From the given problem statement having three salts NaX (X=A, B or C) , Which ( X - ) has the weakest conjugate acid has to be explained. The three X - anions has to be arranged in the order of decreasing base strength Concept Introduction: Base ionization constant K b The equilibrium expression for the ionization of weak base B will be, B (aq) +H 2 O (l) → HB + (aq) +OH - (aq) K b = [ HB + ] [ OH - ] [ B ] Where K b is base ionization constant, [ OH − ] is concentration of hydroxide ion, [ HB + ] is concentration of conjugate acid, [ B] is concentration of the base Relationship between K a and K b K a × K b = K w Where, K w is autoionization of water. The autoionization of water : K w = [ H + ] [ OH - ] = 1.0 × 10 − 14 In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate. To Explain: Which ( X - ) has the weakest conjugate acid. The three X - anions in the order of decreasing base strength
From the given problem statement having three salts NaX (X=A, B or C) , Which ( X - ) has the weakest conjugate acid has to be explained. The three X - anions has to be arranged in the order of decreasing base strength Concept Introduction: Base ionization constant K b The equilibrium expression for the ionization of weak base B will be, B (aq) +H 2 O (l) → HB + (aq) +OH - (aq) K b = [ HB + ] [ OH - ] [ B ] Where K b is base ionization constant, [ OH − ] is concentration of hydroxide ion, [ HB + ] is concentration of conjugate acid, [ B] is concentration of the base Relationship between K a and K b K a × K b = K w Where, K w is autoionization of water. The autoionization of water : K w = [ H + ] [ OH - ] = 1.0 × 10 − 14 In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate. To Explain: Which ( X - ) has the weakest conjugate acid. The three X - anions in the order of decreasing base strength
Solution Summary: The author explains the equilibrium expression for the ionization of weak base B.
From the given problem statement having three salts
NaX(X=A,Bor C),
Which (
X-) has the weakest conjugate acid has to be explained.
The three
X- anions has to be arranged in the order of decreasing base strength
Concept Introduction:
Base ionization constant
Kb
The equilibrium expression for the ionization of weak base
B will be,
B(aq)+H2O(l)→HB+(aq)+OH-(aq)
Kb=[HB+][OH-][B]
Where
Kb is base ionization constant,
[OH−] is concentration of hydroxide ion,
[HB+] is concentration of conjugate acid,
[B] is concentration of the base
Relationship between
Ka and
Kb
Ka×Kb=Kw
Where,
Kw is autoionization of water.
The autoionization of water:Kw=[H+][OH-]=1.0×10−14
In general, there is a reciprocal relationship between the strength of an acid or base and the strength of its conjugate.
To Explain:
Which (
X-) has the weakest conjugate acid.
The three
X- anions in the order of decreasing base strength
Sodium hypochlorite solution is also known as bleach. It contains the hypochlorite ion ClO-.
(a) Write an equation for the reaction between hypochlorite ion and ammonium ion. Label the acids and bases in the forward and reverse reactions. Identify the two conjugate acid-base pairs.
(b) This equilibrium favors the reactants. Which of the acids is stronger and donates protons more readily?
Consider the following ions: Cl-, HS-, NO2-, F-, and HS04-.
(a) Which of these ions in water gives an acidic solution? Which gives a basic solution?
(b) Which of these ions will have no effect on the pH of an aqueous solution?
(c) Which ion is the strongest base?
(d) Write a chemical equation for the reaction of the strongest basic ion with water.
(a) Describe what happens when each of the following molecules is separately dissolved in water and illustrate with an equation in each case:
ethanoic acid (CH3COOH)
ammonia (NH3)
(b) Identify the conjugate acids and bases in the substances mentioned in question 7(a) above.
(c) Explain the difference between: (i) a strong acid and weak acid and (ii) a strong base and a weak base
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