alvis
Uploaded by
12 SLIDES
266 VUES
120LIKES

Exploratory Experiments on Dissolving Solids and Comparing Solution Concentrations

DESCRIPTION

This lab report outlines two experiments: Experiment 4.1 focuses on dissolving a solid in a liquid, investigating the solubility of an orange solid in different volumes of water. Following a structured procedure, students record the amount of solid added and compare color changes. Experiment 4.3 aims to compare the concentrations of saturated sodium chloride and sodium nitrate solutions. Students will measure, mix, and heat to determine the final concentrations. Both experiments emphasize scientific observation, hypothesis evaluation, and conclusion writing based on experimental outcomes.

1 / 12

Télécharger la présentation

Exploratory Experiments on Dissolving Solids and Comparing Solution Concentrations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Make up Labs 4.1 and 4.3

  2. Experiment 4.1 Dissolving a solid in a liquid • Purpose, Hypothesis, and Materials should come from your own pre-lab based on section 4.1 of the green book and the following procedure • Procedure is on the next slide

  3. Experiment 4.1 Dissolving a solid in a liquid Procedure • Collect materials • Add water to test tubes • A groups - 20 ml B groups – 5 ml • Add 0.3 g of orange solid • Place stopper on test tube and shake • If the solid completely dissolved, add 0.3 g more • Record observations and data • Keep track of total orange solid added January 21, 2014

  4. Experiment 4.1 Dissolving a solid in a liquid • Observations • How many grams did you add to the 20 ml test tube? • How many grams did you add to the 5 ml test tube? • How did the colors compare in each test tube throughout the experiment? • Conclusion • Restate hypothesis, was it supported, what evidence shows this, what are possible sources of error?

  5. Lab 4.3: Comparing concentrations of solutions Pre Lab – Due Tuesday January 28

  6. Lab 4.3: Comparing concentrations of solutions • Purpose: To compare the concentration of saturated solutions • Hypothesis: None required for this experiment • Materials: • 2 test tubes 5. Evaporating dish • 5 g of Sodium Chloride (NaCl) 6. Watch glass • 5 g of Sodium Nitrate (NaNO3) 7. Burner stand • 2 stoppers 8. Burner

  7. Lab 4.3: Comparing concentrations of solutions • Procedure: • Mass 5 grams of sodium chloride (A) or 5 grams of sodium nitrate (B) • Place substance in a test tube that contains 5 ml of water • Put the a stopper on the test tube and shake vigorously • Mass a clean dry evaporating dish and watch glass • Pour the liquid into the evaporating dish (be careful not to pour any of the undissolved solid in the evaporating dish).

  8. Lab 4.3: Comparing concentrations of solutions • Procedure: • Mass the evaporating dish liquid and watch glass together (system before heating) • Place the watch glass on top of the evaporating dish. • Heat to dryness • Allow the evaporating dish to cool • Mass the evaporating dish with its contents and watch glass (system after heating) • Calculate the concentrations of the solutions.

  9. Lab 4.3: Comparing concentrations of solutions

  10. Lab 4.3: Comparing concentrations of solutions

  11. Lab 4.3: Comparing concentrations of solutions

  12. Lab 4.3: Comparing concentrations of solutions • Conclusion • Write a conclusion about which solution had the greater concentration and why.

More Related