In order to change the pH of a solution from 2.0 to 4.0 the [H3O⁺] must:
Increase by a factor of 2.
Increase by a factor of 100.
Decrease by a factor of 2.
Decrease by a factor of 100.
According to Lewis, a base is:
A proton donor.
A proton acceptor.
An electron pair donor.
An electron pair acceptor.
Consider the following graph for the titration of 0.1M NH3 with 0.1M HCl.
A buffer solution is present at point.
I.
IV.
II.
III.
According to the Lewis definition, a base is a(n):
Hydroxide ion donor.
Electron pair donor.
Proton donor.
Hydrogen ion donor.
Consider the following:
I. PO4³⁻
II. HPO4²⁻
III. H2PO4⁻
IV. H3PO4
The term amphiprotic can be used to describe:
I only.
II, III and IV only.
II and III only.
I, II and III only.
