00:01
Because they gave us the kb value, i assumed that they were going to request other calculations, but they didn't.
00:08
So we really don't need the kb value for answering these three questions.
00:14
A just wants you to write the net ionic equation.
00:17
That'll be h plus coming from hydrochloric acid reacting with the base to produce its conjugate acid that will become protonated, and that's pretty much it.
00:26
Then for part b, to determine the moles of c5h5n that would be present before the reaction takes place, we simply take the volume of the base multiplied by its molarity.
00:40
The volume needs to be expressed in liters, so we'll divide 75 by 1 ,000 to get liters, and then multiply by the molarity, and the leaders will cancel and will be left with moles of base that we are starting with before the reaction occurs.
00:56
Then we add our 100 milliliters of 0 .50 molar hcl...