# A buffer solution made with NH_3 and NH_4Cl has a pH of 10.0 which procedure could be used to lower the pH ? 1.Adding HCl , 2.Adding NH_3 , 3. A

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A buffer solution made with NH_3 and NH_4Cl has a pH of 10.0 which procedure could be used to lower the pH ?
1.Adding HCl , 2.Adding NH_3 , 3. Adding NH_4Cl
A. 1 only
B. 2 only
C. 1 and 3 only
D. 2 and 3 only

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