Thanks for your help everybody, I think I have it. I just want to check your answers on mine with this last one for sure. You guys rock!
2007-04-22 04:57:17 · 3 answers · asked by Kayla C 1 in Science & Mathematics ➔ Chemistry
Molarity = number of moles/volume in litres
Number of moles= Molarity* volume in litres= 0.2*50/1000= 0.01moles
Mass of sodium hydroxide = molar mass* number of moles= 40*0.01= 0.4 grammes.
2007-04-22 05:02:12 · answer #1 · answered by The exclamation mark 6 · 0⤊ 0⤋
Molecular mass of NaOH = 40
=> for 1000 ml 0.2NaOH we need 0.2*40 grams
= 8 grams
hence for 50 ml we need (50/1000) * 8 = 0.4 grams
enjoy chemistry
Sunil
(give me 10 points if you understood)
2007-04-22 12:02:02 · answer #2 · answered by SuNiL 3 · 0⤊ 0⤋
50 ml of 0.2 N NaOH is 0.01 moles of NaOH.
0.01 moles * 40 g/mol = 0.4 g
2007-04-22 12:00:54 · answer #3 · answered by TheOnlyBeldin 7 · 0⤊ 0⤋