Answer:
The H+ concentration for pH 4.30 is 0.000050119, pH 8.83 is 0.0000000014791 and for pH 11.50 is 0.000000000003162
Explanation: The pH can be calculated by the formula,
pH = - log ([H+])
Acid is a substance that produces H+ ions in a solution. The base is a substance that produces OH- ions in solution. If hydrogen ions H+ outnumber hydroxide ions OH-, the solution is acidic.
to calculate the concentration of H+ ions from pH we can twist the formula like this,
[H+] = 10 ^ -pH (10 raised to the power -pH)
so, the required answers are, pH 4.30= 5.0119e-5
pH 8.83= 1.4791e-9
pH 11.50= 3.162e-12