Which set of solute will form a buffer when dissolved in water to make 1 liter of solution?
Correct answer: D. 4 moles of CH3COOH with 4 mole of NaCl
- A. 1 mole of NH3 with 2 moles of HCl
- B. 0.0002 mole of HCl
- C. 2 moles of NaCl with 2 mole of HCl
- D. 4 moles of CH3COOH with 4 mole of NaCl
Explanation
A buffer solution is typically made from a weak acid and its conjugate base, or a weak base and its conjugate acid. Option D is the correct answer because it includes acetic acid (CH3COOH), a weak acid, and the sodium ion from NaCl. The CH3COO- ion acts as the conjugate base, forming an effective buffer. Options A, B, and C do not have the necessary components to form a buffer system: Option A is an acidic solution, Option B is a dilute acid, and Option C is a combination of a strong acid and a salt, none of which can resist pH changes effectively.
Last updated
Related questions
0.1 M HCl has pH = 1.0, it is about 100 times stronger than nitric acid. Then pH of acetic acid will be
1.0 M solution of NaOH is mixed with 1.0 M solution of H₂SO₄+ the solution formed is:
100 ml of each of 0.5 N NaOH, N/5 HCl and N/10 H2SO4 are mixed together. The resulting solution will be:
100 ml of N/5 NaOH will neutralize:
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35ml. The molarity of barium hydroxide solution was: