Methadone, C21H27ON, is a drug used to treat individuals suffering from opioid addiction. Methadone is a weak base with pKb=5.60. Methadone is frequently administered in the form of its hydrochloride salt, methadone hydrochloride (C21H27ONHCl). Calculate the pH of a 0.200M solution of methadone hydrochloride.

10.)Amphetamine, C9H13N, is a potent central nervous system stimulant used in the treatment of ADHD and other disorders.  The drug is also commonly abused for its stimulant properties.  Amphetamine is a weak base with pKb=4.2.  Amphetamine is frequently administered in the form of its hydrochloride salt, amphetamine hydrochloride (C9H13NHCl).  Calculate the pH of a 0.150M solution of amphetamine hydrochloride.[Refer to page 204 in the lecture note manual for a similar problem or watch the Tutorial Video on Moodle for the calculation of the pH of a solution of a drug salt]

A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH=10.23solution. Ka (HOCl) = 4x10^-8

K, for formic acid, HCOOH, is 1.80x10-4. Ka for acetylsalicylic acid (aspirin), HC,H,04, is 3.00x10-4. Ка Ką for nitrous acid, HNO2, is 4.50x10-4. What is the formula for the weakest conjugate base?

1) Write a chemical reaction to show the neutralization of hydriodic acid (HI) by sodium hydroxide (NaOH).   2) Give the pH that corresponds to each solution and classify it as acidic, basic, or neutral: [H3O+] = 0.01 [H3O+] = 10-9 [H3O+] = 10-7 [H3O+] = 10-5   3) What is the [H3O+] concentration in a solution with a pH of 4?

Ka for benzoic acid, C6H5COOH, is 6.30×10-5.Ka for formic acid, HCOOH, is 1.80×10-4.Ka for hypochlorous acid, HClO, is 3.50×10-8. What is the formula for the weakest conjugate base?

Consider the following data on some weak acids and weak bases: name acetic acid hydrofluoric acid acid solution 0.1 M KCH3CO₂ 0.1 M CH3NH3Br 0.1 M NaI 0.1 M NaF Ka formula HCH3CO₂ 1.8 x 10 HF 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. X -4 pH choose one choose one choose one choose one base Ś Kb formula methylamine CH3NH₂ 4.4 x 107 CHN 1.7×10 9 name pyridine

A chemist must prepare 450.0 mL of nitric acid solution with a pH of 1.60 at 25 °C. He will do this in three steps: • Fill a 450.0 mL volumetric flask about halfway with distilled water. • Measure out a small volume of concentrated (5.0M) stock nitric acid solution and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the volume of concentrated nitric acid that the chemist must measure out in the second step. Round your answer to 2 significant digits. ||mL x10 ?

Study the chemical equations that show how each substance behaves when dissolved in water. Then classify each substance as a Brønsted-Lowry acid, Brønsted-Lowry base, or as neither an acid nor a base. Substance Behavior in water (CH, ),NH (CH, ),NH + H,0= OH + (CH,),NH; СаCl, + H,0 — Н,О + Са2+ + 2CI- HF + H,O = H,0* +F CaCl, HF CH, COOH + H,O=H,0* + CH,C0 co, + H,0 =OH¯ + HCO, CH, COOH co? NH NH + H,0 NH; + H;O* Brønsted-Lowry acid Brønsted-Lowry base Neither an acid nor a base Answer Bank CaCl, co3- (CH,),NH CH;COOH NH† HF

Determine [OH–], pOH and pH of a 0.63 M  aqueous solution of LiC3H5O3 (K b = 7.1×10-11).