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Acid-base calculations

1.) Calculate the four values of pH, pOH, [H+], and [OH-] for a 0.100 M of HCl.
2.) Calculate the four values of pH, pOH, [H+], and [OH-] for a 0.00250 M NaOH solution.
3.) Calculate the four values of pH, pOH, [H+], and [OH-] fo a 0.00150 solution of nitric acid (HNO3).
4.) The Ka of HCl is known to be about 10^7. What is the [HCl] of a 1.00 M solution.
5.) Acetic acid has a ka= 1.78x10^(-5). Determine the pHof a 0.100 M solution.
6..) Calculate the hydronium ion ([H30+)] concentration of a 0.25 M solution of benzoic acid, HC7H5O2, Ka= 6.46x10^(-5).

Solution Preview

1.) Calculate the four values of pH, pOH, [H+], and [OH-] for a 0.100 M of HCl.

The [H+] of a strong acid is equal to the concentration of the acid.
[H+] of 0.100 M of HCl = 0.100
pH of 0.100 M HCl = - log (0.100) = 1.00
pH + pOH = 14.0
pOH = 14 - 1.00 = 13.0
pOH = -log [OH-]
13.0 = -log [OH-]
[OH-] = 9.99 x 10^-14

2.) Calculate the four values of pH, pOH, [H+], and [OH-] for a 0.00250 M NaOH solution.

The [OH-] of a strong base is equal to the concentration of the base.
[OH-] ...

Solution Summary

Calculating pH, pOH, [H+], [OH-]

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