A chemistry teacher adds red food coloring to water and students observed the dye spreading out to fill the container. Is the teacher demonstrating a physical or chemical change?

its obviously a chemical change

Explanation: Facts

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

answer; i believe that the correct answer is (a) potassium(k)