The chemistry behind the measurements – San-do and Amino San-do

The chemistry behind the measurements – San-do and Amino San-do

A friend1 helped me to understand the chemistry behind these characteristic sake parameters; san-do (acid level) and amino san-do (amino acid level). It is not that complicated once the basics are explain but without understanding the basics it is impossible to really know what is going on.

Foundational concept: the mole. A mole is a quantity of objects like a dozen. It allows us to map reactions between individual molecules and atoms and more manageable quantities like grams and liters. One mole of hydrogen is 1 gram. Hydrogen is the simplest and lightest atom with one proton and one electron. The electron weight is so small it is insignificant in comparison to the proton. So the proton as hydrogen itself has an atomic weight of 1. Each atom has an atomic weight, ignoring electrons, equal to the number of protons and neutrons it contains. The neutron weighs the same as the proton.

A carbon atom has 6 protons and 6 neutrons and thus has an atomic weight of 12. Because the carbon atom is 12 times that of hydrogen one mole of carbon would also be 12 times the weight of hydrogen or 12 grams.

Foundational concept: molarity or moles/Liter. To create a one molar solution (solution of one molarity) of carbon in water simply place 12 grams of carbon in a one liter container and add water until reaching the one liter level. When we talk about the concentration of elements based on chemical reaction equations we do so in molarity or moles per liter. Continue reading “The chemistry behind the measurements – San-do and Amino San-do”

  1. My fried is Jonathan Musther of New Zealand.