Chemistry: Atoms First V1
1st Edition
ISBN: 9781259383120
Author: Burdge
Publisher: McGraw Hill Custom
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Chapter 8, Problem 8.26QP
Interpretation Introduction
Interpretation:
The number of moles of
Concept introduction:
- Mole ratios between the reactants of a reaction are depends upon the coefficients of respective reactant in a balanced chemical equation.
- Balanced chemical equation of a reaction is written according to law of conservation of mass.
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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
Calculating the pH at equivalence of a titration
Try Again
Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
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
=
11.43]
G
00.
18
Ar
B•
Chapter 8 Solutions
Chemistry: Atoms First V1
Ch. 8.1 - Write and balance the chemical equation for the...Ch. 8.1 - Write and balance the chemical equation that...Ch. 8.1 - Prob. 1PPBCh. 8.1 - Prob. 1PPCCh. 8.1 - Butyric acid (also known as butanoic acid,...Ch. 8.1 - Another compound found in milk fat that appears to...Ch. 8.1 - Prob. 2PPBCh. 8.1 - Prob. 2PPCCh. 8.1 - Prob. 8.3WECh. 8.1 - Prob. 3PPA
Ch. 8.1 - Using the chemical species A2, B, and AB, write a...Ch. 8.1 - Prob. 3PPCCh. 8.1 - Prob. 8.1.1SRCh. 8.1 - Prob. 8.1.2SRCh. 8.1 - Prob. 8.1.3SRCh. 8.1 - Prob. 8.1.4SRCh. 8.1 - Prob. 8.1.5SRCh. 8.2 - Combustion of a 5.50-g sample of benzene produces...Ch. 8.2 - The combustion of a 28.1-g sample of ascorbic acid...Ch. 8.2 - Prob. 4PPBCh. 8.2 - Prob. 4PPCCh. 8.2 - Prob. 8.2.1SRCh. 8.2 - Prob. 8.2.2SRCh. 8.2 - Prob. 8.2.3SRCh. 8.3 - Prob. 8.5WECh. 8.3 - Nitrogen and hydrogen react to form ammonia...Ch. 8.3 - Prob. 5PPBCh. 8.3 - Prob. 5PPCCh. 8.3 - Prob. 8.6WECh. 8.3 - Calculate the mass of water produced by the...Ch. 8.3 - Prob. 6PPBCh. 8.3 - The models here represent the reaction of nitrogen...Ch. 8.3 - Prob. 8.3.1SRCh. 8.3 - Prob. 8.3.2SRCh. 8.3 - Prob. 8.3.3SRCh. 8.3 - Prob. 8.3.4SRCh. 8.4 - Alka-Seltzer tablets contain aspirin, sodium...Ch. 8.4 - Ammonia is produced by the reaction of nitrogen...Ch. 8.4 - Prob. 7PPBCh. 8.4 - The diagrams show a reaction mixture before and...Ch. 8.4 - Aspirin, acetylsalicylic acid (C9H8O4), is the...Ch. 8.4 - Diethyl ether is produced from ethanol according...Ch. 8.4 - What mass of ether will be produced if 207 g of...Ch. 8.4 - The diagrams show a mixture of reactants and the...Ch. 8.4 - Prob. 8.4.1SRCh. 8.4 - Prob. 8.4.2SRCh. 8.4 - Prob. 8.4.3SRCh. 8.4 - Prob. 8.4.4SRCh. 8.4 - Prob. 8.4.5SRCh. 8 - Prob. 8.1QPCh. 8 - Prob. 8.2QPCh. 8 - Why must a chemical equation he balanced? What law...Ch. 8 - Write an unbalanced equation to represent each of...Ch. 8 - Prob. 8.5QPCh. 8 - Prob. 8.6QPCh. 8 - For each of the following unbalanced chemical...Ch. 8 - Prob. 8.8QPCh. 8 - Balance the following equations using the method...Ch. 8 - Which of the following equations best represents...Ch. 8 - Prob. 8.11QPCh. 8 - Determine whether each of the following equations...Ch. 8 - Prob. 8.13QPCh. 8 - Prob. 8.14QPCh. 8 - Prob. 8.15QPCh. 8 - Prob. 8.16QPCh. 8 - Prob. 8.17QPCh. 8 - Prob. 8.18QPCh. 8 - Prob. 8.19QPCh. 8 - Prob. 8.20QPCh. 8 - Prob. 8.21QPCh. 8 - Prob. 8.22QPCh. 8 - Prob. 8.23QPCh. 8 - On what law is stoichiometry based? Why is it...Ch. 8 - Prob. 8.25QPCh. 8 - Prob. 8.26QPCh. 8 - Prob. 8.27QPCh. 8 - Prob. 8.28QPCh. 8 - Prob. 8.29QPCh. 8 - Prob. 8.30QPCh. 8 - Prob. 8.31QPCh. 8 - Prob. 8.32QPCh. 8 - Prob. 8.33QPCh. 8 - When copper(II) sulfate pentahydrate (CuSO4 5H2O)...Ch. 8 - For many years, the extraction of gold from other...Ch. 8 - Prob. 8.36QPCh. 8 - Nitrous oxide (N2O) is also called laughing gas....Ch. 8 - Prob. 8.38QPCh. 8 - Prob. 8.39QPCh. 8 - Prob. 8.1VCCh. 8 - Prob. 8.2VCCh. 8 - Prob. 8.3VCCh. 8 - Prob. 8.4VCCh. 8 - Prob. 8.40QPCh. 8 - Prob. 8.41QPCh. 8 - Why is the theoretical yield of a reaction...Ch. 8 - Why is the actual yield of a reaction almost...Ch. 8 - Prob. 8.44QPCh. 8 - Prob. 8.45QPCh. 8 - Reactants A (red) and B (blue) combine in the...Ch. 8 - Prob. 8.47QPCh. 8 - Prob. 8.48QPCh. 8 - Prob. 8.49QPCh. 8 - Propane (C3H8) is a minor component of natural gas...Ch. 8 - Prob. 8.51QPCh. 8 - Prob. 8.52QPCh. 8 - Prob. 8.53QPCh. 8 - Prob. 8.54QPCh. 8 - Prob. 8.55QPCh. 8 - Prob. 8.56QPCh. 8 - Disulfur dichloride (S2Cl2) is used in the...Ch. 8 - Prob. 8.58QPCh. 8 - Prob. 8.59QPCh. 8 - Prob. 8.60QPCh. 8 - Prob. 8.61QPCh. 8 - Prob. 8.62QPCh. 8 - Prob. 8.63QPCh. 8 - Prob. 8.64QPCh. 8 - Prob. 8.65QPCh. 8 - Industrially, nitric acid is produced by the...Ch. 8 - Prob. 8.67QPCh. 8 - Prob. 8.68QPCh. 8 - Prob. 8.69QPCh. 8 - Prob. 8.70QPCh. 8 - Prob. 8.71QPCh. 8 - Prob. 8.72QPCh. 8 - Prob. 8.73QPCh. 8 - Prob. 8.74QPCh. 8 - Prob. 8.75QPCh. 8 - Prob. 8.76QPCh. 8 - Prob. 8.77QPCh. 8 - Prob. 8.78QPCh. 8 - Prob. 8.79QPCh. 8 - The combustion of a 5.50-g sample of oxalic acid...Ch. 8 - Prob. 8.81QPCh. 8 - Prob. 8.82QPCh. 8 - Prob. 8.83QPCh. 8 - Prob. 8.84QPCh. 8 - Prob. 8.85QPCh. 8 - Prob. 8.86QPCh. 8 - Potash is any potassium mineral that is used for...Ch. 8 - A 21.496-g sample of magnesium is burned in air to...Ch. 8 - Prob. 8.89QPCh. 8 - Prob. 8.90QPCh. 8 - Prob. 8.91QPCh. 8 - Prob. 8.92QPCh. 8 - Prob. 8.93QPCh. 8 - Prob. 8.94QPCh. 8 - Prob. 8.95QPCh. 8 - Prob. 8.96QPCh. 8 - Prob. 8.97QPCh. 8 - Prob. 8.98QPCh. 8 - A compound X contains 63.3 percent manganese (Mn)...Ch. 8 - Calculate the mass of water produced in the...Ch. 8 - Calcium phosphide (Ca3P2) and water react to form...Ch. 8 - Prob. 8.3KSPCh. 8 - Prob. 8.4KSP
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