Question

Why is it difficult to classify dissolving as simply a physical or a chemical change?(1 point)ResponsesSome substances taste the same after they dissolve, and others do not.Some substances taste the same after they dissolve, and others do not.Some substances keep the same color when they dissolve, and others do not.Some substances keep the same color when they dissolve, and others do not.Some substances keep the same molecular structure when they break down, and others do not.Some substances keep the same molecular structure when they break down, and others do not.Some substances release energy when they dissolve, and some absorb energy.

Answer 1

It is difficult to classify dissolving as simply a physical or a chemical change because some substances keep the same molecular structure when they dissolve, while others do not. In a physical change, the substance typically retains its chemical identity and can be recovered in its original form, as seen with many solutes in a solution. However, for some substances, dissolving can involve a chemical interaction that alters their molecular structure. Additionally, the energy changes (e.g., whether a process is exothermic or endothermic) can vary widely for different solutes, further complicating the classification.