Consider the soap molecules at the top of page 495 and the ionic compound potassium acetate.

(a) Draw a dot diagram for the acetate ion, and then place a K⁺ ion next to the O bonded to C by a single bond.

(b) What is the similarity between potassium acetate and a soap molecule? How do they differ?

(c) Hard water often contains calcium ions, which react with soap molecules to form a solid soap scum. Draw a soap scum molecule, using a soap molecule containing ten C atoms. What is the molecular formula of this soap scum molecule?

Data from Page 495

Transcribed Image Text:

КОН КОН КОН Potash Н.С- CH- CH₂ 0 0 c=0 c=0 CH, CH CH₂ CH₂ CH₂ CH₂₁ One fat molecule Heat CH₂ CH₂ CH CH Three soap molecules H₂C-CH-CH₂ ГІ OH OH OH Glycerol