Question 1:
The irreversible acid-base chemical reaction among the options provided is:
- Strong acid added to water
Question 2:
The correct statement about hydrochloric acid and acetic acid is:
- The dissociation constant for hydrochloric acid is greater than the dissociation constant for acetic acid.
Question 3:
To determine the order of acidic solutions from least conductive to most conductive based on their pH values:
- HA, HC, HB
(HA has the highest pH, thus is the weakest acid and least conductive, while HB has the lowest pH and is the strongest acid, thus most conductive.)
Question 4:
The change that would decrease the pH of a base in a solution at equilibrium is:
- Decreasing the concentration of OH– ions
This is because decreasing the concentration of hydroxide ions (OH–) would shift the equilibrium towards producing more hydrogen ions (H3O+), thereby lowering the pH.