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If pH is the value of hydronium ion concentration in a solution, then why do we say that a pH value above 7 indicates basic solutions?
I have a question about pH values. If pH is the value of hydronium ion concentration in a solution, then why do we say that a pH value above 7 indicates basic solutions?
That's a good question. The reason is that pH is measured on a logarithmic scale, which means that a small change in pH represents a large change in hydronium ion concentration. A pH of 7 is considered neutral because it represents an equal concentration of hydronium and hydroxide ions. A pH above 7 indicates a higher concentration of hydroxide ions, which are characteristic of basic solutions.