(a) At 25 .0°C , K w for the autoionization of water is 1.01 × 10 − 14 , while at 100 .0°C it is 5.60 × 10 − 13 . What is Δ H ° for the autoionization of water? (b) For D 2 O , the values are 1.10 × 10 − 15 and 7.67 × 10 − 14 , respectively. What is the Δ H ° for the autoionization of D 2 O ?
(a) At 25 .0°C , K w for the autoionization of water is 1.01 × 10 − 14 , while at 100 .0°C it is 5.60 × 10 − 13 . What is Δ H ° for the autoionization of water? (b) For D 2 O , the values are 1.10 × 10 − 15 and 7.67 × 10 − 14 , respectively. What is the Δ H ° for the autoionization of D 2 O ?
Solution Summary: The author explains the value of Delta H° for the auto ionization of water.
(a) At
25
.0°C
,
K
w
for the autoionization of water is
1.01
×
10
−
14
, while at
100
.0°C
it is
5.60
×
10
−
13
. What is
Δ
H
°
for the autoionization of water? (b) For
D
2
O
, the values are
1.10
×
10
−
15
and
7.67
×
10
−
14
, respectively. What is the
Δ
H
°
for the autoionization of
D
2
O
?
Using the following two half-reactions, determine the pH range in which $NO_2^-\ (aq)$ cannot be found as the predominant chemical species in water.* $NO_3^-(aq)+10H^+(aq)+8e^-\rightarrow NH_4^+(aq)+3H_2O(l),\ pE^{\circ}=14.88$* $NO_2^-(aq)+8H^+(aq)+6e^-\rightarrow NH_4^+(aq)+2H_2O(l),\ pE^{\circ}=15.08$
Indicate characteristics of oxodec acid.
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