Why is Hydrogen Sulfate HSO4 not H2SO4? Please show the chemical formula of Hydrogen Sulfate by Criss-Cross Method.. As Using Criss-Cross Method it comes out to be H2SO4..
Hydrogen sulfate (or bisulfate) has the chemical formula HSO4-. The reason for this is because it only contains one hydrogen ion that can be replaced by a metal ion, whereas H2SO4 contains two hydrogen ions that can be replaced.
To write the chemical formula for hydrogen sulfate using the criss-cross method, you would first write the symbol for the cation (the metal or positively charged ion) and then the symbol for the anion (the non-metal or negatively charged ion) with their respective charges.
For example, if we want to write the formula for potassium hydrogen sulfate, which has a +1 charge for the potassium ion (K+) and a -1 charge for the hydrogen sulfate ion (HSO4-), we would use the criss-cross method as follows:
K+1 HSO4-1
_____
KHSO4
So the formula for potassium hydrogen sulfate is KHSO4.