00:02
We're writing some balanced chemical equations.
00:04
First we're told that phosphorus reacts with fluorine gas to produce phosphorus trichloride.
00:38
And it says balanced chemical equations, it's not giving me...
00:49
I'm going to see if i can figure out.
00:51
I think that's a gas.
01:01
It's a colorless liquid.
01:06
So this tells me it's a colorless liquid.
01:09
Okay.
01:10
So let me go back to my problem.
01:13
Write a balanced chemical phosphorus reacts with chlorine gas for phosphorus trichloride.
01:17
So you'll have two here, a three here, and a two here.
01:23
Next, this is our first one.
01:26
The product, which was p .c .l .3, reacts with water to form phosphorous acid.
01:55
So we have p .c .l .3 plus h2o.
02:24
Let me go back to my...
02:41
The product's reaction with water forms phosphorous acid.
02:58
And i believe it's also going to have to have some hcl.
03:04
Oops, sorry about that.
03:07
So let's check here.
03:08
I've got three oxygens.
03:13
If i'd put a three here and a three here, let's see what i do.
03:17
One phosphorus, one phosphorus.
03:25
I have three chlorines, chlorine, three chlorines.
03:28
Six hydrogens, one, two, three, five, six.
03:31
Three oxygens, three oxygens.
03:33
So that one's done.
03:36
And where's, oh my goodness, i lost my.
03:39
I lost my problems.
03:44
There it is.
03:44
Goodness.
03:46
White phosphorus.
03:50
What is happening? white phosphorus.
04:01
White phosphorus formula.
04:03
I'm going to check the white phosphorus formula is p4.
04:07
So my next one, we've got p4.
04:12
White phosphorus reacts with oxygen, gas, to form tetrafosaurus decauxide.
04:27
The product's reaction with water forms phosphoric acid.
04:45
Okay, so this will need a five.
04:48
That one's done.
04:53
And hang on a moment.
05:05
And i believe that's all i need on this one for before i balance here.
05:13
And i believe i'll need a four here and that'll give me 12 and a six there.
05:21
That'll be 16 and 6 and 10.
05:24
So there's my third one.
05:28
Then last but not least, calcium, dihydrogen, phosphate.
05:43
Reacts with sodium, hydrogen, carbonate.
05:48
I better write this over a little bit further.
06:06
Reacts with sodium -hydrogen carbonate...