Gmail 9:43 AM Tue Nov 19 CozortExam-2 Fall 2024 copy fx ... Home Insert Draw Page Layout Formulas Data Review View AŒŒ < A✓ = Enter text or formula here A D E G H 8 9 3-In a phosphorous acid solution, the starting concentration is C₁ = [H2PHO3] = 3.18 10 (*Define) 11 Define: = x = 12 13 => = = ( 14 ("Calculate) 15 pH = 16 (*Define) numeral 17 => pH 18 (*Calculate) 19 20 Define: = 21 numeral unit 22 => [PO3² (aq)] = 23 (*Calculate) 24 K M N о P Q 99% General S T U V M, find the equilibrium concs. of [H3O+], [HPO3¯(aq)], [PO3²¯], and the pH knowing that (Ka₁ = 3.0x102, Ka2 = 1.66x107) ? [HPO3 (aq)] [H3O+] Ca Και )1/2 numeral unit = X )1/2 + [H3O+] log [OH-] x y Ka2 ) 1/2 [H3O+] [PO3(aq)] 4- Determine the [HPO3], [H₂PO3] as well as [H3O+] & [OH-] concentrations in a sodium phosphite Na₂PO3 salt solution at a conc of Cs = [PO3²] = 22222 26 Define: 28 30 => 31 (*Calculate) = X = = = ( numeral unit 0.017 M (Kai 3.0x102, Kaz 1.66x107) ? [HPO3(aq)] [OH-] Cs. Ka2 1/2 Kw Και 1/2 32 33 => [H3O+] = X + 34 (*Define) 35 36 => [H3O+] = 37 (*Calculate) numeral unit => pH (*Calculate) = 38 39 Define: [H2PO3(aq)] = Kbl Και Kw [H3O+] [H2PO3(aq)] Kaz 40 41 numeral unit 42 => [H2PO3(aq)] = 43 (*Calculate) 44 45 46 5-(a) Determine the [H3O+] concentration in a sodium biphosphite Na₂HPO3 salt solution at a conc of Cs = [HPO3] 0.14 M (Kai 3.0x102, Kaz 1.66x107) ? 47 48 Let's test if we can do an approximation where, Cs/ Kal > 100 => 49 Cs Και = 50 50 (Yes we can / No we cannot) apply the approximation. As you might predicted, solve the relations below: 51 52 => [H3O+] = Kal Kw 1/2 Cs Ka2 53 ("Define) 54 numeral unit 55 => [H3O+] = = 56 (*Calculate) 57 58 59 (b) If the sodium biphosphite Na₂HPO3 salt solution at a conc of Cs = [HPO3¯] = 1.5 M is added to a weak acid of 0.05 60 numeral 61 Define: pKal = 62 =>> pkal = (*Calculate) 63 64 Define: => PH = [H3O+] 65 66 67 => pH numeral = 68 69 70 (*Calculate) (c)What mass (g) of sodium biphosphite Na₂HPO3 salt is needed to prepare a buffer of pH = 3 using a 100 71 (*Use pKal obtained in part(b)) 72 Define: => PM 73 74 => PM = 75 (*Calculate) 76 77 Define: => m = 78 79 80 m = (*Calculate) numeral unit = 81 Sheet1 Sheet2 Sheet3 + numeral > < = M phosphorous acid solution. Calculate the pH of this buffer using Henderson Hasselbalch equation? Και Kw Ka2 log + log [H2PO3(aq)] [HPO3(aq)] pkal [OH-] mL volumetric flask when the molarity of the weak acid H2PO3 solution is [H2PO3] = 0.014 M [FW(Na₂HPO3) = 125.96 g/mole] pH ) [H₂PO3(aq)] FW pkal numeral V Log( + 10 e pH PM

Gmail 9:43 AM Tue Nov 19 CozortExam-2 Fall 2024 copy fx ... Home Insert Draw Page Layout Formulas Data Review View AŒŒ < A✓ = Enter text or formula here A D E G H 8 9 3-In a phosphorous acid solution, the starting concentration is C₁ = [H2PHO3] = 3.18 10 (Define) 11 Define: = x = 12 13 => = = ( 14 ("Calculate) 15 pH = 16 (Define) numeral 17 => pH 18 (Calculate) 19 20 Define: = 21 numeral unit 22 => [PO3² (aq)] = 23 (Calculate) 24 K M N о P Q 99% General S T U V M, find the equilibrium concs. of [H3O+], [HPO3¯(aq)], [PO3²¯], and the pH knowing that (Ka₁ = 3.0x102, Ka2 = 1.66x107) ? [HPO3 (aq)] [H3O+] Ca Και )1/2 numeral unit = X )1/2 + [H3O+] log [OH-] x y Ka2 ) 1/2 [H3O+] [PO3(aq)] 4- Determine the [HPO3], [H₂PO3] as well as [H3O+] & [OH-] concentrations in a sodium phosphite Na₂PO3 salt solution at a conc of Cs = [PO3²] = 22222 26 Define: 28 30 => 31 (Calculate) = X = = = ( numeral unit 0.017 M (Kai 3.0x102, Kaz 1.66x107) ? [HPO3(aq)] [OH-] Cs. Ka2 1/2 Kw Και 1/2 32 33 => [H3O+] = X + 34 (Define) 35 36 => [H3O+] = 37 (Calculate) numeral unit => pH (Calculate) = 38 39 Define: [H2PO3(aq)] = Kbl Και Kw [H3O+] [H2PO3(aq)] Kaz 40 41 numeral unit 42 => [H2PO3(aq)] = 43 (Calculate) 44 45 46 5-(a) Determine the [H3O+] concentration in a sodium biphosphite Na₂HPO3 salt solution at a conc of Cs = [HPO3] 0.14 M (Kai 3.0x102, Kaz 1.66x107) ? 47 48 Let's test if we can do an approximation where, Cs/ Kal > 100 => 49 Cs Και = 50 50 (Yes we can / No we cannot) apply the approximation. As you might predicted, solve the relations below: 51 52 => [H3O+] = Kal Kw 1/2 Cs Ka2 53 ("Define) 54 numeral unit 55 => [H3O+] = = 56 (Calculate) 57 58 59 (b) If the sodium biphosphite Na₂HPO3 salt solution at a conc of Cs = [HPO3¯] = 1.5 M is added to a weak acid of 0.05 60 numeral 61 Define: pKal = 62 =>> pkal = (Calculate) 63 64 Define: => PH = [H3O+] 65 66 67 => pH numeral = 68 69 70 (Calculate) (c)What mass (g) of sodium biphosphite Na₂HPO3 salt is needed to prepare a buffer of pH = 3 using a 100 71 (Use pKal obtained in part(b)) 72 Define: => PM 73 74 => PM = 75 (Calculate) 76 77 Define: => m = 78 79 80 m = (*Calculate) numeral unit = 81 Sheet1 Sheet2 Sheet3 + numeral > < = M phosphorous acid solution. Calculate the pH of this buffer using Henderson Hasselbalch equation? Και Kw Ka2 log + log [H2PO3(aq)] [HPO3(aq)] pkal [OH-] mL volumetric flask when the molarity of the weak acid H2PO3 solution is [H2PO3] = 0.014 M [FW(Na₂HPO3) = 125.96 g/mole] pH ) [H₂PO3(aq)] FW pkal numeral V Log( + 10 e pH PM

World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter1: Chemistry: An Introduction

Section: Chapter Questions

Problem 7A

See similar textbooks