Since calcium and magnesium salts of fatty acids are, Ask an Expert

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1) Since calcium and magnesium salts of fatty acids are insoluble in water, how would you expect this to affect the usefulness of soap in hard water?

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

1) Medium test tube of 1/4 demineralized water & 10 drops 0.1 M CaCl2
2) Medium test tube of 1/4 demineralized water & 10 drops 0.1 M NaCl
3) Medium test tube of 1/4 demineralized water & 10 drops 0.1 M MgCl2
4) Medium test tube of 1/4 demineralized water

3) Why would these results occur the way they did?

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