Answer:
I think C but it could be D
Explanation:
I would say go for C
Correct answer is 
.
Phosphoric acid is a polyprotic acid having 3 acidic hyrdogen therefore it will have 3 pka values.
The equations for the release of acidic hydrogen can be written as:
From the pka values we can judge the idea of pH as using Henderson-Hasselbalch Equation, we get the relation between pH and pka.
Using the following equation, relation of pH and pka is
![pH=pka+log\frac{[A^-]}{HA}](https://tex.z-dn.net/?f=pH%3Dpka%2Blog%5Cfrac%7B%5BA%5E-%5D%7D%7BHA%7D)
Using this equation, we can find that the equation having pka= 2. 14 is closest to the pH=3.2 so the ionic form in this equation will be dominant at the same pH.
Therefore at pH=3.2 the ionic form of 
is dominant.
Answer:
Physical Changes:
Let's say during your camping trip you stepped on a twig. This would be a physical change.
Let's also say that while there, you accidentally stepped on a flower, causing it to fall off of it's stem. This would also be a physical change.
Chemical Changes:
Let's say you start a fire using wood that you got from this rainforest. Since the act of burning something is a chemical change, this would apply.
Let's also say you forget a banana peel there. After a while, it would start to rot. And since rotting is a chemical change, this would apply as well.
Explanation:
Hope this helps!
Answer:
There is 1 Sodium in NaCl, but 2 Sodiums in the sulfide. I can’t write it properly. But the “2” should be a subscript.
Explanation:
It leads up to the climax.
