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1. |
Ammonia nitrogen is present in a given wastewater sample as the ammonium ion (NH4+) and ammonia (NH3). If pH is the only deciding factor for the proportion of these two constituents, which of the following is a correct statement? |
A. | At pH 7.0, NH4+ will be predominant. |
B. | At pH below 9.25, NH3 will be predominant. |
C. | At pH below 7.0 NH4+ and NH3 will be found in equal measures |
D. | At pH 9.25, only NH4+ will be present |
Answer» B. At pH below 9.25, NH3 will be predominant. | |