Answer :
The answer is true. Ammonium chloride and ammonia are commonly used to make a buffer with a pH range of 7.9-8.3.
Ammonium chloride is an acidic salt that dissociates in water to form ammonium ions (NH4+) and chloride ions (Cl-). Ammonia is a weak base that accepts hydrogen ions (H+) from water to form ammonium ions (NH4+) and hydroxide ions (OH-). When ammonium chloride and ammonia are mixed together, the ammonium ions act as an acid and the ammonia molecules act as a base, resulting in a solution that resists changes in pH. This buffer solution is commonly used in biological and chemical experiments that require a stable pH environment.
In this scenario, Spike was assigned BC and was instructed to combine 8.00 mL of ammonium chloride and 4.00 mL of ammonia to make his buffer. By combining these two solutions, Spike will create a buffer with a pH within the desired range of 7.9-8.3, which will enable him to maintain a stable environment for his experiment. Therefore, the answer is true.
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