Astudent mixes two clear liquids together. after a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. which of the following is a conclusion that the student can draw based on these observations? question 12 options: the two liquids have gone through a chemical change in which a new substance called a precipitate was produced. the two liquids were pure substances before they were mixed. the two liquids are toxic and should be handled with extreme caution. the two liquids have been stored too long and are no longer good.