Homework #11

#20 - 27 33, 35

20.
      a. soft drink
      b. black coffee
      c. milk of magnesia

21. Two times more acidic.

22. When the pH is too low the fish egg's development is impaired, causing the ability to reproduce to go down. High pH levels are bad for living organisms because alkaline solutions are able to dissolve organic material, like skin and scales. Bodies of water with low pH levels tend to have an affect on the ions in fish, ultimately affecting us.

23. Polar molecules have opposite charges, an example is in water molecules. Oxygen is more electronegative than hydrogen, the electrons are pulled towards the oxygen atom. Nonpolar do not dissolve in polar solvents.

24. Lampoil because it is a nonpolar molecule. This means that the nonpolar lampoil would dissolve in the nonpolar substance.

25. Because table salt ( NaCl ) is a polar molecule.

26. " Like dissolves like " is talking about how polar molecules dissolve in polar substances and how nonpolar molecules dissolve in nonpolar substances.

27. Because the molecules are not the same. " like dissolves like "

33.
      a. Nonpolar molecules
      b. It is more effective because more of a variety of substances dissolve in nonpolar solvents.

35. Hydrogen because its has an already present +1 charge.