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Correct way to make 5% solution of sodium sesquicarbonate for Bronze Disease treatment.
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<p>[QUOTE="Theodosius, post: 3293530, member: 77077"]Just out of curiosity I decided to test the mixing directions from Forum. You sometimes learn useful things by testing for yourself the information you read.</p><p><br /></p><p>I have no way to test the making of sodium sesquicarbonate from their directions, but I could test their mixing ratio:</p><p><br /></p><p>“Mix 2 tablespoons of soda mix to three cups of water”</p><p><br /></p><p>Looking at a measuring cup graduated in cups and milliliters followed by some google searching, I found that 1 cup of water is about 235 milliliters.</p><p><br /></p><p>So, 3 cups of water equal 705 milliliters, call it 700 for simplicity.</p><p><br /></p><p>I decided to use [USER=99642]@Hookman[/USER] 's idea of zeroing the scale. Here is my high-tech apparatus.</p><p>[ATTACH=full]871178[/ATTACH] </p><p>I measured out 2 level tablespoons of sodium sesquicarbonate.</p><p>[ATTACH=full]871179[/ATTACH] </p><p>Which turned out to weigh 26.78 grams.</p><p>[ATTACH=full]871177[/ATTACH] </p><p>This equals a 3.7% solution, 26.78 / (700+26.78) = 3.68%.</p><p><br /></p><p>This is less than the 5% concentration recommended, which I think is much better than if it were significantly more concentrated than 5%.</p><p><br /></p><p>Next, I measured out 2 (very) heaping tablespoons.</p><p>[ATTACH=full]871180[/ATTACH]</p><p>Which turned out to be 46.12 grams.</p><p>[ATTACH=full]871181[/ATTACH] </p><p>This yields a 6.2% solution, 46.12 / (700 + 46.12) = 6.18%.</p><p><br /></p><p>This is more concentrated than recommended, but probably not dangerously more.</p><p><br /></p><p>That is an interesting difference in results depending on whether you interpret “tablespoon” as level or heaping. Now most bakers will tell you that unless the recipe specifically calls for “heaping” or “rounded”, then use level tablespoons. Another clue is that a tablespoon is defined as 15 milliliters of liquid, try making a heaping tablespoon of water sometime.</p><p><br /></p><p>Overall, I would rate the Forum directions as pretty good.</p><p><br /></p><p>John[/QUOTE]</p><p><br /></p>
[QUOTE="Theodosius, post: 3293530, member: 77077"]Just out of curiosity I decided to test the mixing directions from Forum. You sometimes learn useful things by testing for yourself the information you read. I have no way to test the making of sodium sesquicarbonate from their directions, but I could test their mixing ratio: “Mix 2 tablespoons of soda mix to three cups of water” Looking at a measuring cup graduated in cups and milliliters followed by some google searching, I found that 1 cup of water is about 235 milliliters. So, 3 cups of water equal 705 milliliters, call it 700 for simplicity. I decided to use [USER=99642]@Hookman[/USER] 's idea of zeroing the scale. Here is my high-tech apparatus. [ATTACH=full]871178[/ATTACH] I measured out 2 level tablespoons of sodium sesquicarbonate. [ATTACH=full]871179[/ATTACH] Which turned out to weigh 26.78 grams. [ATTACH=full]871177[/ATTACH] This equals a 3.7% solution, 26.78 / (700+26.78) = 3.68%. This is less than the 5% concentration recommended, which I think is much better than if it were significantly more concentrated than 5%. Next, I measured out 2 (very) heaping tablespoons. [ATTACH=full]871180[/ATTACH] Which turned out to be 46.12 grams. [ATTACH=full]871181[/ATTACH] This yields a 6.2% solution, 46.12 / (700 + 46.12) = 6.18%. This is more concentrated than recommended, but probably not dangerously more. That is an interesting difference in results depending on whether you interpret “tablespoon” as level or heaping. Now most bakers will tell you that unless the recipe specifically calls for “heaping” or “rounded”, then use level tablespoons. Another clue is that a tablespoon is defined as 15 milliliters of liquid, try making a heaping tablespoon of water sometime. Overall, I would rate the Forum directions as pretty good. John[/QUOTE]
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Correct way to make 5% solution of sodium sesquicarbonate for Bronze Disease treatment.
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