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Acids and Bases: Conjugate

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Wize University Chemistry Textbook > Acids and Bases

Definitions of Acids and Bases

1 Activity

Wize University Chemistry Textbook > Acids and Bases

Conjugate Acid-Base Pairs

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In each equation, label the acids, bases and conjugate acid-base pairs
  1. NH3+H3PO4↔NH4++H2PO4−NH_3+H_3PO_4 \leftrightarrow NH^+_4+H_2PO^-_4
  2. CH3O−+NH3↔CH3OH+NH2−CH_3O^-+NH_3 \leftrightarrow CH_3OH+NH^-_2
  3. HPO42−+HSO4−↔H2PO4−+SO42−HPO_4^{2-} +HSO_4^- \leftrightarrow H_2PO^-_4+SO^{2-}_4
More Definitions of Acids and Bases Questions:
Acid Base Intro Activity
Does BH3 act as a lewis acid or lewis base?
In the reaction below which compound is the Lewis acid?
In the reaction below which compound is the Lewis acid?
In the reaction below which compound is the Lewis acid?
Which of the following are Lewis Acids?
Acids and Bases: Definitions
The definition of an amphoteric compound is:
In the reaction below which compound is the Lewis acid?
Acids and Bases
Choose the compounds below that are likely to function as Lewis Acids
How many pairs below represent a conjugate acid/base pair?
HCl / OCl−HCl\ /\ OCl^-
H2SO4/SO42−H_2SO_4/SO_4^{2-}
Acid Base Intro Activity
Does BH3 act as a lewis acid or lewis base?
Consider the following two questions regarding solubility and acid/base chemistry:
More Conjugate Acid-Base Pairs Questions:
In a reaction, which of the following could be conjugate acid-base pairs?
Weak Acids and Bases
Will HCO3- act as an acid or as a base?
Weak Acids and Bases
Sulfurous acid (H2SO3) is a diprotic weak acid (pKa1 = 1.85, pKa2 = 7.20). Bisulfite (HSO3-) is the conjugate base of sulfurous acid and is an amphoteric species (can act as an acid or a base). Will HSO3- act as an acid or as a base?
In the reaction HSO4−(aq) + OH−(aq) ⇌ SO42−(aq) + H2O (l)HSO_4^-\left(aq\right)\ +\ OH^-\left(aq\right)\ ⇌\ SO_4^{2-}\left(aq\right)\ +\ H_2O\ \left(l\right) the conjugate acid-base pairs are
Select which of the following WOULD NOT be a conjugate acid/base pair.
Consider the weak bases below and their Kb values:
C6H7O Kb = 1.3 x 10-10
C2H5NH2 Kb = 5.6 x 10-4
Consider the following reaction:
NH4++OH−⇌H2O+NH3NH^{4+}+OH^-\rightleftharpoons H_2O+NH_3
Choose the INCORRECT statement
Using the incomplete reaction below, choose the completed equilibrium which indicates the correct association of conjugate acid base pairs.
HCl+H2O⇌\rm HCl\quad+\quad H_2O\quad \xrightleftharpoons{\hspace{1.5cm}}
**#1 and #2 designate the two sets of conjugate acid base pairs present in each equilibrium**
Consider the weak bases below and their Kb values:
C6H7OKb=1.3×10−10C_6H_7O \hspace{48pt}K_b=1.3 \times 10^{-10}
C2H5NH2Kb=5.6×10−4C_2H_5NH_2 \hspace{30pt}K_b=5.6 \times 10^{-4}
In the reaction HSO4(aq)−+OH(aq)−⇌SO4(aq)2−+H2O(l)HSO^-_{4(aq)}+OH^-_{(aq)} \rightleftharpoons SO^{2-}_{4(aq)}+H_2O_{(l)}the conjugate acid-base pairs are
To 2L of pure water is added Mg(ClO4)2. What would the effect on pH be?
Triemethylamine (N(CH3)3) is a base (pKb=4.19) used in a variety of organic reactions. It can also be used as an effective Lewis base due to it's small steric profile.
if a solution of [N(CH3)3H]2[SO4]is dissolved in neutral water the pH will be,
A series of solutions are formed with strontium salts of the form SrX2 where X=F, Cl, Br, I.
Which of the solutions will have the highest pH?
Pure water has a pH of 7.00. 1.1g of MgBr2 is added to 15L of pure water. The solubility of MgBr2 in water is approximatly 101.5g/L. What is the pH of the resulting solution?
Using the incomplete reaction below, choose the completed equilibrium which indicates the correct association of conjugate acid base pairs.
HCl+NH3⇌\rm HCl\quad+\quad {NH_3}\quad \xrightleftharpoons{\hspace{1.5cm}}
**#1 and #2 designate the two sets of conjugate acid base pairs present in each equilibrium**
Using the incomplete reaction below, choose the completed equilibrium which indicates the correct association of conjugate acid base pairs.
+CH3COOH⇌H2O+Na+CH3COO−\rm \quad+\quad {CH_3COOH}\quad \xrightleftharpoons{\hspace{1.5cm}}\quad H_2O\quad+\quad Na^+CH_3COO^-
**#1 and #2 designate the two sets of conjugate acid base pairs present in each equilibrium**
Using the incomplete reaction below, choose the completed equilibrium which indicates the correct association of conjugate acid base pairs.
HCl+H2O⇌\rm HCl\quad+\quad H_2O\quad \xrightleftharpoons{\hspace{1.5cm}}
**#1 and #2 designate the two sets of conjugate acid base pairs present in each equilibrium**
Acids and Bases: Conjugate
Using the data in the table, which of the conjugate bases below is the strongest base?
AcidKaHOAc1.8×10−5HCHO21.8×10−4HClO3.0×10−8HF6.8×10−4\def\arraystretch{1.5} \begin{array}{c} \hline \rm Acid &&&K_a\\ \hline HOAc&&&1.8 \times 10^{-5}\\ HCHO_2&&&1.8 \times 10^{-4}\\ HClO &&& 3.0 \times 10^{-8}\\ HF &&& 6.8 \times 10^{-4}\\ \hline \end{array}
Acids and bases: Conjugate identification
In the reaction HSO4-(aq) + OH-(aq) ⇌ SO42-(aq) + H20(l), the conjugate acid-base pairs are:
B is a weak base. Which equilibrium corresponds to the equilibrium constant Ka for HB+?
Acids and Bases: Conjugate Acid-base Pairs
Indicate how many of these combinations are conjugate acid-base pairs. Select all that apply.