Photo de stock - A high school teacher in San Clemente, CA, assists her students with a solution chemistry experiment in freezing point depression by adding an electrolyte solute to a solvent. The result will be ice cream. Note round ice container containing cream plus safety goggles.

Photo de stock: A high school teacher in San Clemente, CA, assists her students with a solution chemistry experiment in freezing point depression by adding an electrolyte.

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