A buffer is made from a weak acid with and its salt, with . What is its pH?
Answer and explanation
Correct answer: A. 5.76
- Step 1: Henderson-Hasselbalch: . Step 2. . Answer: 5.76. Why not the others: 3.76 subtracts the log; 4.76 uses a ratio of 1; 6.76 uses a ratio of 100.
Practise more Equilibrium, Acids, Electrochemistry and Organic Chemistry.
Free questions with an explanation for every one, and full timed Wazari Exam (Iraq Baccalaureate) - Scientific Branch mock tests.
More Equilibrium, Acids, Electrochemistry and Organic Chemistry questions
- What is the pH of a 0.01 mol/L solution of hydrochloric acid?
- What is the pH of a 0.001 mol/L solution of sodium hydroxide at 25 degrees C?
- Which expression gives for ?
- The equilibrium is exothermic in the forward direction. What happens when the temperature is raised?
- How many moles are in 11 g of carbon dioxide ( g/mol)?
- 4 g of sodium hydroxide ( g/mol) is dissolved to make 500 mL of solution. What is the concentration?