The equilibrium for the reaction between (CH3)2NH(CH3)2NH, a weak base, and water is represented by the equation below. The table shows the pHpH of three solutions of (CH3)2NH(aq)(CH3)2NH(aq) at 25°C25°C. (CH3)2NH(aq)+H2O(l)⇄(CH3)2NH2+(aq)+OH-(aq)Kb=5.4×10−4at25°C(CH3)2NH(aq)+H2O(l)⇄(CH3)2NH2+(aq)+OH−(aq)Kb=5.4×10−4at25°C [(CH3)2NH][(CH3)2NH] pH at25°CpH at25°C 0.050 11.69 0.10 11.85 0.20 12.01 Based on the information given, which of the following is true? a.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pOHpOH because to reach equilibrium a smaller amount of the conjugate acid (CH3)2NH2+(CH3)2NH2+ is produced. b.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pOHpOH because to reach equilibrium more OH−OH− is produced. c.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pHpH because to reach equilibrium a smaller amount of the conjugate acid (CH3)2NH2+(CH3)2NH2+ is produced. d.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pHpH because to reach equilibrium more OH−OH− is produced.
The equilibrium for the reaction between (CH3)2NH(CH3)2NH, a weak base, and water is represented by the equation below. The table shows the pHpH of three solutions of (CH3)2NH(aq)(CH3)2NH(aq) at 25°C25°C.
(CH3)2NH(aq)+H2O(l)⇄(CH3)2NH2+(aq)+OH-(aq)Kb=5.4×10−4at25°C(CH3)2NH(aq)+H2O(l)⇄(CH3)2NH2+(aq)+OH−(aq)Kb=5.4×10−4at25°C
| [(CH3)2NH][(CH3)2NH] | pH at25°CpH at25°C |
|---|---|
| 0.050 | 11.69 |
| 0.10 | 11.85 |
| 0.20 | 12.01 |
Based on the information given, which of the following is true?
a.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pOHpOH because to reach equilibrium a smaller amount of the conjugate acid (CH3)2NH2+(CH3)2NH2+ is produced.
b.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pOHpOH because to reach equilibrium more OH−OH− is produced.
c.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pHpH because to reach equilibrium a smaller amount of the conjugate acid (CH3)2NH2+(CH3)2NH2+ is produced.
d.Solutions with a higher concentration of (CH3)2NH(CH3)2NH have a higher pHpH because to reach equilibrium more OH−OH− is produced.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
