The higher the hydronium ion concentration of a solution, the its ph.

higher or lower

The higher the hydronium ion concentration of a solution, the lower its pH.

Explanation:The pH is the measure of acidity or alkalinity of a substance.We calculate pH by using;

                  pH = -log[H+]

The lower the pH of a solution the more acidic it is and the higher the pH the more basic or alkaline it is. pH =-log[H+] =-log[H₃O+]From this relationship, the higher the hydronium ions concentration of a solution the lower the pH and the more acidic a solution is.

For example,

Solution A with a [H₃O+] of 0.003 M will have a pH of

pH = -log 0.003 M

     = 2.52

While, a solution B with a [H₃O+] of 0.025 M will have a pH of

pH = -log 0.25 M

    = 1.60

Therefore, the higher the concentration of hydronium ion of a solution the lower its pH is.

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