(a) Interpretation: The decreasing order of the acid strength should be determined. Concept introduction: The weak acid does not dissociate completely in a chemical reaction thus, the ionization equation is in equilibrium. For a general reaction of ionization of weak acid as follows: HA ⇌ H + + A − The expression for dissociation constant of the reaction is as follows: K a = [ H + ] [ A − ] [ HA ] The p K a of a weak acid is defined as negative log of K a or, p K = − log K a
(a) Interpretation: The decreasing order of the acid strength should be determined. Concept introduction: The weak acid does not dissociate completely in a chemical reaction thus, the ionization equation is in equilibrium. For a general reaction of ionization of weak acid as follows: HA ⇌ H + + A − The expression for dissociation constant of the reaction is as follows: K a = [ H + ] [ A − ] [ HA ] The p K a of a weak acid is defined as negative log of K a or, p K = − log K a
Definition Definition Transformation of a chemical species into another chemical species. A chemical reaction consists of breaking existing bonds and forming new ones by changing the position of electrons. These reactions are best explained using a chemical equation.
Chapter 13, Problem 37QAP
Interpretation Introduction
(a)
Interpretation:
The decreasing order of the acid strength should be determined.
Concept introduction:
The weak acid does not dissociate completely in a chemical reaction thus, the ionization equation is in equilibrium.
For a general reaction of ionization of weak acid as follows:
HA⇌H++A−
The expression for dissociation constant of the reaction is as follows:
Ka=[H+][A−][HA]
The pKa of a weak acid is defined as negative log of Ka or,
pK=−logKa
Interpretation Introduction
(b)
Interpretation:
The acid with the largest Ka value should be determined.
Concept introduction:
The weak acid does not dissociate completely in a chemical reaction thus, the ionization equation is in equilibrium.
For a general reaction of ionization of weak acid as follows:
HA⇌H++A−
The expression for dissociation constant of the reaction is as follows:
Ka=[H+][A−][HA]
The pKa of a weak acid is defined as negative log of Ka or,
A covalent bond is the result of the
a)
b)
c)
d)
e)
overlap of two half-filled s orbitals
overlap of a half-filled s orbital and a half-filled p orbital
overlap of two half-filled p orbitals along their axes
parallel overlap of two half-filled parallel p orbitals
all of the above
Can the target compound at right be efficiently synthesized in good yield from the unsubstituted benzene at left?
starting
material
target
If so, draw a synthesis below. If no synthesis using reagents ALEKS recognizes is possible, check the box under the drawing area.
Be sure you follow the standard ALEKS rules for submitting syntheses.
+ More...
Note for advanced students: you may assume that you are using a large excess of benzene as your starting material.
C
T
Add/Remove step
X
но
Which one of the following atoms should have the largest electron affinity?
a)
b)
c)
d)
으으
e)
1s² 2s² 2p6 3s¹
1s² 2s² 2p5
1s² 2s² 2p 3s² 3p²
1s² 2s 2p 3s² 3p6 4s2 3ds
1s² 2s² 2p6
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