Polyprotic acids contain more than one dissociable proton. Each dissociation step has its own acid-dissociation constant,...
Polyprotic acids contain more than one dissociable proton. Each dissociation step has its own acid-dissociation constant, Ka1, Ka2, etc. For example, a diprotic acid H2A reacts as follows:
| H2A(aq)+H2O(l)⇌H3O+(aq)+HA−(aq) |
| Ka1=[H3O+][HA−][H2A] |
| HA−(aq)+H2O(l)⇌H3O+(aq)+A2−(aq) |
| Ka2=[H3O+][A2−][HA−] |
In general, Ka2 = [A2−] for a solution of a weak diprotic acid because [H3O+]≈[HA−].
Many household cleaning products contain oxalic acid, H2C2O4, a diprotic acid with the following dissociation constants: Ka1=5.9×10−2, Ka2=6.4×10−5
Part A) Calculate the equilibrium concentration of H3O+ in a 0.20 M solution of oxalic acid. Answer = 0.083 M
Part B) The question i need help on!
Calculate the equilibrium concentration of C2O42− in a 0.20 M solution of oxalic acid. Express your answer to two significant figures and include the appropriate units.
Homework Answers
Add Answer to:
Polyprotic acids contain more than one dissociable proton. Each
dissociation step has its own acid-dissociation constant,...
Determine the concentration of all chemical species found in a solution of 0.20M oxalic acid (H2C2O4)...
Determine the concentration of all chemical species found in a solution of 0.20M oxalic acid (H2C2O4) a diprotic acid with Ka1=5.9*10^-2 and Ka2=6.5*10^-5. (Hint: start by writing the two equilibrium that describes the dissociation of the diprotic acid) Determine the pH of the solution. is H3O+ produced in the second equilibrium negligible?
Consider the acid dissociation reactions and for the diprotic acid H2A: H2A(aq) + H2O (l) --><--...
Consider the acid dissociation reactions and for the diprotic acid H2A: H2A(aq) + H2O (l) --><-- HA-(aq) + H3O+(aq) pKa1= 3 H2A(aq) + H2O (l) --><-- A2- (aq) + H3O+(aq) pKa2= 8 Would a salt solution of KHA be acidic, basic or neutral? a) Acidic b) Basic c) Neural
Determine the concentration of H3O+ in a 0.064 M solution of oxalic acid, H2C2O4.
Determine the concentration of H3O+ in a 0.064 M solution of oxalic acid, H2C2O4.H2C2O4(aq)+H2O(l) ⇌ H3O+(aq)+HC2O−4(aq) Ka1=0.054HC2O−4(aq)+H2O(l) ⇌ H3O+(aq)+C2O2−4(aq) Ka2=5.4×10−5
A diprotic acid, H2A, has acid dissociation constants of Ka1=1.01×10−4 and Ka2=4.08×10−12. Calculate the pH and...
A diprotic acid, H2A, has acid dissociation constants of
Ka1=1.01×10−4 and Ka2=4.08×10−12. Calculate the pH and molar
concentrations of H2A, HA−, and A2−at equilibrium for each of the
solutions.
A diprotic acid, H, A, has acid dissociation constants of Kal = 1.01 x 104 and K22 = 4.08 x 10-12. Calculate the pH and molar concentrations of H, A, HA, and A? at equilibrium for each of the solutions. A 0.176 M solution of H, A. pH= pH = 1...
A diprotic acid, H,A, has acid dissociation constants of Ka1 = 2.09 x 104 and Ka2...
A diprotic acid, H,A, has acid dissociation constants of Ka1 = 2.09 x 104 and Ka2 = 3.96 x 10-11. Calculate the pH and molar concentrations of H,A, HA-, and A2- at equilibrium for each of the solutions. A 0.183 M solution of H,A pH H,A= A2-1 HA] = A 0.183 M solution of N2HA. HA pH= HA A2- A 0.183 M solution of Na, A H,A ] pH= HA A2-1 M M
A diprotic acid, H,A, has acid dissociation...
Oxalic acid (HOOC-COOH) is a simple diprotic acid. It is used commercially in bleaching straw and...
Oxalic acid (HOOC-COOH) is a simple diprotic acid. It is used commercially in bleaching straw and leather and removing rust and ink stains. a. Write each dissociation step for the acid including the K values from appendix C. b. What are the equilibrium concentrations of [H2C2O4], [HC2O4- ], and [C2O42- ] in a 0.150M H2C2O4 solution. (Hint: the concentrations of [H2C2O4], [HC2O4- ] are found together and used to find concentration of [C2O42- ].) c. What is the pH of...
A diprotic acid, H2A, has acid dissociation constants of Kai = 3.52 x 10-4 and Ka2...
A diprotic acid, H2A, has acid dissociation constants of Kai = 3.52 x 10-4 and Ka2 = 2.03 × 10-11 . Calculate the pH and molar concentrations of H2A, HA, and A2- at equilibrium for each of the solutions. A 0.206 M solution of H,A. pH = H2A] HA1 A 0.206 M solution of NaHA pH- [H2A] = [HA-] = A 0.206 M solution of Na,A. pH- [H2A] EA T [A21
A diprotic acid, H,A, has acid dissociation constants of Ka molar concentrations of H,A, HA-, and...
A diprotic acid, H,A, has acid dissociation constants of Ka molar concentrations of H,A, HA-, and A2- at equilibrium for each of the solutions 1.42 x 10-4 and Ka2 = 4.07 x 1012. Calculate the pH and = A 0.210 M solution of H,A H2A] = pH HA- A2- М М A 0.210 M solution of NaHA HA pH= М
A diprotic acid, H2A,H2A, has acid dissociation constants of ?a1=4.15×10−4Ka1=4.15×10−4 and ?a2=3.73×10−12.Ka2=3.73×10−1...
A diprotic acid, H2A,H2A, has acid dissociation constants of ?a1=4.15×10−4Ka1=4.15×10−4 and ?a2=3.73×10−12.Ka2=3.73×10−12. Calculate the pH and molar concentrations of H2A,H2A, HA−,HA−, and A2−A2− at equilibrium for each of the solutions. A 0.176 M0.176 M solution of H2A.H2A. pH = [H2A]=[H2A]= MM [HA−]=[HA−]= MM [A2−]=[A2−]= MM A 0.176 M0.176 M solution of NaHA.NaHA. pH= [H2A]=[H2A]= MM [HA−]=[HA−]= MM [A2−]=[A2−]= MM A 0.176 M0.176 M solution of Na2A.Na2A. pH= [H2A]=[H2A]= MM [HA−]=[HA−]= MM [A2−]=[A2−]= M
Worksheet 19 Titration of Polyprotic Acids Name: 1. Calculate the sulfite ion [SO3'] concentration in a...
Worksheet 19 Titration of Polyprotic Acids Name: 1. Calculate the sulfite ion [SO3'] concentration in a 0.123 M solution of the weak acid, sulfurous acid (H2SO3). The stepwise dissociation constants of carbonic acid are: Ka1 1.41 x 102 Ka2-6.31 x 108 3. Consider the following dissociation of the triprotic acid, phosphoric acid (HsPOs): Step 1 H3POa + H2O <=> H30+ + H2PO4, Step 2 HP0i + H2O <=> H30+ + HP042- Step 3 HPO42-+ H2O <-> H3O+ + PO43- Kal=7.1...
A diprotic acid, H2A, has acid dissociation constants of
Ka1=1.01×10−4 and Ka2=4.08×10−12. Calculate the pH and molar
concentrations of H2A, HA−, and A2−at equilibrium for each of the
solutions.
A diprotic acid, H, A, has acid dissociation constants of Kal = 1.01 x 104 and K22 = 4.08 x 10-12. Calculate the pH and molar concentrations of H, A, HA, and A? at equilibrium for each of the solutions. A 0.176 M solution of H, A. pH= pH = 1...
A diprotic acid, H,A, has acid dissociation constants of Ka1 = 2.09 x 104 and Ka2 = 3.96 x 10-11. Calculate the pH and molar concentrations of H,A, HA-, and A2- at equilibrium for each of the solutions. A 0.183 M solution of H,A pH H,A= A2-1 HA] = A 0.183 M solution of N2HA. HA pH= HA A2- A 0.183 M solution of Na, A H,A ] pH= HA A2-1 M M
A diprotic acid, H,A, has acid dissociation...
A diprotic acid, H2A, has acid dissociation constants of Kai = 3.52 x 10-4 and Ka2 = 2.03 × 10-11 . Calculate the pH and molar concentrations of H2A, HA, and A2- at equilibrium for each of the solutions. A 0.206 M solution of H,A. pH = H2A] HA1 A 0.206 M solution of NaHA pH- [H2A] = [HA-] = A 0.206 M solution of Na,A. pH- [H2A] EA T [A21
A diprotic acid, H,A, has acid dissociation constants of Ka molar concentrations of H,A, HA-, and A2- at equilibrium for each of the solutions 1.42 x 10-4 and Ka2 = 4.07 x 1012. Calculate the pH and = A 0.210 M solution of H,A H2A] = pH HA- A2- М М A 0.210 M solution of NaHA HA pH= М
Worksheet 19 Titration of Polyprotic Acids Name: 1. Calculate the sulfite ion [SO3'] concentration in a 0.123 M solution of the weak acid, sulfurous acid (H2SO3). The stepwise dissociation constants of carbonic acid are: Ka1 1.41 x 102 Ka2-6.31 x 108 3. Consider the following dissociation of the triprotic acid, phosphoric acid (HsPOs): Step 1 H3POa + H2O <=> H30+ + H2PO4, Step 2 HP0i + H2O <=> H30+ + HP042- Step 3 HPO42-+ H2O <-> H3O+ + PO43- Kal=7.1...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago