. In each of the following chemical equations, identify the conjugate acid-base pairs. a. NH 3 ( aq ) + H 2 O ( l ) ⇌ NH 4 + ( aq ) + OH − ( aq ) b. PO 4 3 − ( aq ) + H 2 O ( 1 ) ⇌ HPO 4 2 − ( aq ) + OH − ( aq ) c. C 2 H 3 O 2 − ( aq ) + H 2 O ( l ) ⇌ HC 2 H 3 O 2 ( aq ) + OH − ( aq )
. In each of the following chemical equations, identify the conjugate acid-base pairs. a. NH 3 ( aq ) + H 2 O ( l ) ⇌ NH 4 + ( aq ) + OH − ( aq ) b. PO 4 3 − ( aq ) + H 2 O ( 1 ) ⇌ HPO 4 2 − ( aq ) + OH − ( aq ) c. C 2 H 3 O 2 − ( aq ) + H 2 O ( l ) ⇌ HC 2 H 3 O 2 ( aq ) + OH − ( aq )
Solution Summary: The author explains that the conjugate acid-base pairs should be identified in the given chemical equation.
Substance X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of X
have been determined:
melting point
enthalpy of fusion
90. °C
8.00 kJ/mol
boiling point
130. °C
enthalpy of
vaporization
44.00 kJ/mol
density
2.80 g/cm³ (solid)
36. J.K mol (solid)
2.50 g/mL (liquid)
heat capacity
32. J.Kmol (liquid)
48. J.Kmol (vapor)
You may also assume X behaves as an ideal gas in the vapor phase.
Ex
Suppose a small sample of X at 50 °C is put into an evacuated flask and heated at a constant rate until 15.0 kJ/mol of heat has been added to the sample.
Graph the temperature of the sample that would be observed during this experiment.
o0o
150-
140
130-
120-
110-
100-
G
Ar
?
Mechanism. Provide the mechanism for the reaction below. You must include all arrows, intermediates, and formal
charges. If drawing a Sigma complex, draw all major resonance forms. The ChemDraw template of this document is
available on Carmen.
Br
FeBr3
Br
Check the box under each compound that exists as a pair of mirror-image twins. If none of them do, check the none of the above box under the table.
CH3
OH
CH3
CH2
-CH-CH3
CH3
OH
OH
CH-CH2-CH-
-CH3
CH3
CH3
OH
OH
CH3
C
-CH2- C. -CH3
CH3- -CH2- -CH-CH2-OH
OH
CH3
none of the above
ك
Chapter 16 Solutions
Student Solutions Manual for Zumdahl/DeCoste's Introductory Chemistry: A Foundation, 9th
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