Question

in a science lab, cash mixes two clear liquids together in a beaker. bubbles are produced, and a white solid forms and settles to the bottom. he plans to heat the beaker over low heat and make more observations.
which statement is most likely correct?
a physical change occurred, so if cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
a physical change occurred, so even if cash heats it, the white solid will remain.
a chemical change occurred, so if cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
a chemical change occurred, so even if cash heats it, the white solid will remain.

Explanation:

When two clear liquids are mixed and bubbles (gas production) and a white solid (precipitate) form, a chemical change has occurred. Chemical changes result in the formation of new substances. Heating will not reverse a chemical change to reform the original substances. Physical changes, like melting or dissolving, do not form new substances. Since a new substance (the white solid) was formed (a chemical change), heating will not turn it back into the original liquids.

Answer:

A chemical change occurred, so even if Cash heats it, the white solid will remain.