WGU D425 Chemistry Study Questions
and Answers
2026/2027
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, Heterogeneous mixture Examples include salad dressing, chex mix, rocks,
salad, chicken noodle soup
Oxidizing agent Are being reduced because they accept
electrons
Reducing agents Are being oxidized because they donate
electrons
Reduction The process of gaining electrons
Electrolyte A substance that dissociates into ions in solution
Unsaturated solution A solution that has not yet reached its maximum
solubility
Mixture A combination of two or more substances that
retain their individual properties
Molar mass of Na The mass of one mole of sodium, approximately
22.99 g/mol
How is energy transferred? potential and kinetic energy, heat and work
Oxidation gain of protons, increase in oxidation number,
energy of motion, loss of electrons