Praxis 5511 Practice Test Practice Question
When an acid is added to a base in water, which of the following happens?
Correct Answer: A
Rationale: When an acid is added to a base in water, the pH of the solution changes due to the neutralization reaction, where hydrogen ions from the acid combine with hydroxide ions from the base to form water. This shift in ion concentration directly affects the pH level.
Option B is incorrect; while some reactions may be exothermic, they do not universally result in a cooler solution. Option C is misleading; explosions are rare and typically only occur under specific conditions, not in standard acid-base reactions. Option D is also incorrect, as solid formation is not a guaranteed outcome; many reactions result in a clear solution rather than precipitate.
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