Question

You have two solutions, A and B. The pH of solution A is $6$ and the pH of solution B is $8$. Which solution has more hydrogen ion concentration? Which of these is acidic and which one is basic?

Answer 1

pH: pH, originally standing for "potential of hydrogen," is a chemical scale used to describe the acidity or alkalinity of an aqueous phase.

• $\mathrm{pH}=-\log \left[{\mathrm{H}}^{+}\right]$

• A solution's pH ranges from $0to14$.
• ${25}^{°}\text{C}$ is the temperature at which the pH range works.
• Acidic solutions have a pH value ranging from $0to7$ on the pH scale.
• Basic solutions have pH values ranging from $7to14$ on the pH scale.
• Neutral solutions are those that have a pH value of $7$ on the pH scale.

Solution A :

• $pH=6$
• To determine the concentration of ${\mathrm{H}}^{+}$ ions, apply the rule that the pH of any solution is inversely proportional to its ${\mathrm{H}}^{+}$ concentration. So ${\mathrm{H}}^{+}$ ions in Solution A have more concentration.
• Since the pH of Solution A is less than $7$, so it is acidic.

Solution B :

• $pH=8$
• To determine the concentration of ${\mathrm{H}}^{+}$ ions, apply the rule that the pH of any solution is inversely proportional to its ${\mathrm{H}}^{+}$ concentration. So ${\mathrm{H}}^{+}$ ions in Solution B have less concentration.
• Since the pH of Solution B is more than $7$, so it is basic.