Consider the following data on some weak acids and weak bases: base acid K Kb name formula name formula hydrofluoric acid HF 6.8 x 10 5 hydrocyanic acid HCN 4.9 × 10 10 ammonia NH3 1.8 × 10 pyridine C5H5N 1.7 × 10 9 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 M NH4Bг 0.1 M KI 0.1 M C5H5NHCI choose one choose one choose onev 0.1 M NaF choose onev X 5

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.

Complete the following table by calculating the missing entries. In each case indicate whether the solution is acidic or basic. PH 5.85 POH 12.45 [H+] ΣΙ 4.60 x 10-10 M M [OH-] M M M 7.30 x 10-1⁰0 M acidic or basic? acidic basic acidic basic acidic basic acidic basic

Consider the following data on some weak acids and weak bases: acid base Ka name formula name formula hypochlorous acid HC1O 3.0 × 10-8 NH3 1.8 x 10 ammonia acețic acid HCH3CO2 1.8 × 10 ethylamine C2H;NH,|6.4×10-4 Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' 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 M NH4CI choose one 0.1 M Naclo choose one v 0.1 М KсI choose one v 0.1 M C2H5NH3Br choose one v

Consider the following data on some weak acids and weak bases: base acid Κα a Ко name formula name formula hydrofluoric acid 4 HF 6.8 × 10 pyridine CH&N 1.7x10 acetic acid HCH3CO2 1.8 × 10¯¯ methylamine CH3NH2 4.4 × 10¯ -4 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. 0.1 M KCI solution PH ✓ choose one 1 (lowest) 0.1 M CH3NH3Br 0.1 M C5H5NHCI 0.1 M NaF 2 3 4 (highest) choose one v Х

Consider the following data on some weak acids and weak bases: name acetic acid hydrocyanic acid acid solution 0.1 M NaCH3CO2 0.1 M HONH3CI 0.1 M KNO3 0.1 M KCN Ka formula HCH₂CO₂ 1.8 x 10-5 HCN 4.9 × 10 X 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 - 10 choose one ŵ choose one ŵ choose one ŵ choose one î S base name Kh formula ethylamine C₂H5NH₂ 6.4 × 107 hydroxylamine HONH, | 1.1 × 10 - 8

Each value represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or neutral. POH = 13.92 Acidic pH = 12.53 [OH-] = 6.1 × 10-⁹ Basic [H+] = 9.2 x 10-5 pH = 3.20 Answer Bank [OH-] = 7.6 x 10-5 POH Neutral [H+] = 4.61 = 1.0 × 10-7 POH = 7.00 [H+] = 5.7 x 10-11

Indicate whether the solution is acidic, basic or neutral. Solution pH = 2.4 Acidic Basic Neutral pH = 9.1 %3D РОН 3 6.5 РОН 3D 10.8 1.4 x 104 M NaOH 3.1 х 106 М НСІ [OH] = 1.1 x 10-9 M [H*] = 2.0 x 104 M

Part 1 of 2 Determine the pH of a 0.25 M NH3 solution. Round your answer to 2 decimal places. Note: K₂ for NH3 is 1.78 × 10 b pH = Part 2 of 2 x10 pH = × Determine the pH of a solution that is 0.25 M NH3 and 0.35 M NH4C1. Round your answer to 2 decimal places. Ś x10

Which of the following pH values indicates greater concentration of base? Group of answer choices pH 9 pH 12 pH 5 pH 1 pH 7