Question

In: Chemistry

What is the pH when 125 mL of 0.1 M NaOH is added to 175 mL...

What is the pH when 125 mL of 0.1 M NaOH is added to 175 mL of 0.2 M CH3COOH (acetic acid) if pKa for acetic acid = 4.76?

Solutions

Expert Solution

Number of moles of NaOH = 125/1000 * 0.1M = 12.5m moles

Number of moles of CH3COOh = 175/1000 * 0.2M = 35m moles

                             

Initial                           12.5m                        35m                                   0                              0

Final                              0                            22.5m                                12.5m                   

Hence the final pH will be equal to 4.504


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