Question

when working with acids, always ____ to avoid chemical splattering.
∘add water acid
∘add acid to water

Explanation:

When mixing acid and water, adding acid to water is safe. Adding water to acid causes a violent reaction (due to acid's density and heat release), leading to splattering. So the correct method is adding acid to water.

Answer:

B. add acid to water (Note: Assuming the options are labeled, with the second option being "add acid to water" as the correct one. If labels were different, adjust accordingly, but based on chemistry safety, "add acid to water" is correct.)