Okay, I am trying my best to achieve an A or A* grade in ocr chemistry gcse, and I think I can do it, if I learn how to do the hard equations in C5. A question I just attempted (and epically failed at..) was this one:
KOH + HNO3 -> KNO3 + H2O
The concentration of potassiumhydroxide solution is 0.100mol/dm3
Calculate thenumber of moles in 25.0com3 of potassium hydroxide solution
- 0 followers
- 1 badge
- Thread Starter
- 02-06-2012 11:48
- 18 followers
- 3 badges
- 02-06-2012 17:54
Hey! First of all, you must convert the cm3 used in the volume into dm3, which you do by dividing it by 1000.
So the volume is 25.00/1000 = 0.025 dm3.
Then, to get the number of moles of solution, multiply the volume (dm3) by the concentration.
0.025 * 0.1 = 0.0025 mol