A Buffer Was Prepared by Adding 2

question 75

Multiple Choice

A buffer was prepared by adding 2.4 g of ammonium nitrate to 100.0 mL of 0.30 M aqueous ammonia (K_b = 1.8 × 10^-5) .To this solution was then added 10.0 mL of 0.30 M aqueous sodium hydroxide,which caused a pH change of ________.

• A)3.0 pH units
• B)0.30 pH units
• C)0.90 pH units
• D)0.09 pH units
• E)zero

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