Based on patterns in the periodic table, which list shows the acids in order from strongest to weakest?

Question

(1 point)
Responses

HCl, H2S, PH3
HCl, H 2 S, PH 3

PH3, H2S, HCl
PH 3 , H 2 S, HCl

H2S, PH3, HCl
H 2 S, PH 3 , HCl

HCl, PH3, H2S

Answer 1

To determine the order of acidity from strongest to weakest among the given acids, we can consider the following:

1. HCl (hydrochloric acid): This is a strong acid, known for its complete dissociation in water.
2. H2S (hydrosulfuric acid): This is a weak acid, as it does not completely dissociate in water.
3. PH3 (phosphine): This is not considered an acid in the same way as the other two; it is more basic and behaves like a weak base rather than an acid.

Thus, in terms of acidity, HCl is the strongest, followed by H2S, and then PH3, which is effectively not an acid.

Thus, the correct order from strongest to weakest acid is:

HCl, H2S, PH3.