The pH of solution A is 6 and the pH of solution B is 8. Which of the following solutions has more $H^{+}$ ion concentration?

Solution A having ph 6 has more $H^{+}$ion concentration.
A pH scale is used to measure the strength of basic and acidic properties of compounds. It is scaled from 1 to 14, with 1 being the most acidic and 14 being the most basic. A higher concentration of $H^{+}$ions makes a solution more acidic and that shows a lower value on the pH scale. So, solution A with pH 6 is more acidic with a higher concentration of $H^{+}$ ions than solution B.