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How would you Calculate the H3O ion concentration in a solution with pH3 and a solution with pH8?

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In a solution, hydrogen ions normally bond with molecules of water, forming H3O+ (hydronium) ions. Thus, the concentration of the hydronium ions will be the same as the concentration of hydrogen ions, which is related to the pH of a solution according to the following equation:

pH = -log[H+] = -log[H3O+]

This equation can be solved for the concentration of hydronium ions:

[H3O+] = 10-pH

Thus, for a solution with a pH of 3, the concentration of hydronium ions will be 10-3 = 0.001 moles/liter, and for a solution with a pH of 8, the concentration of hydronium ions will be 10-8 = 0.00000001 moles/liter.
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How do you calculate the H3O ion concentration in a solution with pH3 and ina solution with pH8?

pH is defined as the negative logarithm of the Hydronium ion concentration. Therefore, the concentration of Hydronium in a pH 3 solution is found in the following way. -Log(x)

What would its new pH be if the concentration of H3O plus ions in the solution were increased by 100 times and why?

Going from right to left, each number on the ph scale represents a 10 fold increase in the concentration of H3O+ ions. For example, water has a ph of 7. Urine has 10 times mo