We’re being asked to calculate the pH of a 0.24 M aniline solution given the Kb of 3.8x10-10
In this case, we have to follow the steps:
Step 1. Setup the equilibrium and ICE chart
Step 2. Calculate x or OH-
Step 3. Calculate pH
Step 1. The formula for aniline is C6H5NH2 and its reaction with water is:
C6H5NH2 + H2O ⇌ C6H5NH3+ + OH-
We need to write an ICE chart to determine the concentration of OH- which we will use to get the pOH, then the pH.
We know that the equilibrium constant expression, Kb is:
What is the pH of a 0.24 M solution of aniline (C6H5NH2, Kb = 3.8 × 10–10) at 25°C?
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Weak Bases concept. If you need more Weak Bases practice, you can also practice Weak Bases practice problems.