Question

Now try these practice problems. Calculate the H+concentration for each pH listed below. Type your answer into the field provided. *Entering e-notation so your answer will be in this format: 3.98e−7 (instead of 0.000000398 ) is encouraged but not required. 

pH=4.30 
_________
pH=8.83
_________
pH=11.50
_________

Answer 1

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