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A 100 mL of buffer solution contains 0.100 M in NH3 (aq) and 0.100 M in...

A 100 mL of buffer solution contains 0.100 M in NH3 (aq) and 0.100 M in NH4Cl. (Q7 ‒ Q9)

7. Calculate pH of the buffer solution.

8. Calculate the change of pH when 4.00 mL of 0.100 M HCl (aq) is added to the buffer solution.

9. Calculate the pH of the solution when 4.00 mL of 0.100 M NaOH is added to the original buffer solution.

Please show steps and explain so I can understand how. thank you

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