Chemistry: Structures and Properties, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package
1st Edition
ISBN: 9780321974617
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 10, Problem 1E
What is thermochemistry? Why is it important?
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Draw the structure of the pound in the provided
CO
as a 300-1200
37(2), 11 ( 110, and 2.5 (20
Please help me with # 4 and 5. Thanks in advance!
A small artisanal cheesemaker is testing the acidity of their milk
before it coagulates. During fermentation, bacteria produce lactic
acid (K₁ = 1.4 x 104), a weak acid that helps to curdle the milk and
develop flavor. The cheesemaker has measured that the developing
mixture contains lactic acid at an initial concentration of 0.025 M.
Your task is to calculate the pH of this mixture and determine whether
it meets the required acidity for proper cheese development. To
achieve the best flavor, texture and reduce/control microbial growth,
the pH range needs to be between pH 4.6 and 5.0.
Assumptions:
Lactic acid is a monoprotic acid
H
H
:0:0:
H-C-C
H
:0:
O-H
Figure 1: Lewis Structure for Lactic Acid
For simplicity, you can use the generic formula HA to represent the acid
You can assume lactic acid dissociation is in water as milk is mostly water.
Temperature is 25°C
1. Write the K, expression for the dissociation of lactic acid in the space provided. Do not forget to
include state symbols.…
Chapter 10 Solutions
Chemistry: Structures and Properties, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package
Ch. 10 - A chemical system produces 155 kJ of heat and does...Ch. 10 - Which sample is most likely to undergo the...Ch. 10 - Prob. 3SAQCh. 10 - A 12.5-g sample of granite initially at 82.0 C is...Ch. 10 - A cylinder with a moving piston expands from an...Ch. 10 - When a 3.80-g sample of liquid octane (C8H18)...Ch. 10 - Hydrogen gas reacts with oxygen to form water....Ch. 10 - Manganese reacts with hydrochloric acid to produce...Ch. 10 - Consider the reactions: A2BH1A3CH2 What is H for...Ch. 10 - Use standard enthalpies of formation to determine...
Ch. 10 - Prob. 11SAQCh. 10 - Prob. 12SAQCh. 10 - Prob. 13SAQCh. 10 - Which set of compounds is arranged in order of...Ch. 10 - Prob. 15SAQCh. 10 - What is thermochemistry? Why is it important?Ch. 10 - What is energy? What is work? List some examples...Ch. 10 - Prob. 3ECh. 10 - What is the law of conservation of energy? How...Ch. 10 - A friend claims to have constructed a machine that...Ch. 10 - What is a state function? List some examples of...Ch. 10 - What is internal energy? Is internal energy a...Ch. 10 - If energy flows out of a chemical system and into...Ch. 10 - If the internal energy of the products of a...Ch. 10 - What is heat? Explain the difference between heat...Ch. 10 - How is the change in internal energy of a system...Ch. 10 - Explain how the sum of heat and work can be a...Ch. 10 - What is heat capacity? Explain the difference...Ch. 10 - Explain how the high specific heat capacity of...Ch. 10 - If two objects, A and B, of different temperature...Ch. 10 - What is pressure-volume work? How is it...Ch. 10 - What is calorimetry? Explain the difference...Ch. 10 - What is the change in enthalpy ( H) for a...Ch. 10 - Explain the difference between an exothermic and...Ch. 10 - From a molecular viewpoint where does the energy...Ch. 10 - From a molecular viewpoint, where does the energy...Ch. 10 - Is the change in enthalpy for a reaction an...Ch. 10 - Explain how the value of H for a reaction changes...Ch. 10 - What is Hess's law? Why is it useful?Ch. 10 - What is a standard state? What is the standard...Ch. 10 - How can bond energies be used to estimate H for a...Ch. 10 - Explain the difference between exothermic and...Ch. 10 - What is the standard enthalpy of formation for a...Ch. 10 - How do you calculate Hrxn from tabulated standard...Ch. 10 - What is lattice energy? How does lattice energy...Ch. 10 - Which statement is true of the internal energy of...Ch. 10 - During an energy exchange, a chemical system...Ch. 10 - Identify each energy exchange as primarily heat or...Ch. 10 - Identify each energy exchange as primarily heat or...Ch. 10 - A system releases 622 kJ of heat and does 105 kJ...Ch. 10 - A system absorbs 196 kJ of heat, and the...Ch. 10 - The gas in a piston (defined as the system) warms...Ch. 10 - The air in an inflated balloon (defined as the...Ch. 10 - A person packs two identical coolers for a picnic,...Ch. 10 - A kilogram of aluminum metal and a kilogram of...Ch. 10 - How much heat is required to warm 1.50 L of water...Ch. 10 - How much heat is required to warm 1.50 kg of sand...Ch. 10 - Suppose that 25 g of each substance is initially...Ch. 10 - An unknown mass of each substance, initially at...Ch. 10 - How much work (in J) is required to expand the...Ch. 10 - The average human lung expands by about 0.50 L...Ch. 10 - The air within a piston equipped with a cylinder...Ch. 10 - A gas is compressed from an initial volume of 5.55...Ch. 10 - When 1 mol of a fuel burns at constant pressure,...Ch. 10 - The change in internal energy for the combustion...Ch. 10 - Is each process exothermic or endothermic?...Ch. 10 - Is each process exothermic or endothermic?...Ch. 10 - Consider the thermochemical equation for the...Ch. 10 - What mass of natural gas (CH4) must bum to emit...Ch. 10 - Nitromethane (CH3NO2) burns in air to produce...Ch. 10 - Titanium reacts with iodine to form titanium (III)...Ch. 10 - The propane fuel (C3H8) used in gas barbeques bums...Ch. 10 - Charcoal is primarily carbon. Determine the mass...Ch. 10 - We submerge a silver block, initially at 58.5 °C...Ch. 10 - We submerge a 32.5-g iron rod, initially at 22.7...Ch. 10 - We submerge a 31.1-g wafer of pure gold initially...Ch. 10 - We submerge a 2.85-g lead weight, initially at...Ch. 10 - Two substances, A and B, initially at different...Ch. 10 - A 2.74-g sample of a substance suspected of being...Ch. 10 - Exactly 1.5 g of a fuel burns under conditions of...Ch. 10 - In order to obtain the largest possible amount of...Ch. 10 - When 0.514 g of biphenyl (C12H10) undergoes...Ch. 10 - Mothballs are composed primarily of the...Ch. 10 - Zinc metal reacts with hydrochloric acid according...Ch. 10 - Instant cold packs used to ice athletic injuries...Ch. 10 - For each generic reaction, determine the value of...Ch. 10 - Consider the generic reaction: A+2BC+3DH=155kJ...Ch. 10 - Calculate Hrxn for the reaction:...Ch. 10 - Calculate Hrxn for the reaction:...Ch. 10 - Calculate Hrxn for the reaction:...Ch. 10 - Calculate Hrxn for the reaction:...Ch. 10 - Hydrogenation reactions are used to add hydrogen...Ch. 10 - Ethanol is a possible fuel. Use average bond...Ch. 10 - Hydrogen, a potential future fuel, can be produced...Ch. 10 - Hydroxyl radicals react with and eliminate many...Ch. 10 - Write an equation for the formation of each...Ch. 10 - Prob. 82ECh. 10 - S3. Hydrazine (N2H4) is a fuel used by some...Ch. 10 - Prob. 84ECh. 10 - Prob. 85ECh. 10 - Prob. 86ECh. 10 - Prob. 87ECh. 10 - Prob. 88ECh. 10 - Top fuel dragsters and funny cars burn...Ch. 10 - Prob. 90ECh. 10 - Prob. 91ECh. 10 - Rubidium iodide has a lattice energy of-617...Ch. 10 - Prob. 93ECh. 10 - Prob. 94ECh. 10 - Use the Born-Haber cycle and data from Appendix...Ch. 10 - Prob. 96ECh. 10 - The kinetic energy of a rolling billiard ball is...Ch. 10 - A100-W light bulb is placed in a cylinder equipped...Ch. 10 - Evaporating sweat cools the body because...Ch. 10 - LP gas burns according to the exothermic reaction:...Ch. 10 - Use standard enthalpies of formation to calculate...Ch. 10 - Dry ice is solid carbon dioxide. Instead of...Ch. 10 - A 25.5-g aluminum block is warmed to 65.4 °C and...Ch. 10 - We mix 50.0 mL of ethanol (density = 0.789 g/mL)...Ch. 10 - Prob. 105ECh. 10 - Prob. 106ECh. 10 - One tablespoon of peanut butter has a mass of 16...Ch. 10 - Prob. 108ECh. 10 - Prob. 109ECh. 10 - When we burn 10.00 g of phosphorus in O2 (g) to...Ch. 10 - The H for the oxidation of S in the gas phase to...Ch. 10 - The Hfo of TiI3(s) is -328 kJ/mol; and the Ho for...Ch. 10 - A copper cube measuring 1.55 cm on edge and an...Ch. 10 - A pure gold ring and pure silver ring have a total...Ch. 10 - The reaction of Fe2O3(s) with Al(s) to form...Ch. 10 - Prob. 116ECh. 10 - Prob. 117ECh. 10 - Prob. 118ECh. 10 - Prob. 119ECh. 10 - Calculate the heat of atomization (see previous...Ch. 10 - Prob. 121ECh. 10 - Prob. 122ECh. 10 - Prob. 123ECh. 10 - Prob. 124ECh. 10 - Prob. 125ECh. 10 - Find H, E, q, and w for the freezing of water at...Ch. 10 - The heat of vaporization of water at 373 K is 40.7...Ch. 10 - Prob. 128ECh. 10 - Prob. 129ECh. 10 - Prob. 130ECh. 10 - Prob. 131ECh. 10 - Prob. 132ECh. 10 - Prob. 133ECh. 10 - Which expression describes the heat emitted in a...Ch. 10 - Prob. 135ECh. 10 - Prob. 136ECh. 10 - Prob. 137ECh. 10 - Prob. 138ECh. 10 - Prob. 139ECh. 10 - Which statement is true of a reaction in which V...Ch. 10 - Which statement is true of an endothermic...Ch. 10 - When a firecracker explodes, energy is obviously...
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- Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. :0: :0 H. 0:0 :0: :6: S: :0: Select to Edit Arrows ::0 Select to Edit Arrows H :0: H :CI: Rotation Select to Edit Arrows H. < :0: :0: :0: S:arrow_forward3:48 PM Fri Apr 4 K Problem 4 of 10 Submit Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s). Be sure to account for all bond-breaking and bond-making steps. Mg. :0: Select to Add Arrows :0: :Br: Mg :0: :0: Select to Add Arrows Mg. Br: :0: 0:0- Br -190 H 0:0 Select to Add Arrows Select to Add Arrows neutralizing workup H CH3arrow_forwardIarrow_forward
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