Unit 6 Standards Review

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Solution Chemistry



  1. are homogenous mixtures of two or more substances.
  2. Students know the definitions of solute and solvent.

    • The substance that gets dissolved in a solution is the
    • The substance that does the dissolving in a solution is the
    • In a solution of sugar and water, is the solvent and is the solute

  3. Students know how to describe the dissolving process at the molecular level by using the concept of molecular motion.
  4. Students know temperature, pressure, and surface area affect the dissolving process.

    • Gases become more soluble in liquids at the temperature and the pressure
    • Solids tend to become more soluble in liquids as the surface area and the temperature

  5. Students know how to calculate the concentration of a solute in terms of grams per liter, molarity, parts per million, and percent composition.

    • When 40 grams of NaOH is dissolved in 500 mL of solution, the concentration in grams per liter is grams per liter.
    • When 40 grams of NaOH is dissolved in 500 mL of solution, the molarity is moles per liter.
    • When 40 grams of NaOH is dissolved in 500 mL of solution, the percent composition is percent
    • When 40 grams of NaOH is dissolved in 500 mL of solution, the concentration in parts per million is ppm.

  6. Students know the observable properties of acids, bases, and salt solutions.

    • taste bitter
    • turn red litmus to a blue color
    • react with carbonates to form CO2
    • turn phenolphthalein pink
    • taste sour
    • react with metals to produce hydrogen
    • turn blue litmus to a red color
    • are hydrogen ion (H+) acceptors
    • Hydrogen ion (H+) donors
    • Solutions of Feel slippery
    • contribute hydrogen ions in solution
    • contribute hydroxide ions in solution
    • Students know acids are hydrogen-ion- and bases are hydrogen-ion- substances.
    • Students know strong acids and bases dissociate and weak acids and bases dissociate.
    • Students know how to use the pH scale to characterize acid and base solutions.

      • have a pH greater than 7

        • A with a pH of 13 would be than a with a pH of 9

      • have a pH less than 7

        • An with a pH of 5 would be than an with a pH of 2