General ⇒ Forward and backward arrows in chemical equations

[Douggh]

Hi all. Need help urgent. Latex code for double forward and backward reactions in chemistry, please. Thank you greatly. Have looked at many posts and do not seem to have had this discussed before, yet I suppose it was done. Please help.

[Juanjo]

There are many packages to help writting chemical formulas. See here. It seems that the packages chemarr or chemarrow may be what you need.