Tijuan mixed a solid and a liquid together in a beaker. He determined that a chemical change occurred. If his conclusion is correct, which substances could he have been observing and why?
Answer
A
sand mixed into water, because when sand was added the mass of the beaker increased
B
sugar mixed into hot water, because the disappearance of solid indicates that the chemical identity of the sugar changed
C
ice mixed into warm oil, because the change of state that occurred when the ice melted cannot be reversed
D
baking soda mixed into vinegar, because the production of bubbles indicates that a new substance formed