| Cheers! Turn Water into Wine, Milk, and Beer
| SCH3U – Solutions and Solubility
| Overall Expectations:E3. Demonstrate an understanding of qualitative and quantitative properties of solutions.Specific Expectations: E2.1 Use appropriate terminology related to aqueous solutions and solubility, including but not limited to: concentration, solubility, precipitate, ionization, dissociation, pH, dilute, solute, and solvent.E3.1 Describe the properties of water (e.g., polarity, hydrogen bonding), and explain why these properties make water such a good solvent.
| Introduction and Background
| The demonstration illustrates the electronegativity and polarity of water molecules. It displays the strength of intermolecular forces vs. the strength of water’s electronegativity and how that determines solubility of ionic compounds. This demonstration is beneficial to use in both the Solution and Solubility, and Chemical Reactions units.
| distilled water – saturated sodium bicarbonate (NaHCO3) – 20% sodium carbonate solution (Na2CO3) - phenolphthalein indicator – saturated barium chloride (BaCl2) – sodium dichromate crystals – concentrated hydrochloric acid – water glass – wine glass – milk glass – beer mug
| All chemicals must be handled carefully and with respect. The solids and liquids used in this inquiry are safe for you to use with the following precautions: *
It is recommended that safety glasses be worn. *
Acids and Bases are caustic in high concentration; therefore, concentrations being used should be diluted unless otherwise stated. *
If spilled on skin or clothing, rinse with running water. *
Ensure to wash hands and instruments thoroughly when finished. *
Once used, mark the drinking glasses so they will be identified as Chemistry Use Only. *
Use caution with the conc. HCl, which can cause a serious acid burn.
| Preparation: (The following steps should be...
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