AIM
To study of the similar cleaning capacity of a sample of soap in soft and hard water.
Why can’t hard water be used for washing purposes?
What causes permanent hardness of water?
How can temporary hardness of water be removed?
Out of water obtained from rain, pond, tap and hand pump, which one is best suited for cleaning purposes?
State the reason for deposition of white scale in the interior of boilers after prolong use?
State some units of hardness.
Which type of water is associated with heart diseases?
On what factor does the production of foam depend?
State some advantages of hard water.
Why is scum formed when hard water is treated with soap?
What are the positives of water softeners?
State some negative effects of using water softeners.
What is the role of buffer solution in measuring the hardness of water?
What are the other names of temporary and permanent hardness?
Why is soft water not considered good for swimming pools?
Write the equation for the formation of scum?
How can you soften the hard water?
Give any two difference between hard water and soft water?
Which will form more foam – rain water or distilled water?
Can you write the formula for sodium stearate?