Mississippi Science CHE.8.1
The Standard
- CHE.8
- Students will demonstrate an understanding of the nature of properties of various types of chemical solutions.
Use mathematical and computational analysis to quantitatively express the concentration of solutions using concepts such as molarity, percent by mass, and dilution.
2026 Mississippi College- and Career-Readiness Standards for Science · Solutions
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students calculate molarity from moles of solute and liters of solution. They calculate mass percent from solute mass and total solution mass, then use concentration and volume to plan a dilution.
What Mastery Looks Like
- A student converts milliliters to liters before calculating molarity and uses the whole solution mass for mass percent. They calculate a dilution and check that adding water lowers the concentration.
Common Misconceptions
- Students may divide by the mass of the water instead of the whole solution when finding mass percent. They may use milliliters as liters or think adding water changes the amount of solute.
How to Assess It
- Exit ticket: Dissolve 0.20 mol of NaCl (11.7 g) in water to make 500 mL of solution weighing 520 g. Find its molarity and mass percent, then find its new molarity after diluting 100 mL to 250 mL.
Lesson moves
Ways to Teach It
Give pairs 10 g sugar, 90 g water, and a balance; have them mix the solution and calculate its sugar mass percent.
Have students draw particle sketches before and after adding water, then write why molarity changes while solute moles stay constant.
Post six cards with molarity, mass percent, and dilution problems; pairs rotate, solve each card, and check answers against a key.
Use a sports drink label showing sugar grams per serving; students weigh one serving and calculate its sugar mass percent.
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Printable CHE.8.1 Worksheet
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Related Standards
- P.5.5B.2
Analyze and interpret data to communicate that the concentration of a solution is determined by the relative amount of solute versus solvent in various mixtures...
- CHE.8.5
Use mathematical and computational analysis to analyze molarity, molality, dilution, and percentage dilution problems.
- CHE.8.7
Use mathematical and computational analysis to predict the results of reactions using the concentration of solutions (i.e., solution stoichiometry).
- CHE.6.6
Use mathematics and computational analysis to support the concept of percent yield and limiting reagent.
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