Chemistry
13th Edition
ISBN: 9781260162370
Author: Chang
Publisher: MCG
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Chapter 22, Problem 22.52QP
From the data in Appendix 2, calculate ΔH° for the synthesis of NO (which is the first step in the manufacture of nitric acid) at 25°C:
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Calculating the pH at equivalence of a titration
A chemist titrates 210.0 mL of a 0.1003 M hydrobromic acid (HBr) solution with 0.7550M KOH solution at 25 °C. Calculate the pH at equivalence.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH = ]
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18
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Do you do chemistry assignments
Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
This reaction is always spontaneous, but
proceeds slower at temperatures above
120. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
(pick one)
B
This reaction is spontaneous except above
117. °C.
AS is
(pick one)
ΔΗ is
(pick one)
This reaction is slower below 20. °C than
C
above.
AS is
|(pick one)
?
18
Ar
1
Chapter 22 Solutions
Chemistry
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Ch. 22 - Elements number 17 and 20 form compounds with...Ch. 22 - Give an example of hydrogen as (a) an oxidizing...Ch. 22 - Prob. 22.13QPCh. 22 - Prob. 22.14QPCh. 22 - Prob. 22.15QPCh. 22 - Prob. 22.16QPCh. 22 - Prob. 22.17QPCh. 22 - Starting with H2, describe how you would prepare...Ch. 22 - Give an example of a carbide and a cyanide.Ch. 22 - How are cyanide ions used in metallurgy?Ch. 22 - Briefly discuss the preparation and properties of...Ch. 22 - Prob. 22.22QPCh. 22 - Prob. 22.23QPCh. 22 - Describe two chemical differences between CO and...Ch. 22 - Describe the reaction between CO2 and OH in terms...Ch. 22 - Prob. 22.26QPCh. 22 - Prob. 22.27QPCh. 22 - Prob. 22.28QPCh. 22 - Prob. 22.29QPCh. 22 - Magnesium chloride is dissolved in a solution...Ch. 22 - Prob. 22.31QPCh. 22 - Prob. 22.32QPCh. 22 - A piece of red-hot magnesium ribbon will continue...Ch. 22 - Prob. 22.34QPCh. 22 - Describe a laboratory and an industrial...Ch. 22 - Prob. 22.36QPCh. 22 - Prob. 22.37QPCh. 22 - Prob. 22.38QPCh. 22 - Prob. 22.39QPCh. 22 - Prob. 22.40QPCh. 22 - Prob. 22.41QPCh. 22 - Write a balanced equation for the formation of...Ch. 22 - Prob. 22.43QPCh. 22 - At 620 K the vapor density of ammonium chloride...Ch. 22 - Prob. 22.45QPCh. 22 - Prob. 22.46QPCh. 22 - Write a balanced equation for each of the...Ch. 22 - Prob. 22.48QPCh. 22 - Prob. 22.49QPCh. 22 - Predict the geometry of nitrous oxide, N2O, by the...Ch. 22 - Consider the reaction N2(g)+O2(g)2NO(g) Given that...Ch. 22 - From the data in Appendix 2, calculate H for the...Ch. 22 - Prob. 22.53QPCh. 22 - Prob. 22.54QPCh. 22 - Prob. 22.55QPCh. 22 - Prob. 22.56QPCh. 22 - Prob. 22.57QPCh. 22 - Prob. 22.58QPCh. 22 - Describe one industrial and one laboratory...Ch. 22 - Prob. 22.60QPCh. 22 - Prob. 22.61QPCh. 22 - Prob. 22.62QPCh. 22 - Describe the contact process for the production of...Ch. 22 - Prob. 22.64QPCh. 22 - Prob. 22.65QPCh. 22 - One of the steps involved in the depletion of...Ch. 22 - Hydrogen peroxide is unstable and decomposes...Ch. 22 - What are the oxidation numbers of O and F in HFO?Ch. 22 - Prob. 22.69QPCh. 22 - In 2008, about 48 million tons of sulfuric acid...Ch. 22 - Prob. 22.71QPCh. 22 - Prob. 22.72QPCh. 22 - Prob. 22.73QPCh. 22 - Prob. 22.74QPCh. 22 - Prob. 22.75QPCh. 22 - Prob. 22.76QPCh. 22 - Describe two reactions in which sulfuric acid acts...Ch. 22 - Prob. 22.78QPCh. 22 - Prob. 22.79QPCh. 22 - Prob. 22.80QPCh. 22 - Prob. 22.81QPCh. 22 - Prob. 22.82QPCh. 22 - Prob. 22.83QPCh. 22 - Prob. 22.84QPCh. 22 - Prob. 22.85QPCh. 22 - Hydrogen fluoride can be prepared by the action of...Ch. 22 - Prob. 22.87QPCh. 22 - Prob. 22.88QPCh. 22 - Use the VSEPR method to predict the geometries of...Ch. 22 - Iodine pentoxide, I2O5, is sometimes used to...Ch. 22 - Prob. 22.91QPCh. 22 - Prob. 22.92QPCh. 22 - Prob. 22.93QPCh. 22 - What is the change in oxidation number for the...Ch. 22 - Prob. 22.95QPCh. 22 - Prob. 22.96QPCh. 22 - Prob. 22.97QPCh. 22 - Consider the Frasch process. (a) How is it...Ch. 22 - Predict the physical and chemical properties of...Ch. 22 - Prob. 22.100QPCh. 22 - Prob. 22.101QPCh. 22 - Life evolves to adapt to its environment. In this...Ch. 22 - Prob. 22.103QPCh. 22 - As we saw in Section 21.2, the reduction of iron...Ch. 22 - Assuming ideal behavior, calculate the density of...Ch. 22 - A 10.0-g sample of white phosphorus was burned in...
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- Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure Yes. Is the proposed Lewis structure reasonable? Cl- : 2: :Z: :Z: N—N : 0: C C1: O CO No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* ☐ Yes. No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0". ☑arrow_forwardUse the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions ΔΗ is (pick one) A This reaction is faster above 103. °C than below. AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous only above -9. °C. AS is (pick one) ΔΗ is (pick one) C The reverse of this reaction is always spontaneous. AS is (pick one) 18 Ararrow_forwardUse the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A The reverse of this reaction is always spontaneous but proceeds slower at temperatures below 41. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 94. °C. AS is (pick one) This reaction is always spontaneous, but ΔΗ is (pick one) C proceeds slower at temperatures below −14. °C. AS is (pick one) Х 00. 18 Ar 무ㅎ B 1 1arrow_forward
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