Chemistry: Atoms First
18th Edition
ISBN: 9781938168154
Author: Richard Langley, Klaus Theopold, Paul Flowers
Publisher: OpenStax College
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Chapter 7, Problem 31E
Lithium hydroxide may be used to absorb carbon dioxide in enclosed environments, such as manned spacecraft and submarines. Write an equation for the reaction that involves 2 mol of LiOH per 1 mol of
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NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at
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ethyl acetate
H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm
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How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
Chapter 7 Solutions
Chemistry: Atoms First
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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- true or false, given that a 20.00 mL sample of NaOH took 24.15 mL of 0.141 M HCI to reach the endpoint in a titration, the concentration of the NaOH is 1.17 M.arrow_forwardin the bromothymol blue experiment, pKa was measured. A closely related compound has a Ka of 2.10 x 10-5. What is the pKa?a) 7.1b) 4.7c) 2.0arrow_forwardcalculate the equilibrium concentration of H2 given that K= 0.017 at a constant temperature for this reaction. The inital concentration of HBr is 0.050 M.2HBr(g) ↔ H2(g) + Br2(g)a) 4.48 x 10-2 M b) 5.17 x 10-3 Mc) 1.03 x 10-2 Md) 1.70 x 10-2 Marrow_forward
- true or falsegiven these two equilibria with their equilibrium constants:H2(g) + CI2(l) ↔ 2HCI(g) K= 0.006 CI2(l) ↔ CI2(g) K= 0.30The equilibrium contstant for the following reaction is 1.8H2(g) + CI2 ↔ 2HCI(g)arrow_forwardI2(g) + CI2(g) ↔ 2ICIK for this reaction is 81.9. Find the equilibrium concentration of I2 if the inital concentration of I2 and CI2 are 0.010 Marrow_forwardtrue or false,the equilibrium constant for this reaction is 0.50.PCI5(g) ↔ PCI3(g) + CI2(g)Based on the above, the equilibrium constant for the following reaction is 0.25.2PCI5(g) ↔. 2PCI3(g) + 2CI2(g)arrow_forward
- true or false, using the following equilibrium, if carbon dioxide is added the equilibrium will shift toward the productsC(s) + CO2(g) ↔ 2CO(g)arrow_forward2S2O2/3- (aq) + I2 (aq) ---> S4O2/6- (aq) +2I- (aq) Experiment I2 (M) S2O3- (M) Initital Rate (M/s) 1 0.01 0.01 0.0004 2 0.01 0.02 0.0004 3 0.02 0.01 0.0008 Calculate the overall order for this reaction using the table data a) 3b) 0c) 2d) 1arrow_forwardthe decomposition of N2O5 is the first order with a half-life of 1.98 minutes. If the inital concentration of N2O5 is 0.200 M, what is the concentration after 6 minutes?a) 0.612 Mb) 0.035 Mc) 0.024 Md) 0.100 Marrow_forward
- 20.00 mL of 0.150 M HCI is titrated with 0.075 M NaOH. What volume of NaOH is needed?a) 50 mLb) 20 mLc) 40 mLd) 26.66 mLarrow_forward20.00 mL of 0.150 M NaOH is titrated with 37.75 mL of HCI. What is the molarity of the HCI?a) 0.150 Mb) 0.079 Mc) 0.025 Md) 0.050 Marrow_forwardin the following reaction, the OH- acts as which of these?NO2- (aq) + H2O (l) ⇌ OH- (aq) + HNO2 (aq)a) not a weak acidb) basec) acidarrow_forward
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