The major product of this reaction exists as two stereoisomers. Draw both isomers. Show all hydrogen atoms in the structures. Use wedge-and-dash bonds to indicate the stereochemistry.

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?