00:02
In this question we have two aqueous ionic compounds reacting.
00:07
We have to assume they're aqueous because otherwise they would not react.
00:10
So what we have here is a double replacement reaction.
00:20
And in the double replacement, also known as a double displacement, what happens is our two aqueous ionic compounds represented here as ab and xy, they exchange ions.
00:33
There should be a plus sign there.
00:35
But they exchange ions.
00:36
So what we have is the positive ion from the first compound combining with the negative ion from the second, and the positive ion from the second combining with the negative ion from the first.
00:47
Okay, so in our actual reaction here, we have sodium sulfate, so na2so4, and it's reacting with barium chloride, bacl2.
01:03
And as i mentioned, both of these need to be aqueous for this reaction to occur.
01:07
Alright, so when we exchange ions, the na is going to go with the cl.
01:14
Na has a positive one charge, and cl has a negative one charge.
01:19
So we just write it as nacl.
01:22
And this is going to be aqueous...