Decoding and Separating Mixtures: A Chemistry Exercise, Slides of Chemistry

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PARTING

MIXTURES

A. DECODING MIXTURES

Legend 1-A 11-K 21-U 2-B 12-L 22-V 3-C 13-M 23-W 4-D 14-N 24-X 5-E 15-O 25-Y 6-F 16-P 26-Z 7-G 17-Q 8-H 18-R 9-I 19-S 10-J 20-T A. Decode the following:

1. 5-22-1-16-15-18-1-20-9-15-
2. 4-5-3-1-14-20-1-20-9-15-
3. 4-9-19-20-9-12-12-1-20-9-15-
4. 19-20-18-1-9-14-9-14-
5. 23-9-14-14-15-23-9-14-
6. 3-5-14-20-18-9-6-21-7-1-23-9-14-
7. 6-9-12-20-18-1-23-9-14-
8. 4-9-1-12-25-19-9-
9. 16-1-14-14-9-14-
10. 18-5-3-20-9-6-9-3-1-23-9-14-

WAYS OF SEPARATING HETEROGENEOUS MIXTURES

• Separation using Fans and Wind
• Separation by gravity
• Separation by panning
• Separation by Immiscible liquids
• Separation using strainer
• Separation using magnets

SEPARATION USING FANS

AND WIND

• A traditional way of separating rice grains from hulls is done through winnowing. In this process, grains are tossed in front of a fan. The lighter objects like rice hull and dirt are blown away while the heavier rice grains fall straight into the container.
• Alternatively, this can be done only with a bilao. In the Philippines, a traditional way of winnowing is done by tossing the mixture of rice and hulls placed on a bilao.

SEPARATION BY PANNING

• A traditional used by gold hunters to get gold is through panning.
• When a person pans, they scoop gravel from the riverbed. They get a small amount of water and gently swirl the pan. This separates the heavy and light materials in the mixture.

SEPARATION BY IMMISCIBLE

LIQUIDS

• Immiscible liquids like oil and water can be separated by pouring or scooping out the topmost liquid. This process is called Decantation.

SEPARATING USING

MAGNETS

• Magnets can pick out some metals from a mixture. Recycling facilities recover scrap metal using electromagnets.