In an experiment, soap solution was added to three samples of water. The results below show the volume of soap solution required to lather with 500cm3...

      

In an experiment, soap solution was added to three samples of water. The results below
show the volume of soap solution required to lather with 500cm3 of each water sample before and after boiling
Q36102520191117.png
(i) Which water samples are likely to be soft?
(ii) Explain the change in volume of soap solution used in sample 2

  

Answers


Maurice
(i) Sample 1 and 2

(ii) Sample 2 contained ions that caused temporary hardness therefore required large volume of soap solution before boiling, but after boiling the temporary hardness was removed, hence requiring very little volume of soap solution to lather.
maurice.mutuku answered the question on October 25, 2019 at 08:21


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