Question

Middle school science help please

Answer 1

Hydrogen ions are represented by H+.

Step-by-step explanation:

• Hydrogen ions usually decreases the pH value when added to a solution.
• Hydrogen ions are contributed to a solution by a acid.

Answer 2

The answer is 'All of the above'

Step-by-step explanation:

because the hydrogen ions are represented by the symbol H+, they increase the PH value of a solution if less amount is added but they decrease the PH value of a solution if a larger amount of hydrogen ions are added but still they increase the PH value, and of course, they contribute to a solution by a base.