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Illustrated Guide to Home Biology Experiments by Barbara Barbara Fritchman Thompson Thompson, Robert Robert Bruce Thompson Thompson

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Chapter 18. Investigating Osmosis

Equipment and Materials

You’ll need the following items to complete this lab session. (The standard kit for this book, available from www.thehomescientist.com, includes the items listed in the first group.)

Materials from Kit

  • None

Materials You Provide

  • Gloves

  • Balance

  • Eggs, uncooked (2)

  • Foam cups

  • Graph paper, calculator, or software

  • Marking pen

  • Paper towels

  • Syrup (corn, maple, pancake, waffle, etc.)

  • Tablespoons, plastic or metal (2)

  • Vinegar, distilled white

  • Watch or clock with second hand

Background

In this lab session we’ll investigate osmosis, the diffusion of water across a semipermeable membrane to equalize solute concentrations on both sides of the membrane. A semipermeable membrane allows the free passage of small molecules ...

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