Thanks. Just bought some sodium citrate (trisodium citrate Na3C6H5O7) and did the math using molecular weights and density. Posting for future reference:
- 1 teaspoon = 4.93 ml
- Sodium citrate is 1.008 g/ml
- 4.969 grams of sodium citrate per teaspoon (4.93 x 1.008)
- using molecular weights of sodium citrate and 3 sodium atoms, by weight the sodium is 26.7% of sodium citrate
- 1326mg of sodium in 1 teaspoon (4.93 x 1.008 x .267)
hope that helps anyone interested. And someone correct me if my high school chemistry failed me!
This label found on Modernist Pantry:
puts Sodium at 235mg per gram of Sodium Citrate. Using 1 teaspoon = 4.969g from above, that puts sodium at 1168mg per teaspoon.
So three estimates per teaspoon:
- 1000mg rough estimate
- 1326mg from density and molecular weights
- 1168mg from a label
close enough!