1 / 13

Separating Mixtures

Separating Mixtures. Purpose. To separate mixtures using a substance’s physical properties. Materials. Beaker, 50 mL Beaker , 250 mL Hot plate Filter paper Triple beam balance Magnet Salt Stirring Rod Zinc. Water Screen Beaker, 100 mL Watch glass Iron Paper

armand
Télécharger la présentation

Separating Mixtures

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. Separating Mixtures

  2. Purpose • To separate mixtures using a substance’s physical properties.

  3. Materials • Beaker, 50 mL • Beaker, 250 mL • Hot plate • Filter paper • Triple beam balance • Magnet • Salt • Stirring Rod • Zinc • Water • Screen • Beaker, 100 mL • Watch glass • Iron • Paper • Funnel • Weighing paper • Graduated cylinder

  4. Pre- Lab • What is a mixture? • Contrast homogeneous and heterogeneous mixtures. • Define filtration.

  5. Procedures • Get the mass of a piece of weighing paper and record it in Data Table 1. • Pour the mixture of iron, sand, zinc, and salt from the watch glass to the weighing paper. Record its mass in Data Table 1. • Place the screen on top of a 100 mL beaker and pour the contents from the weighing paper on top of the screen. • Pour the mixture from the 100 mL beaker onto a piece of paper. • Place the zinc on a piece of weighing paper and record its mass in Data Table 1. Also, make observations about the substance’s size, color, or other properties in Data Table 2.

  6. Procedures • Remove the iron from the mixture with the aid of a magnet. To do so, have your partner move the magnet back and forth underneath the paper to move the iron to the edge of the paper. DO NOT LET THE IRON TOUCH THE MAGNET. Using a spatula, transfer the iron to a piece of weighing paper. Record its mass in Data Table 1 and record your observations in Data Table 2.

  7. Procedures • Transfer the sand and salt mixture that remains to a 50-mL beaker. • Add 20 mL of water to the 50 mL beaker and stir with a glass stirring rod to dissolve the salt. • Get the mass of a piece of filter paper and record its mass in Data Table 1. Place the filter paper in the funnel.

  8. Procedures • Get the mass of a 250 mL beaker and record its mass in Data Table 1. Place the funnel on top of the beaker and filter the mixture through the 250 mL beaker. Collect the filtrate (the liquid that passes through the funnel). • Wash the residue in the filter with 15 mL of water, and collect the rinse water with the filtrate. • Allow the filter paper with the sand to dry overnight. Once dried, record its mass in Data Table 1 and make observations in Data Table 2.

  9. Procedures • Evaporate the water from the filtrate by placing the 250 mL beaker on the heating coil of a hot plate on medium. • Stop heating just before the liquid completely disappears. • After the beaker has cooled, get its mass and record in Data Table 1. Make and record your observations about the substance in Data Table 2.

  10. Data Table 1

  11. Data Table 2

  12. Analysis • What method did you use to isolate the glass beads from the rest of the mixture? • What method did you use to isolate the iron from the rest of the mixture? • What method did you use to isolate the sand from the salt? • What method was used to isolate the salt from the salt water mixture? • Why was it necessary to take the mass of the weighing paper before adding the mixture? • What is one error that could have been made when isolating each of the following: • Glass beads • Iron • Sand • Salt • Suppose that sand was found in your filtrate. Why would this be a problem?

  13. Conclusion • Discovery: What did I learn from doing this experiment that I did not know before? • Application: How can I apply what I have learned from this lab to physical science? (Think about situations where making good observations may be very important.

More Related