🤓 Based on our data, we think this question is relevant for Professor Randles' class at UCF.
Which is a stronger base, S2 - or Se2-?
We are asked which is the stronger base, S2- or Se2-.
The conjugate base of an acid is the species formed after an acid donates a proton. The general reaction is as follows:
Acid + Base ⇌ Conjugate Base + Conjugate Acid
The strengths of conjugate bases of binary acids are based on the electronegativity of the nonmetal in the binary acid.
A conjugate base is considered stronger when its binary acid is weaker.
The binary acids counterparts are:
The reaction forming the conjugate bases are:
H2S +H2O ⇌ H3O+ + S2-
H2Se + H2O ⇌ H3O+ + Se2-
We’ll rank their strength based on the electronegativity of the nonmetal in each binary acid.