BASES Arrhenius defined a base as any compound that dissolves in water and yields a hydroxide ion.

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Presentation transcript:

BASES Arrhenius defined a base as any compound that dissolves in water and yields a hydroxide ion.

Examples you may be familiar with? Lye is sodium hydroxide, NaOH. Potash is potassium hydroxide, KOH Milk of Magnesia is magnesium hydroxide, Mg(OH) 2 Slaked Lime is calcium hydroxide, Ca(OH) 2 Ammonia water is ammonium hydroxide, NH 4 OH

Properties of Bases Bases are electrolytes. In other words, their solutions conduct electricity. Bases cause indicators to turn colors, more about this in unit 2. Bases neutralize acids to produce a salt and water.

Properties of Bases Aqueous solutions of bases taste bitter and feel slippery. Never taste laboratory bases. Bases emulsify (help break down) fats and oils. Ammonia and lye are good cleaners because they can break down grease.