00:01
We are told that we have 98 .2 milliliters of one molar sodium hydroxide solution, and we mix that with 49 .1 millimeters of one molar sulfuric acid solution.
00:12
Our initial temperature of both solutions is 21 .45 degrees celsius.
00:24
After adding the noahoh, my final temperature goes up to 31 .30 degrees celsius.
00:32
We're going to assume a density of 1 .00 grams per milliliter.
00:39
We're going to assume the specific heat for everything is 4 .18 j over g degrees c.
00:49
And no heat is lost for their surroundings.
00:53
Write a balanced chemical equation.
01:05
And that will be, let's go ahead and it'll be 2 n -a -o -h -a -q.
01:14
Plus h2so4aq yields n -a -2 -s -o -4 -a -q plus 2h2o -l.
01:37
Okay, let me check.
01:40
Looking good.
01:41
And this will be plus heat as a product, or a negative number.
01:58
Remember to include phases.
02:00
I did.
02:01
Is there any 2 or be any noh or h -2s -o -4 left over? and the answer will be no.
02:21
That's easy to see.
02:23
Let's go ahead and figure this out.
02:25
98 .2 milliliters, and i'm just going to leave these both in milliliters times 1 .00 moles per liter of n -a -o -8.
02:37
Would require two moles of n -a -o -h per one mole of h2 s -o -4.
02:51
And that will equal 98 .2 times.
03:03
And that's 49 .1 moles of h2s -o -4 needed...