Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 7, Problem 45E
Determine the number of moles and the mass requested for each reaction in Exercise 7.44.
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Using the Nernst equation to calculate nonstandard cell voltage
A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction:
MnO2 (s)+4H* (aq)+2Cr²+ (aq) → Mn²+ (aq)+2H₂O (1)+2Cr³+ (aq)
+
2+
2+
3+
Suppose the cell is prepared with 7.44 M H* and 0.485 M Cr²+ in one half-cell and 7.92 M Mn² and 3.73 M Cr³+ in the other.
Calculate the cell voltage under these conditions. Round your answer to 3 significant digits.
☐
x10
μ
Х
5
?
000
日。
Calculating standard reaction free energy from standard reduction...
Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free energy AG° for the following redox reaction.
Be sure your answer has the correct number of significant digits.
NO (g) +H₂O (1) + Cu²+ (aq) → HNO₂ (aq) +H* (aq)+Cu* (aq)
kJ
-
☐ x10
x10
olo
18
Ar
Calculating the pH of a weak base titrated with a strong acid
b
An analytical chemist is titrating 116.9 mL of a 0.7700M solution of aniline (C6H5NH2) with a 0.5300M solution of HNO3. The pK of aniline is 9.37.
Calculate the pH of the base solution after the chemist has added 184.2 mL of the HNO 3 solution to it.
Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO3 solution added.
Round your answer to 2 decimal places.
pH = ☐
☑
5
Chapter 7 Solutions
Chemistry Atoms First2e
Ch. 7 - What does it mean to say an equation is balanced?...Ch. 7 - Consider molecular, complete ionic, and net ionic...Ch. 7 - Balance the following equations: (a)...Ch. 7 - Balance the following equations: (a)...Ch. 7 - Write a balanced molecular equation describing...Ch. 7 - Write a balanced equation describing each of the...Ch. 7 - Colorful fireworks often involve the decomposition...Ch. 7 - Fill in the blank with a single chemical formula...Ch. 7 - Aqueous hydrogen fluoride (hydrofluoric acid) is...Ch. 7 - A novel process for obtaining magnesium from sea...
Ch. 7 - From the balanced molecular equations, write the...Ch. 7 - Use the following equations to answer the next...Ch. 7 - Indicate what type, or types, of reaction each of...Ch. 7 - Indicate what type, or types, of reaction each of...Ch. 7 - Silver can be separated from gold because silver...Ch. 7 - Determine the oxidation states of the elements in...Ch. 7 - Determine the oxidation states of the elements in...Ch. 7 - Determine the oxidation states of the elements in...Ch. 7 - Classify the following as acid-base reactions or...Ch. 7 - Identify the atoms that are oxidized and reduced,...Ch. 7 - Complete and balance the following acid-base...Ch. 7 - Complete and balance the following acid-base...Ch. 7 - Complete and balance the following...Ch. 7 - Complete and balance the following...Ch. 7 - Complete and balance the equations for the...Ch. 7 - When heated to 700—800 C, diamonds, which are pure...Ch. 7 - The military has experimented with lasers that...Ch. 7 - Write the molecular, total ionic, and net ionic...Ch. 7 - Great Lakes Chemical Company produces bromine,...Ch. 7 - In a common experiment in the general chemistry...Ch. 7 - Lithium hydroxide may be used to absorb carbon...Ch. 7 - Calcium propionate is sometimes added to bread to...Ch. 7 - Complete and balance the equations of the...Ch. 7 - Copper(II) sulfide is oxidized by molecular oxygen...Ch. 7 - Write balanced chemical equations for the...Ch. 7 - Calcium cyclamate Ca(C6H 11 NHSO3)2 is an...Ch. 7 - Complete and balance each of the following...Ch. 7 - Complete and balance each of the following...Ch. 7 - Balance each of the following equations according...Ch. 7 - Balance each of the following equations according...Ch. 7 - Balance each of the following equations according...Ch. 7 - Write the balanced equation, then outline the...Ch. 7 - Determine the number of moles and the mass...Ch. 7 - Write the balanced equation, then outline the...Ch. 7 - Determine the number of moles and the mass...Ch. 7 - H2 is produced by the reaction of 118.5 mL of a...Ch. 7 - Gallium chloride is formed by the reaction of 2.6...Ch. 7 - I2 is produced by the reaction of 0.4235 mol of...Ch. 7 - Silver is often extracted from ores such as...Ch. 7 - What mass of silver oxide, Ag2O, is required to...Ch. 7 - Carborundum is silicon carbide, SiC, a very hard...Ch. 7 - Automotive air bags inflate when a sample of...Ch. 7 - Urea, CO( NH2)2, is manufactured on a large scale...Ch. 7 - In an accident, a solution containing 2.5 kg of...Ch. 7 - A compact car gets 37.5 miles per gallon on the...Ch. 7 - What volume of 0.750 M hydrochloric acid solution...Ch. 7 - What volume of a 0.2089 M Kl solution contains...Ch. 7 - A mordant is a substance that combines with a dye...Ch. 7 - The toxic pigment called white lead, Pb3(OH)2(...Ch. 7 - The following quantities are placed in a...Ch. 7 - What is the limiting reactant in a reaction that...Ch. 7 - Which of the postulates of Dalton’s atomic theory...Ch. 7 - A student isolated 25 g of a compound following a...Ch. 7 - A sample of 0.53 g of carbon dioxide was obtained...Ch. 7 - Freon-12, CCl2F2, is prepared from CCl4 by...Ch. 7 - Citric acid, C6H5CH3, a component of jams,...Ch. 7 - Toluene, C6H5CH3, is oxidized by air under...Ch. 7 - In a laboratory experiment, the reaction of 3.0...Ch. 7 - Outline the steps needed to solve the following...Ch. 7 - Outline the steps needed to determine the limiting...Ch. 7 - Outline the steps needed to determine the limiting...Ch. 7 - What is the limiting reactant when 1.50 g of...Ch. 7 - Uranium can be isolated from its ores by...Ch. 7 - How many molecules of C2H4Cl2 can be prepared from...Ch. 7 - How many molecules of the sweetener saccharin can...Ch. 7 - The phosphorus pentoxide used to produce...Ch. 7 - Would you agree to buy 1 trillion...Ch. 7 - What volume of 0.0105-M HBr solution is required...Ch. 7 - Titration of a 20.0-mL sample of acid rain...Ch. 7 - What is the concentration of NaCl in a solution if...Ch. 7 - In a common medical laboratory determination of...Ch. 7 - Potatoes can be peeled commercially by soaking...Ch. 7 - A sample of gallium bromide, GaBr3, weighing 0....Ch. 7 - The principal component of mothballs is...Ch. 7 - A 0.025-g sample of a compound composed of boron...Ch. 7 - Sodium bicarbonate (baking soda), NaHCO3, can be...Ch. 7 - What volume of 0.600 M HCl is required to react...Ch. 7 - What volume of 0.08892 M HNO3 is required to react...Ch. 7 - What volume of a 0.3300-M solution of sodium...Ch. 7 - What volume of a 0.00945-M solution of potassium...Ch. 7 - A sample of solid calcium hydroxide, Ca(OH)2, is...Ch. 7 - What mass of Ca(OH)2 will react with 25.0 g of...Ch. 7 - How many milliliters of a 0.1500-M solution of KOH...Ch. 7 - Potassium acid phthalate, KNaC8H4O4, or KHP, is...Ch. 7 - The reaction of WCl6 with Al at ~400 C gives black...
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