Question

Use the acidity model pH=-log10 [H+], where acidity (pH) is a measure of the hydrogeon ion concentration [H+] (measured in Miles of hydrogen per liter) of a solution.

Connie the hydrogen ion concentration of a solution that has a pH of 4.3 (Enter your answer in scientific notacion. Round the decimal Value to one decimal place)
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Answer 1

5.0×10^5 M

Explanation:

Since we have defined pH as the negative logarithm of hydrogen ion concentration. This implies that mathematically we can write;

pH= -log[H^+] of course, log here is the same as log10(logarithm to base 10).

Hence I can rewrite the definition of pH above as the negative logarithm to base 10 of hydrogen (or oxonium) ion concentration.

Since

pH= -log[H^+]

It follows that;

[H^+]= Antilog (-pH)

Hence if the pH of the solution has been given as 4.3

[H^+] = Antilog(-4.3)

[H^+] = 5.0×10^5 M