DSERT - 7 - Science :: Hard water and Soft water

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Go To: DSERT-Science-Grade 7

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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]


https://www.youtube.com/watch?v=ebygQes5Wig (Hard and soft water - English)

https://youtu.be/w7tUZIVz5LE (Turn hard water soft - English)


[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 - 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
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