Calculate the pH of a buffer solution containing 0.35 M weak acid and 0.70 M of its salt with strong base if pK _ a is 4.56 .

Step-by-step solution

For an acidic buffer, aligned pH & = pK _ a + ₁₀ [ salt ] [ acid ] pH & =4.56+ ₁₀ 0.70 0.35 & =4.56+ ₁₀ 2=4.56+0.3010 & =4.861 aligned