Practical Proof
.docx
School
University of Washington**We aren't endorsed by this school
Course
CHEM 120A
Subject
Chemistry
Date
Dec 19, 2024
Pages
1
Uploaded by PrivateJellyfishPerson3486
Practical ProofPurpose:To investigate some evidence for the particle theory of matterRequirements:Petri dish, water, copper sulfate crystals, spatula, sodium hydrogen carbonate (sodium bicarbonate)Procedure:1.Fill a petri dish with water and leave it to sit on your bench for a few minutes to make surethat the water is still.2.Carefully add a copper sulfate crystal to one end of the petri dish, using a spatula3.Add a crystal of sodium hydrogen carbonate to the other end of the dish4.Leave the crystals to sit quietly. Record your observationsQuestions:1.Draw a series of diagrams of your observations over time.2.Explain your observations using terms such as ‘particles,’ ‘dissolving,’ ‘movement,’ ‘diffusion.’When the copper sulfate crystal was added to the water, the particles were diffused throughthe water. As the copper sulfate diffused it also started to dissolve. When the sodium hydrogen carbonate was added, is also started to diffuse and dissolve. When the two met, they repelled.
