pH of Weak Acids 19. Consider the following acids; CH5COOH ( benzoic acid) Ka = 6.14x10-5...
Consider the following unfinished table of weak acids with their corresponding pKa values and Ka values. Weak Acid pka 3.35 ка HNO2 HF HCN - 6.8*10-4 9.31 Arrange these three acids in order of increasing acid strength. (weakest) HCN <HF < HNO2 (strongest) n (weakest) HCN <HNO2 <HF (strongest) (weakest) HF <HNO2 <HCN (strongest) d (weakest) HNO2 <HCN <HF (strongest) Ce (weakest) HNO2 <HF <HCN (strongest)
Exercise 1: Consider the following information for a series of solutions of weak acids, HA: Weak acid PK, К. If [HA], is... then [H3O+]E ... and pH HCOOH 3.74 1.8 x 10-4 0.100 M 4.2 x 10² M 2.38 HNO2 3.37 4.2 x 10-4 0.100 M 6.3 x 10-M 2.20 HCN 9.20 6.3 x 10-10 0.100 M 7.9 x 10ⓇM 5.10 4.23 0.100 M 5.9 10-M HOCI 7.46 3.5 x 10-8 0.200 M 8.3 x 10M 4.07 0.400 M 1.2...
Help plz Close Problens Calculate the pH of a weak acid solution (IHAb 100.Ka). Calculate the pH of a 0.406 M aqueous solution of nitrous acid (HNO,, K-4.5x10) and the equilibrium concentrations of the weak acid and its conjugate base. pHH [HNO2 lequilibrium NO2 lequilbrium Show Approach
5) Of the following acids, ________ is a strong acid. A) HNO2 B) H2CO3 C) HNO3 D) HClO 6) Calculate the hydrogen ion concentration in a solution of iced tea with lemon having a pH of 2.87. A) 2.9 x 10–2 M C) 1.3 x 10–3 M 7) Which one of the following is the weakest acid? A) HF (Ka = 6.8 × 10-4) B) HClO (Ka = 3.0 × 10-8) C) HNO2 (Ka = 4.5 × 10-4) D) HCN...
Consider the following data on some weak acids and weak bases: acid base Ka Кь name formula name formula -4 hydrofluoric acid HF 6.8 x 10 ammonia NHZ -5 1.8 x 10 4 HNO2 4.5 x 10 -4 nitrous acid ethylamine C2H5NH2 6.4 x 10 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...
Consider the following data on some weak acids and weak bases: acid base ka Кь name formula name formula HNO2 4.5 x 10 -4 nitrous acid - 8 hydroxylamine HONH2 1.1 x 10 hydrocyanic acid -10 4.9 x 10 HCN -10 aniline CH-NH2 4.3 * 10 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...
1. A weak acid (benzoic acid) is titrated with a strong base such as sodium hydroxide. Determine the pH at the half equivalence point of the titration. The Ka of the weak acid is 6.3 x 10-5. 2.Calculate the pH of a buffer made from 0.6 M HNO2 and 0.5 M NaNO2. Ka = 4.5 x 10-5 pKa = 4.3 Answer with one digit after the decimal place (e.g. 2.1) Hint: HNO2 is a weak acid. NaNO2 forms the conjugate...
24) Classify the following compounds as weak acids (W) or strong acids (S): benzoic acid nitric acid acetic acid B) WWW A) SWW C) WSS E) SSS D) WSW
Consider the following data on some weak acids and weak bases: acid Ka name formula nitrous acid HNO2 ×4.510−4 acetic acid HCH3CO2 ×1.810−5 base Kb name formula ammonia NH3 ×1.810−5 ethylamine C2H5NH2 ×6.410−4 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...
Determine the pH of each of the following solutions. (a) 0.213 M boric acid (weak acid with Ka = 5.8e-10). (b) 0.394 M phenol (weak acid with Ka = 1.3e-10). (c) 0.869 M pyridine (weak base with Kb = 1.7e-09).