Calculate the pH of a buffer solution that is .75M NH3 and .45M NH4Cl

Use the Henderson-Hasselbalch equation. pKb NH3= 4.75

Please show all work!! Thanks a bunch! :D

pOH= pKb+lg([NH4(+)]/[NH3])
= 4.75+lg(0.45/0.75)
= 4.53

pH= 14-pOH
= 9.47

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