Molarity!...?

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can someone tell me the molarity of 125ml solution containing 23.5g of sodium sulphate. (the MW of sodium sulphate is 322.20)

Cheers agus slainte

2007-06-06 15:43:20 · 3 answers · asked by philip c 1 in Science & Mathematics ➔ Chemistry

3 answers

Change grams Na2SO4 into moles dividing by MW.
23.5 / 322.20 = 0.0729 mol

Change 125 mL into L by dividing by 1000.
125 / 1000 = 0.125 L

Moles divided by liters is molarity.
0.0729 mol / 0.125 L = 0.583 M

2007-06-06 15:47:11 · answer #1 · answered by physandchemteach 7 · 0⤊ 0⤋

grams to moles
23.5 / 322.20 = 0.0729 mol
mL to L
125 / 1000 = 0.125 L
mol/L
0.584 M

2007-06-06 23:05:05 · answer #2 · answered by someone 5 · 0⤊ 0⤋

0.584 mol/L

2007-06-06 22:49:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋