How would you work out the concentration if you had 0.0025 moles and 25cm3 of solution and the answer is in moles per litre.
2007-05-13 03:30:48 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
25 cm^3 is the same as 25 mL or 0.025 L
so 0.0025 mol/0.025 L = 0.01 mol/L
2007-05-13 03:36:15 · answer #1 · answered by borscht 6 · 0⤊ 0⤋
Just multiply 0.0025 by 40 since there are 40 25cm3's in a litre.
answer= 0.1 moles per litre.
2007-05-13 16:01:25 · answer #2 · answered by BB 7 · 0⤊ 0⤋
1000cm3 = 1 litre, so 25cm3 = (25/1000) = 1/40 litres
Concentration = 0.0025/(1/40) = 0.1 moles/litre
2007-05-13 13:33:06 · answer #3 · answered by Kemmy 6 · 0⤊ 0⤋
Moles = Concentration x Volume
0.0025 = Concentration x 25 x 10^-3
Concentration = 0.1 moles per litre
The x10^-3 is there to convert the cm^3 into litres (dm^3)
2007-05-13 10:38:14 · answer #4 · answered by Yates 2 · 0⤊ 0⤋
Concentration is measured as molarity. A Molar solution contains 1 mole per litre.
Your example has .0025 moles in 25 cm^3.
Hence in 1 cm^3 .0025/25
And in 1000 cm^3 (1 litre) 1000 x .0025/25 or .1 moles.
The solution is .1 M (sometimes called decimolar)
2007-05-13 11:28:24 · answer #5 · answered by lykovetos 5 · 0⤊ 0⤋
molarity= moles/litre.
1litre=1000cc
x litres=25cc
x litres =25/1000
x=0.025 litres
molarity=0.0025/0.025
=0.1M
2007-05-13 10:40:07 · answer #6 · answered by brilliantwaz 2 · 0⤊ 0⤋
0.0025mol in 0.025L (1/40th L)
0.0025 x 40 = 0.1 mol/L.
2007-05-13 15:28:06 · answer #7 · answered by Norrie 7 · 0⤊ 0⤋