If you are looking for NCERT Science Class 10 Chapter 4 Activity solutions, then you are in the right place. In this post, you will find NCERT Activity 4.11 Class 10 Science Explanation with conclusion.
NCERT Activity 4.11 Class 10 Science Explanation with conclusion
You are
suggested to study NCERT activity 4.11 class 10 science explanation with
conclusion so that you can attempt questions based on the activity 4.11 class
10 science.
Chapter 4 - Carbon and its Compounds
Activity 4.11 Class 10 Science
· Take
about 10 ml of distilled water (or rainwater) and 10 ml of hard water (from a
tubewell or hand pump) in separate test tubes.
· Add
a couple of drops of soap solution to both.
· Shake
the test tubes vigorously for an equal period of time and observe the amount of
foam formed.
· In
which test tube do you get more foam?
· In
which test tube do you observe a white curdy precipitate?
Note for teacher:
If hard water is not available in your locality, prepare some hard water by
dissolving hydrogen carbonates, sulphates/chlorides of calcium or magnesium in
water.
Discussion:
The test tube containing distilled water produces foam readily.
On the other hand, a test tube that contains hard water
produces a curdy white precipitate due to the formation of insoluble calcium or
magnesium salts.
Conclusion:
Distilled water or soft water readily produces foam with soaps while hard water
produces a curdy white precipitate.
Related Topics -
1. Next activity - Activity 4.12 Class 10 Science
2. Previous activity - Activity 4.10 Class 10 Science
3. Solution of Chapter 4 Carbon and its Compounds
5. Extra Questions of Chapter 4
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