AP EAMCET2004ChemistryIonic Equilibrium
Study the following table: array c|c|c array c Buffer Solution array & array c Volume (in mL ) of 0.M Weak acid array & array c Volume (in mL ) of 0.1 M sodium salt of weak acid array I. & 4.0 & 4.0 II. & 4.0 & 40.0 III. & 40.0 & 4.0 IV. & 0.1 & 10.0 array Which of the two sets of butter solutions have least pH ?
Options
- AI and II
- BI and III
- CII and III
- DII and IV
Correct answer
B. I and III
Step-by-step solution
For a buffer solution, pH is given by Henderson, equation, pH = pKa + [ salt ] [ acid ] Hence, pH is least when concentration of acid is higher than that of salt.