...Calcium Carbonate Titration Ashwin Rao Ms. Farrow SCH 3U1 Calcium Carbonate Titration Ashwin Rao Ms. Farrow SCH 3U1 Purpose To measure the percent by mass of CaCO3 in an eggshell. Safety Precautions * Wear safety glasses. * Tie back long hair. * Roll up sleeves and/or do not wear baggy or loose clothing. * If any glass is broken, do not pick it up with bare hands. * Sweep the glass into a dustpan and place in broken glass bucket. * Be careful when pouring acid or base. * If any is spilled on hands, wash thoroughly with soap and water. Materials * * Safety glasses * Tap water * Masking tape * Precision scale * Pen/pencil & paper * Egg * Buret * Buret clamp * Retort stand * 3 Erlenmeyer flasks * 10 mL graduated cylinder * Wash bottle * Distilled water * 3 Beakers * 250 mL beaker for base * 100 mL beaker for acid * 500 mL beaker for waste * Ethanol * Phenolphthalein * Sodium Hydroxide (NaOH) * Hydrochloric Acid (HCl) * Hot plate * Hot hands * Scoopula * Break the egg, and get rid of the yolk and egg whites into a large beaker. Break the egg, and get rid of the yolk and egg whites into a large beaker. Wash the shell with tap water and peel off the membranes with your fingers. Wash the shell with tap water and peel off the membranes with your fingers. Pat dry with paper towel and allow the shells to dry for a few...
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