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In an experiment, soap solution was added to three separate samples of water. The table below shows the volumes of soap solution required to form...

      

In an experiment, soap solution was added to three separate samples of water. The table below shows the volumes of soap solution required to form lather. with 100cm³ of each sample of water before and after heating / boiling.
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a) Which water sample is likely to be soft? Explain.
b) Explain the change in the volume of soap solution used in sample C.

  

Answers


Kavungya
a) B: Because it requires little soap / less soap to form lather.
b) Sample C has temporary water hardness which is removed by boiling
Kavungya answered the question on May 23, 2019 at 09:19


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