assume that its unpure
2006-12-12 03:50:35 · 4 answers · asked by dwillchick 1 in Science & Mathematics ➔ Chemistry
Isopropyl ... what?
If you are refering to isopropyl alcohol (isopropanol) then, since it is a liquid most probably 28% is (v/v), meaning 28 ml of isopropanol in 100 ml of solution.
Density of pure isopropanol is d=0.785 g/ml =mass/Volume =>
mass=d*Volume = 0.785*28 = 21.98 g in 100 ml solution
=>219.8 g in 1L solution
molecular weight is MW=60.1, so you have 219.8/60.1= 3.66 mole/L
2006-12-12 06:12:04 · answer #1 · answered by bellerophon 6 · 0⤊ 0⤋
28% IS the concentration of isopropyl alcohol mixed with water. Are you trying to get to the molar concentration, or some other concentration units? 28% generally means 28 grams of isopropyl alcohol mixed in water to give 100 grams of solution.
2006-12-12 11:54:59 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋
this means that for every 100 ml water solvent , 28 gm of isopropanol is added
2006-12-12 12:00:20 · answer #3 · answered by Diamond 2 · 0⤊ 0⤋
28%....
2006-12-12 11:52:40 · answer #4 · answered by Roman Soldier 5 · 0⤊ 0⤋