The nitrogen content of organic compounds can be determined by the Dumas method. The compound in question is first reacted by passage over hot CuO( s ): Compound → CuO( s ) Hot N 2 ( g ) + CO 2 ( g ) + H 2 O ( g ) The product gas is then passed through a concentrated solution of KOH to remove the CO 2 . After passage through the KOH solution, the gas contains N 2 and is saturated with water vapor. In a given experiment a 0.253-g sample of a compound produced 31.8 mL N 2 saturated with water vapor at 25°C and 726 torr. What is the mass percent of nitrogen in the compound? (The vapor pressure of water at 25°C is 23.8 torr.)
The nitrogen content of organic compounds can be determined by the Dumas method. The compound in question is first reacted by passage over hot CuO( s ): Compound → CuO( s ) Hot N 2 ( g ) + CO 2 ( g ) + H 2 O ( g ) The product gas is then passed through a concentrated solution of KOH to remove the CO 2 . After passage through the KOH solution, the gas contains N 2 and is saturated with water vapor. In a given experiment a 0.253-g sample of a compound produced 31.8 mL N 2 saturated with water vapor at 25°C and 726 torr. What is the mass percent of nitrogen in the compound? (The vapor pressure of water at 25°C is 23.8 torr.)
The nitrogen content of organic compounds can be determined by the Dumas method. The compound in question is first reacted by passage over hot CuO(s):
Compound
→
CuO(
s
)
Hot
N
2
(
g
)
+
CO
2
(
g
)
+
H
2
O
(
g
)
The product gas is then passed through a concentrated solution of KOH to remove the CO2. After passage through the KOH solution, the gas contains N2 and is saturated with water vapor. In a given experiment a 0.253-g sample of a compound produced 31.8 mL N2 saturated with water vapor at 25°C and 726 torr. What is the mass percent of nitrogen in the compound? (The vapor pressure of water at 25°C is 23.8 torr.)
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.
What is the final product when hexanedioic acid reacts with 1º PCl5 and 2º NH3.
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