There is a need to measure the soap’s ability to react with metallic salt to determine whether it can withstand hard water. Any soap that does not produce much foam is ineffective in cleaning the fabric or skin.
Prepare the experimental soap bar you made and the different concentrations of metallic salts (discussed already in the previous blogs). Cut 9 small cubic sizes from the soap bar. Each cube may weigh about 0.5 gram.
Prepare 51 clean 50-ml test tubes with caps and a ruler. If you have limited number of test tube then do it one at time.
You will be guided with the rest of the steps by completing the table below:
After the experiment, ask a statistician for an appropriate statistical tool interpretation of this data.
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