In: Chemistry
Which one of these responses is true with regard to a 0.1 M solution of a weak acid HA? EXPLAIN WHY D IS RIGHT
A) [OH–] > [H+]
B) [H+] < [A–]
C) [H+] >[A–]
D) pH > 1.0
E) pH = 1.0
Weak acid does not dissociate completly.
HA H+ + A-
A) [OH-] > [H+] says solution is basic, which is not true because it is an acid solution by dissociation of weak acid.
B) [H+] < [A-] this is not true because the number of H+ and A- ions are same as they are formed by dissociation of one molecule of HA.
C) [H+] < [A-] this is also not true reason as above.
D) pH >1.0 Yes this ti true as it is a weak acid and heance it will have pH>1.
E) pH=1.o this is not nesscesorly true. As acid is a weal acid and hence pH could be around 3-5.
Thus answer is D).