Opal adds 25 grams of salt to a one-liter glass beaker filled up to its volume mark with pure water. she stirs the water until the salt crystals disappear. she shows the beaker to teddy and tells him what she did. then, she challenges him to make a correct statement about the beaker's contents. which one of the four choices below is not correct? a. it is a homogeneous mixture b. it is a solution c. water is the solvent and salt is the solute d. a chemical change has occurred