Consider the following data on some weak acids and weak bases: acid base Ka name formula name formula НCH,CO,| 1.8 х 10 |C,H5NH, 4.3 × 10 - 10 -5 acetic acid aniline hydrofluoric acid HF 6.8 × 10 ethylamine C,H5NH, 6.4 × 104 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. solution pH 0.1 М KF choose one 0.1 M C2H5NH3CI choose one 0.1 M NaCI choose one 0.1 M NaCH3CO2 choose one

Consider the following data on some weak acids and weak bases: name hydrocyanic acid acid hypochlorous acid 0.1 M KCI solution 0.1 M C6H5NH3Br 0.1 M HONH3Cl 0.1 M KCN formula HCN 4.9 × 10 HCIO Ka X - 10 3.0 × 10 pH 8 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. ✓ choose one C 1 (lowest) 2 3 4 (highest) C 5 C choose one î name base formula - 8 hydroxylamine HONH₂ 1.1 × 10 aniline Kh CoH5NH2|4.3 × 10 - 10

Hydrogen selenide (H2Se) reacts with water according to the following equation. H2Se + H2O → SeH– + H3O+ Can you identify the acid, base, conjugate acid, and conjugate base in this reaction? Use patterns in the periodic table to explain why the substances you identified acted as the acid and the base in this reaction.

Consider the following data on some weak acids and weak bases: name acetic acid hydrofluoric acid 0.1 M KF acid 0.1 M NaCH3CO₂ solution 0.1 M NH4Cl 0.1 M KI formula HCH3CO₂ 1.8 × 10 HF K₁ a X 6.8 × 10 Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. pH choose one choose one -4 choose one ✓ choose one Ś name base formula Kh ammonia NH3 aniline C6H5NH₂ 4.3 × 107 - 10 1.8 × 10