I am an electronics guy with not so much knowledge of chemistry. I would like to prepare a pH 7 buffer to test pH meters.
All web references I have found so far describing how to make a phosphate buffer use disodium phosphate (Na2HPO4) and Monosodium phosphate (NaH2PO4) as ingredients.
I have a good supply of 85% phosphoric acid and solid sodium hydroxide. Can I make a pH 7 buffer from these ingredients instead or is there a catch?