NH+4 and NH3 are and acid=base conjugate pair. How many moles of NH4Cl must be added to 2.0 L of a 0.10M NH3 to form a buffer with a pH= 9.00? NH3 (aq) + H2O(l) ⇌NH+4(aq) + OH−(aq)    Kb =1.8x 10−5  =[NH+4][OH−]/[NH3]       a)  18. mol   b)  36.0 mol   c)  2.7 mol   d)  0.36 mol

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Q: pH

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.