00:01
Firstly, let's summarize the given data.
00:06
Concentration of potassium hydroxide equals 0 .270 molar.
00:17
Volume of sulfuric acid equals 15 .2 milliliters.
00:30
And concentration of sulfuric acid is 0 .285 molar.
00:42
The task is to find the volume of potassium hydroxide millilitres.
00:55
Let's rewrite reaction equation.
01:01
Sulfaric acid plus two molecules of potassium hydroxide equals two molecules of water plus potassium sulfate.
01:22
Firstly, let's find the number of moles of sulfuric acid.
01:32
It equals concentration 0 .285 mol per liter times 15 .2 mills divided by 1 ,000.
01:53
So conversion factor 2 liters.
01:57
And we obtain 4 .332 times 10 in power minus 3 .3...