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1) Since calcium and magnesium salts of fatty acids are not soluble in water, describe how would you expect this to influence the usefulness of soap in hard water?

2) If you were to make soap (by using 4 grams of lard, 2 mL of 7.8 M sodium hydroxide and boiling it) and add it to the given and inverting, what would you expect to see as far as results?

a) Medium test tube of 1/4 de-mineralized water and 10 drops 0.1 M CaCl2

b) Medium test tube of 1/4 de-mineralized water and 10 drops 0.1 M NaCl

c) Medium test tube of 1/4 de-mineralized water and 10 drops 0.1 M MgCl2

d) Medium test tube of 1/4 de-mineralized water

3) describe why would these results take place the way they did?

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  • Category:- Biology
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