1. You need to make two solutions: 0.01 M NaCl (f.w.=58.44) and 0.01 M glucose (f.w.=180). Which do you weighout more of?
    1. NaCl
    2. glucose, 0.01 x 180 = 1.80 gram (vs 0.01 x 58.44 = 0.5844 g of NaCl)
    3. Neither - you weigh out the same amount of each.

  2. You need to make two sollutions: 0.1% M NaCl (f.w.=58.44) and 0.1% M glucose (f.w.=180). Which do you weighout more of?
    1. NaCl
    2. glucose
    3. Neither - you weigh out the same amount of each: 0.1 gram (=100 mg)

  3. Your powdered substance has a f.w.=100. How much do you wiegh out to make 1 liter of 1 molar solution?

    100 grams (making molar solutions is where molec. weight counts)

  4. How much of the substance (f.w.=100) do you weigh out to make 200 mL of a 2% solution?

    If it takes 2 grams to make 100 mL of a 2% solution,
    then it should take 4 grams to make 200 mL of a 2% solution.

  5. You have your 1 molar liter of substance but no more powder left. How much of the 1 molar do you use to make 500 mL of a 0.2 molar solution?

    CV=CV; 1M x V = 0.2M x 500 mL
    V = 100 mL