Calculate the pH of a buffer solution contain | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The solution containing $0.04 \ M$ $NaF$ (salt) and $0.02 \ M$ $HF$ (weak acid) forms an acidic buffer.Using the Henderson-Hasselbalch equation:$p

Vedclass · Accepted Answer

$3.4$

Vedclass · Answer

(B) The solution containing $0.04 \ M$ $NaF$ (salt) and $0.02 \ M$ $HF$ (weak acid) forms an acidic buffer.Using the Henderson-Hasselbalch equation:$pH = pK_a + \log_{10} \frac{[Salt]}{[Acid]}$Substituting the given values:$pH = 3.142 + \log_{10} \frac{0.04}{0.02}$$pH = 3.142 + \log_{10}(2)$Since $\log_{10}(2) \approx 0.3010$:$pH = 3.142 + 0.3010 = 3.443$Rounding to one decimal place,we get $pH \approx 3.4$.

Calculate the $pH$ of a buffer solution containing $0.04 \ M$ $NaF$ and $0.02 \ M$ $HF$ $[pK_a = 3.142]$.

Similar Questions

Out of the following,which pair of solutions is not a buffer solution?

The $pH$ of blood in the human body is maintained by $CO_2$ and $H_2CO_3$. What is this process called?

Equal volumes of $0.5 \ N$ acetic acid and $0.5 \ N$ sodium acetate are mixed. What is the $pH$ of the resultant solution? $(pK_{a}$ of acetic acid $= 4.75)$

Which of the following cannot act as a buffer solution?

In a buffer solution,the ratio of $NH_4Cl$ to $NH_4OH$ is $1:1$. If this ratio is changed to $2:1$,the $pH$ value of the buffer will ...

Vedclass Test Series

Exam Paper Generator

Online Exam Module