By Akita
Chemistry — KCSE 1995Paper 1
📚 Topic: Water and Hydrogen
Question 4📚 Topic: Water and Hydrogen
KCSE 1995 • CHEMISTRY PAPER 1 • QUESTION 4
Water Hardness and Soap Lathering
Topic: Water and HydrogenSub-topic: Soft and Hard Water
Question 4
4. 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 ( 1000\text{ cm}^3 ) of each sample of water before and after boiling.
| Sample I | Sample II | Sample III | |
|---|---|---|---|
| Volume of soap before water is boiled ( (\text{cm}^3) ) | 27.0 | 3.0 | 10.6 |
| Volume of soap after water is boiled ( (\text{cm}^3) ) | 27.0 | 3.0 | 3.0 |
a) Which water sample is likely to be soft? Explain. (2mks)c) Name the change in the volume of soap solution used in sample III. (1mk)
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