Question

during a lab experiment, students were asked to dilute some hydrochloric acid. what would be the best procedure for diluting the acid? pour water slowly against a glass stirring rod into the acid beaker. pour water directly into the acid beaker. pour acid directly into the water beaker. pour acid slowly against a glass stirring rod into the water beaker

Explanation:

When diluting strong acids like hydrochloric acid, the correct procedure is to add the acid to water (not water to acid) slowly while stirring. This is because adding water to acid can cause a violent, exothermic reaction (releasing a lot of heat) that may splash the corrosive acid. Adding acid to water, while stirring, allows the heat to be dissipated safely. So the best procedure is to pour the acid slowly against a glass stirring rod into the water beaker.

Answer:

D. Pour acid slowly against a glass stirring rod into the water beaker