PREPARING F/YOUR ACS EXAM IN GEN CHEM
18th Edition
ISBN: 9781732776401
Author: EUBANKS
Publisher: American Chemical Society
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Question
Chapter ST, Problem 17PQ
Interpretation Introduction
Interpretation:
Molecules of oxygen gas that will be produced from
Concept Introduction:
Mole is S.I. unit. The number of moles is calculated as ratio of mass of compound to molar mass of compound.
Molar mass is sum of the total mass in grams of all atoms that make up mole of particular molecule that is mass of 1 mole of compound. The S.I unit is
The expression to relate number of moles, mass and molar mass of compound is as follows:
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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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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
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1
Chapter ST Solutions
PREPARING F/YOUR ACS EXAM IN GEN CHEM
Ch. ST - Prob. 1PQCh. ST - Prob. 2PQCh. ST - Prob. 3PQCh. ST - Prob. 4PQCh. ST - Prob. 5PQCh. ST - Prob. 6PQCh. ST - Prob. 7PQCh. ST - Prob. 8PQCh. ST - Prob. 9PQCh. ST - Prob. 10PQ
Ch. ST - Prob. 11PQCh. ST - Prob. 12PQCh. ST - Prob. 13PQCh. ST - Prob. 14PQCh. ST - Prob. 15PQCh. ST - Prob. 16PQCh. ST - Prob. 17PQCh. ST - Prob. 18PQCh. ST - Prob. 19PQCh. ST - Prob. 20PQCh. ST - Prob. 21PQCh. ST - Prob. 22PQCh. ST - Prob. 23PQCh. ST - Prob. 24PQCh. ST - Prob. 25PQCh. ST - Prob. 26PQCh. ST - Prob. 27PQCh. ST - Prob. 28PQCh. ST - Prob. 29PQCh. ST - Prob. 30PQ
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