How much salt for a beaker of water?

Question

for a science experiment i want to see the effect of salt on the boiling point of water. I have 4 beakers with around 100mls of water in each one (i think that will be the final amount)

How much salt do i need to put in the other three to make it evenly distributed and so i get a vast enough data?

Also, I want by beaker 3 or 4 the solution to become saturated. How much salt do I need for 100mls of water to become a saturated solution????

All in all, how much salt in the beakers please?

beaker 1 = 100mls water

beaker 2 = 100mls water + ? salt

beaker 3 = 100mls water + 2? salt

beaker 4 = 100mls water + 3? salt

HELP

Answer 1

The boiling point will be determined by the following equation:

delta T = imK where i is the van't Hoff constant (2 for NaCl); m is the molality (moles/kg) and K is the boiling point elevation constant for water (0.512).  So to raise the boiling point by 0.5 degrees centigrade, you will have to have a solution that is about 0.2 molal which means it should have 0.2 moles/kg or 0.02 moles/100 mls.  This is approximate since we haven't taken into account the weight of the NaCl, but for your experiment, this should work just fine.  

So, to answer your question

beaker 1 = 100 mls water

beaker 2 = 100 mls water + 1 grams NaCl

beaker 3 = 100 mls water + 5 grams NaCl (or 10 grams)

beader 4 = 100 mls water + 36 grams NaCl (saturated)

Answer 2

salt on the periodic tables has 1.0377 density, labeled NA CL

so times so multiply your number times 1.0377