2007-12-29 23:00:48 · 3 answers · asked by witchycake 2 in Science & Mathematics ➔ Chemistry
3% solution is 3g in 100 mL or 30g in one litre. The mol weight of H2O2 is 34, so to get the concentration divide 30 by 34, the answer in molarity is 0.88 M. For 30%, this is 8.8 M.
2007-12-30 01:56:59 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The 3% solution will contain 30g (3% of 1,000 g) hydrogen peroxide. To get the concentration in moles per dm3 (same thing as moles per litre), just divide that number by the molar mass.
Nothing more to it!
2007-12-30 00:17:15 · answer #2 · answered by Facts Matter 7 · 2⤊ 0⤋
3% = 0.03.
0.03 x 1kg (1 L) of water = 30g of Solute.
H2O2 Mol.mass = 34g/mole.
30g/34g/mole = 0.88 Molarity.
30% solution therefore = 0.88 x 10 = 8.8 Molarity.
2007-12-30 09:39:45 · answer #3 · answered by Norrie 7 · 0⤊ 0⤋