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How to make the spice Sumac and Sumac lemon pepper
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The Hydrochloric acid was too strong at 22% so I redid it with weak sulfuric acid. The concentration of sulfuric acid was 0.4 moles H2SO4 per L. Afterwords calcium carbonate will be combined to convert all the sulfuric acid into calcium sulfate (insoluble). Here an initial image. See next comment.
Athough 5%-1% = 4% We round 3.7% to 4%. So 3.7 to 4% sulfuric acid is fine.
Here is a hot water bath were the solution of sulfuric acid is kept at 70 degrees C and a yellow color is appearing. Polytannins converting into gallic acid.
Here is an outdoor boiling flask with 22% HCl with 30 g of smooth sumac. Waterbath in a ceramic bowl keeps the HCl near 40 degrees causing it to evaporate more slowly and pass into a sodium carbonate solution. A fan on High blows away any remaining HCl fumes.
Here is a link to tannic acid levels in berries of sumac. 15-20%.http://griffindyeworks.com/understanding-mordants/...
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