for my calculations i need to know how many ml of water there is in 15ml of Hydrochloric acid (conc. 2M). Please help asap!!
2007-04-02 00:59:25 · 4 answers · asked by Oli 1 in Science & Mathematics ➔ Chemistry
1 mole HCl
1 x H = 1 x 1 = 1g
1 x Cl = 1 x 35.5 = 35.5g
= 35.5 +1 = 36.5g
2 moles = 36.5 x 2 = 73g
2 moles per litre = 73 g per litre (1000g)
73g in 1000g
0.073g in 1g
(0.073 x 15)g in 15g
=1.095g HCl in 15g HCl(aq)
15 - 1.095 = 13.905g Water
1 mole of water (H2O)=
2 x H = 2 x 1 = 2g
1 x O = 1 x 16 = 16 g
= 2 +16 = 18g
No of moles = mass give / mass of 1 mole
= 13.905 / 18 = 0.7725 moles of water
2007-04-02 05:27:07 · answer #1 · answered by Maureen 3 · 0⤊ 0⤋
Work it out from first principles dude. A molar solution is 1 molecular mass of compound made up to 1 litre of liquid volume water, since it is a mass amount and not volume you will need the specific density of the HCL at STP of course to obtain weight to volume conversion using this you can then calculate the remaining volume of water required to make your solution. Quite why you'd want to I have no idea.
2007-04-02 08:13:26 · answer #2 · answered by pete m 4 · 0⤊ 1⤋
You must assume it's also 15ml. The HCl was in the form of a gas when it was dissolved.
2007-04-02 08:09:52 · answer #3 · answered by Gervald F 7 · 0⤊ 2⤋
Maureen has it spot on
2007-04-05 16:31:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋