Answer:
pH =3.45=-log [H3O+]
-3.45 log = [H3O+]
anti log -3.45 = 3.55 X10^-4
Explanation:
Considering the definition of pH, the concentration [H⁺] is 3.55×10⁻⁴ M.
First of all, it is necessary to know that pH is a measure of the degree of acidity or alkalinity of a substance or solution that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is the logarithm of the H + ion concentration, with the sign changed:
pH= - log [H⁺]
pH is measured on a scale of 0 to 14. On this scale, a pH value of 7 is neutral, which means that the substance or solution is neither acidic nor alkaline. A pH value of less than 7 means that it is more acidic, and a pH value of more than 7 means that it is more alkaline.
In this case, being pH= 3.45, you can replace this value in the definition of pH:
3.45= -log [H⁺]
Solving:
[H⁺]= 10⁻³ ⁴⁵ M
[H⁺]= 3.55×10⁻⁴ M
Finally, the concentration [H⁺] is 3.55×10⁻⁴ M.
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