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Item #: PF2047 

Price: $45.00

In this lab experience, students will investigate the identity of an unknown group 1 metal carbonate through titration. This will give them insight into how scientists can learn the identity of unknown substances. Students should become comfortable with stoichiometry calculations and how that information can be useful in determining the unknown identities of different compounds. Both techniques used in this lab help students understand the importance in being precise and accurate when making measurements. When using the mass loss of carbon dioxide to determine the identity, the outcome is heavily dependent on careful measurements. The mass of CO2 lost is small and can be obscured by poor measurements. With titrations there needs to be care in not overshooting the endpoint, as that can lead to inaccurate calculations that could in turn affect the identification of the unknown metal carbonate.

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Product Details

Safety: Before conducting the lab, review with the class the safety precautions on the student page. Then discuss any safety precautions that are specific to your science laboratory or classroom.

Materials Included in Kit

Bromocresol green indicator solution, 0.04%, 35 mL
Hydrochloric acid solution, 0.1 M, 1 L
Hydrochloric acid solution, 2 M, 500 mL
Potassium carbonate, 60 g
Sodium carbonate, 60 g
Weighing dishes, 50

Additional Materials Required
Beakers, Borosilicate Glass, 50-mL, 10
Beaker Tongs with protective sleeves, 10
Buret, Borosilicate Glass, with Glass Stopcock, 50-mL, 10
Flinn Scientific Electronic Balance, 300 x 0.1-g, 10
DLAB Classic Magnetic Stirrer/Hot Plate, 10
Single Buret Clamp, Plastic-Coated Jaw, 10
Flask, Erlenmeyer, Borosilicate Glass, 125 mL, 30
Cylinder, Borosilicate Glass, 25 mL, 10
Cylinder, Borosilicate Glass, 50 mL, 10
Cylinder, Borosilicate Glass, 500 mL, 10