00:03
Using potassium hydrogen thallate to standardize sodium hydroxide, we're given that the molar mass of khp is 204 .22 grams per mole, blah, blah, blah, blah, blah.
00:25
So we used a mass of khp of 0 .512 grams.
00:41
We had an initial breaerat reading of 2 .2 milliliters.
00:57
And a final burette reading of 22 .46.
01:16
So then we have several things to pillow.
01:24
Okay, one, if i'm reading this right, one, we are asked to solve for the volume of neoh dispensed, and that will be equal to 22 .46 milliliters minus 2 .22 milliliters, which will equal 22 .46.
01:55
Minus 2 .22, 20 .24.
02:07
Answer 1.
02:12
Answer 2.
02:14
What? it moved out of the way there.
02:19
Sorry about that.
02:20
Moles of k .h .p.
02:21
Used.
02:28
And that would be solved by taking our mass times the reciprocal of our molar mass, which was 204 .2 grams per mole.
02:48
Remember that was given.
02:49
0 .512 divided by 204 .22 is 2 .5071, a wrong later, times 10 to the minus 3.
03:08
And then correct sig figs, this would be 2 .51 times 10 to the minus 3 moles...