There is a buffer system in blood H2PO4 HPO42 that helps keep the blood pH at 7.40. (K aH2PO4...
Problem 37QAP: Given three acid-base indicators—methyl orange (end point at pH 4), bromthymol blue (end point at...
Problem 38QAP: Given the acid-base indicators in Question 37, select a suitable indicator for the following...
Problem 39QAP: Metacresol purple is an indicator that changes from yellow to purple at pH 8.2. (a) What is Ka for...
Problem 40QAP: Thymolphthalein is an indicator that changes from colorless to blue at pH 9.5. (a) What is its Ka?...
Problem 41QAP: When 25.00 mL of HNO3 are titrated with Sr(OH)2, 58.4 mL of a 0.218 M solution are required. (a)...
Problem 42QAP: A solution of KOH has a pH of 13.29. It requires 27.66 mL of 0.2500 M HCI to reach the equivalence...
Problem 43QAP: A solution consisting of 25.00 g NH4Cl in 178 mL of water is titrated with 0.114 M KOH. (a) How many...
Problem 44QAP: A 50.0-mL sample of NaHSO3 is titrated with 22.94 mL of 0.238 M KOH. (a) Write a balanced net ionic...
Problem 45QAP: A sample of 0.220 M triethylamine, (CH3CH2)3 N, is titrated with 0.544 M HCl. (K b...
Problem 46QAP: A 35.00-mL sample of 0.487 M KBrO is titrated with 0.264 M HNO3. (K b BrO =4.0106)(a) Write a...
Problem 47QAP: A 0.4000 M solution of nitric acid is used to titrate 50.00 mL of 0.237 M barium hydroxide. (Assume...
Problem 48QAP: A 0.2481 M solution of KOH is used to titrate 30.00 mL of 0.269 M hydrobromic acid. Assume that...
Problem 49QAP: Consider the titration of butyric acid (HBut) with sodium hydroxide. In an experiment, 50.00 mL of...
Problem 50QAP: Morphine, C17H19O3N, is a weak base (K b =7.4107). Consider its titration with hydrochloric acid. In...
Problem 51QAP: Consider a 10.0% (by mass) solution of hypochlorous acid. Assume the density of the solution to be...
Problem 52QAP: A solution is prepared by dissolving 0.350 g of benzoic acid, HC7H5O2, in water to make 100.0 mL of...
Problem 53QAP
Problem 54QAP: Ammonia gas is bubbled into 275 mL of water to make an aqueous solution of ammonia. To prepare a...
Problem 55QAP: For an aqueous solution of acetic acid to be called distilled white vinegar it must contain 5.0%...
Problem 56QAP
Problem 57QAP
Problem 58QAP: Water is accidentally added to 350.00 mL of a stock solution of 6.00 M HCI. A 75.00-mL sample of the...
Problem 59QAP: A solution of an unknown weak base (nonelectrolyte) at 25C has an osmotic pressure of 1.287 atm and...
Problem 60QAP: Consider an aqueous solution of HF. The molar heat of formation for aqueous HF is -320.1 kJ/mol. (a)...
Problem 61QAP: Each symbol in the box below represents a mole of a component in one liter of a buffer solution;...
Problem 62QAP: Use the same symbols as in Question 61 ( = anion, =OH) for the box below. (a) Fill in a similar box...
Problem 63QAP: The following is the titration curve for the titration of 50.00 of a 0.100 M acid with 0.100 M KOH....
Problem 64QAP
Problem 65QAP: Follow the directions of Question 64. Consider two beakers: Beaker A has a weak acid(K a=1105)....
Problem 66QAP
Problem 67QAP: Indicate whether each of the following statements is true or false. If the statement is false,...
Problem 68QAP
Problem 69QAP: Consider the following titration curves. The solution in the buret is 0.1 M. The solution in the...
Problem 70QAP: Consider the titration of HF (K a=6.7104) with NaOH. What is the pH when a third of the acid has...
Problem 71QAP: The species called glacial acetic acid is 98% acetic acid by mass (d=1.0542g/mL). What volume of...
Problem 72QAP: Four grams of a monoprotic weak acid are dissolved in water to make 250.0 mL of solution with a pH...
Problem 73QAP
Problem 74QAP: Fifty cm3 of 1.000 M nitrous acid is titrated with 0.850 M NaOH. What is the pH of the solution (a)...
Problem 75QAP: A diprotic acid, H2B(MM=126g/moL), is determined to be a hydrate, H2B xH2O. A 10.00-g sample of this...
Problem 76QAP
Problem 77QAP: Two students were asked to determine the Kb of an unknown base. They were given a bottle with a...
Problem 78QAP: How many grams of NaOH must be added to 1.00 L of a buffer made from 0.150 M NH3 and 10.0 g of NH4Cl...
Problem 79QAP: How many grams of NaF must be added to 70.00 mL of 0.150 M HNO3 to obtain a buffer with a pH of...
Problem 80QAP
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What is the molarity of a solution made by dissolving 1.250 grams of NazCo3 in H20 to make 100.0 mL of solution?
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