DSERT - 7 - Science :: Hard water and Soft water
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[Author - Anu Nived]
Objective: To teach the students about hard water/soft water
Subtopics to be covered:
- Methods to soften hard water
- Heavy water
- Types of hydrogen atom
Learning Outcome:
- Students know about the difference between hard and soft water
- They know about the disadvantages of hard/heavy water
[Author - Kripa S]
http://ktbs.kar.nic.in/new/website%20textbooks/class7/7th-kannada-science-01.pdf#page=137 (Kannada Medium)
http://ktbs.kar.nic.in/new/website%20textbooks/class7/7th-english-science-01.pdf#page=137 (English Medium)
[Author - Kripa S]
https://www.youtube.com/watch?v=ebygQes5Wig (Hard and soft water - English)
https://youtu.be/w7tUZIVz5LE (Turn hard water soft - English)
[Author - Anu Nived]
http://www.goldwatergroup.ca/wp-content/uploads/2016/10/eagle-water-treatment-hard-water.jpg (effects of hard water)
http://www.vanislewater.com/sites/default/files/img_gallery/water%20treatment/hard-soft-water.jpg (hard and soft water)
[Author - Kripa S, Nandini N]
1. Take two glasses of water. Add salt in one glass and mix well. Now add one pinch of soap powder in both the glasses of water. You will observe that the soap dissolves faster in the water without salt (soft water), but takes more time to dissolve in salt water (hard water)
2. When you store hard water in a vessel, you will see salt sediments in the vessel after water evaporates. Observe at home and share your points.
3. https://drive.google.com/open?id=0BzNF2YyqQxJ-RHV1NTBmbkdkbE0
[Author - Nandini N]
https://drive.google.com/open?id=0BzNF2YyqQxJ-M0Y2alB4VU9rS1k
[Author - Apoorva Ramachandra]
| Term | Transliterated Term | Translated Term | |
| Salts | ಸಾಲ್ಟ್ಸ್ | ಲವಣಗಳು | |
| Disadvantage | ಡಿಸ್ಅಡ್ವಾಂಟೇಜ್ | ಅನಾನುಕೂಲ | |
| Physical Property | ಫಿಸಿಕಲ್ ಪ್ರಾಪರ್ಟಿ | ಭೌತಿಕ ಲಕ್ಷಣ | |
| Heavy water | ಹೆವಿ ವಾಟರ್ | ಭಾರ ಜಲ | |
| Hard water | ಹಾರ್ಡ್ ವಾಟರ್ | ಗಡಸು ನೀರು | |
| Soft water | ಸಾಫ್ಟ್ ವಾಟರ್ | ಮೆದು ನೀರು | |
| Solvent | ಸೋಲ್ವೆನ್ಟ್ | ದ್ರಾವಕ | |
| Universal | ಯೂನಿವರ್ಸಲ್ | ಸಾರ್ವತ್ರಿಕ | |
| Scaling | ಸ್ಕೇಲಿಂಗ್ | ಸ್ತರಿಗೊಳಿಸುವಿಕೆ | |
| Temporary | ಟೆಂಪೊರರಿ | ತಾತ್ಕಾಲಿಕ | |
| Permanent | ಪರ್ಮನೆಂಟ್ | ಶಾಶ್ವತ | |
| Boiling | ಬೋಯ್ಲಿಂಗ್ | ಕುದಿಸುವುದು | |
| Ion Exchange | ಅಯಾನ್ ಎಕ್ಸ್ಚೇಂಜ್ | ಅಯಾನು ವಿನಿಮಯ | |
| Discovery | ಡಿಸ್ಕವರಿ | ಸಂಶೋಧನೆ |
[Author - Nandini N]
https://drive.google.com/open?id=0BzNF2YyqQxJ-cHJfSENBYTJyeW8
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