In the laboratory, a general chemistry student measured the pH of a 0.592 M aqueous solution of triethanolamine, C6H15O3N to be 10.781. Use the information she obtained to determine the Kb for this base. Kb(experiment) =

Explanation:

Hello,

In this case, given the pH of the base, we can compute the pOH as shown below:

Next, we compute the concentration of the hydroxyl ions when the triethanolamine is dissociated:

Then, by writing the equilibrium expression for the dissociation of triethanolamine we have:

That is suitable for the direct computation of Kb, knowing that based on the ICE procedure, equals the concentration of hydroxyl ions that was previously, computed, therefore, we have:

Regards.

c is the answer because when something is left after something evaporates that shows the chemical change.