Question

The pH values of 4 solutions P Q R and S are 7.8, 1.0, 13.0 and 1.4 respectively. the solution having the highest hydrogen ion concentration among them is
A. P
B. Q
C. R
D. S.

Answer 1

Answer:

option Q

Explanation:

because it has highest number

Answer 2

Answer:

The Correct answer is option B

Explanation:

Given: pH values of 4 solutions P Q R and S

To find: The solution having the highest hydrogen ion concentration

Solution:

$\mathrm{pH} \uparrow \quad\left[\mathrm{H}^{+}\right]_{\text {conc. }} \downarrow$

$\left[\mathrm{H}^{+}\right]_{\text {conc. }} \uparrow \quad Acid Strength \uparrow$

$\mathrm{Q} \rightarrow$ Acidic Q has high hydrogen ion concentration because it has low pH and it is very acidic. Hence it has more hydrogen ion concentration

$P \rightarrow$ Weakly Acidic

$R \rightarrow$ Strongly Acidic

$S \rightarrow$ Weakly Alkaline

Strongly Alkaline

So, $\left[\mathrm{H}^{+}\right]_{\text {conc. }}$ is $\mathrm{Q} > \mathrm{S} > \mathrm{P} > \mathrm{R}$