मराठी

Assertion (A): Aqueous solution of ammonium carbonate is basic. Reason (R): Acidic/basic nature of a salt solution of a salt of weak acid and weak base depends on Ka and Kb value of the acid and - Chemistry

Advertisements
Advertisements

प्रश्न

Assertion (A): Aqueous solution of ammonium carbonate is basic.

Reason (R): Acidic/basic nature of a salt solution of a salt of weak acid and weak base depends on Ka and Kb value of the acid and the base forming it.

पर्याय

  • Both A and R are true and R is correct explanation of A.

  • Both A and R are true but R is not correct explanation of A.

  • A is true but R is false.

  • Both A and R are false.

MCQ

उत्तर

Both A and R are true and R is correct explanation of A.

Explanation:

Ka and Kb values are responsible for acidic and basic characters of substances.

shaalaa.com
Ionization of Acids and Bases - Ionization of Weak Bases
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Equilibrium - Multiple Choice Questions (Type - I) [पृष्ठ ९५]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry [English] Class 11
पाठ 7 Equilibrium
Multiple Choice Questions (Type - I) | Q 48 | पृष्ठ ९५

संबंधित प्रश्‍न

Calculate the degree of ionization of 0.05M acetic acid if its pKa value is 4.74.

How is the degree of dissociation affected when its solution also contains

  1. 0.01 M
  2. 0.1 M in HCl?

The ionization constant of dimethylamine is 5.4 × 10–4. Calculate its degree of ionization in its 0.02 M solution. What percentage of dimethylamine is ionized if the solution is also 0.1 M in NaOH?


Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:

Human muscle-fluid, 6.83


Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:

Human stomach fluid, 1.2


Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below:

Human blood, 7.38


A 0.02 M solution of pyridinium hydrochloride has pH = 3.44. Calculate the ionization constant of pyridine.


\[\ce{K_a}\] for \[\ce{CH3COOH}\] is 1.8 × 10–5 and \[\ce{K_b}\] for \[\ce{NH4OH}\] is 1.8 × 10–5 . The \[\ce{pH}\] of ammonium acetate will be ______.


Ionisation constant of a weak base MOH, is given by the expression

`K_b = ([M^+][OH^-])/([MOH])`

Values of ionisation constant of some weak bases at a particular temperature are given below:

Base Dimethylamine Urea Pyridine Ammonia
\[\ce{K_b}\] 5.4 × 10–4 1.3 × 10–14 1.77 × 10–9 1.77 × 10–5

Arrange the bases in decreasing order of the extent of their ionisation at equilibrium. Which of the above base is the strongest?


Conjugate acid of a weak base is always stronger. What will be the decreasing order of basic strength of the following conjugate bases?

\[\ce{OH-, RO-, CH3COO-, Cl-}\]


Its solution in water will be basic.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×