Question

Help me choose the weakest acid?
1. H2Se, H2O, H2Te, or H2S
2. H2SeO4, H2SeO3, H2SO3, or H2SO4
3. HClO3, H2Se, HBr, HNO3

Answer 1

in 1) H2Te(down the group basicity increases)
2) i m nt sure in this had confusion in H2SeO4 and H2SeO3
3)H2Se (reason all halongens are acidic means cl and br while HNO3 i also acidic u can apply down the group basicity increases)

Answer 2

small pH number = stronger acid/weaker base if i recall correctly

how to apply that here i dont know :)

Answer 3

thank you!

Answer 4

:)