A student takes four samples of a white crystalline solid and places each in a well plate. On top of each sample, she carefully
places 20 drops of clear mystery liquids A, B, C and D. Her results for each well are: Liquid A: The solid dissolves quickly.
Liquid B: The solid appears unchanged.
Liquid C: A brownish colored liquid is produced.
Liquid D: Fizzing occurs and the well becomes warmer.
