Point Arrow
Posted February 13, 2009
By admin
Can the arrow point to the left when writing a chemical reaction?
I know normally chemical reactions are written as "Reactants ---> Products", but can it also be correct to write "Products <--- Reactants"? I'm not talking about reversible reactions, just a standard, one-directional reaction.
For example, when writing out that magnesium chloride and hydrogen are produced when magnesium reacts with hydrochloric acid. Would it be wrong for me to write:
MgCl2 + H2 <--- Mg + 2HCl
Amounts to the same thing; it's just positional, although the method they teach...and which teachers have learned to expect...is the reactants -----> product format, although for reaction schemes and plant designs scribbled on the back of a cocktail napkin, it works just fine.
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