Question

use the periodic table to answer the question.
electronegativity
chart showing electronegativity values of elements with a color scale from low (green) to medium (yellow) to high (red)
low medium high
based on patterns in the periodic table, which list shows the acids in order from strongest to weakest?
(1 point)
○ h2s, ph3, hcl
● hcl, h2s, ph3
○ hcl, ph3, h2s
○ ph3, h2s, hcl

Explanation:

To determine the strength of acids (HCl, H₂S, PH₃), we use electronegativity (from the periodic table). The acid strength of binary acids (H - X) increases with the electronegativity of X and the polarity of the H - X bond. Electronegativity values: Cl (3.0), S (2.5), P (2.1). A more electronegative X makes the H - X bond more polar, so the acid is stronger. So HCl (X = Cl, most electronegative) is strongest, then H₂S (X = S), then PH₃ (X = P, least electronegative). Thus, the order from strongest to weakest is HCl, H₂S, PH₃.

Answer:

B. HCl, H₂S, PH₃