We need to determine how is the PH in the given mixtures:
A) A weak base and a strong acid:
Acid and base react to form an acidic solution and, being acidic, this results in a solution with a pH lower than 7
B) A strong base and a strong acid:
When mixing a strong base and a strong acid, neutralization occurs, that is, a neutral pH or equal to 7 is obtained
C) A strong base and acid:
If we have a weak acid, when adding a strong base the pH approaches neutrality without sudden changes, but once the acid has been neutralized, just add a few drops of excess soda to obtain a sudden increase in pH as if there were only base. free. In this case, at the equivalence point the pH> 7
ANSWER:
A) Less than 7
B) Equal to 7
C) Greater than 7
