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  • How to Make Lye From Baking Soda and Hydrogen Peroxide

    I didn't see any straightforward, grams-based recipe and I couldn't puzzle out the percents-and-milliliters instructions. Here's what I think is correct based on the chemical equations and molar masses: To make 1.0 g NaOH I think you need 4.2 g NaHCO3 and 28 g 3% H2O2. I haven't tried this, though. :-)But you probably want a little excess H2O2 to ensure all of the baking soda is consumed; the remaining H2O2 should decompose and evaporate off by the time the lye is solid and dry.----Math for the above, just ignore unless you want to check my work:NaOH is 39.9971 g/mol1 g NaOH: 1/39.9971 = 0.025001813 mol NaOHNeed 2x of NaHCO3 (0.050003626 mol) and 1x of H2O2 (0.025001813 mol)NaHCO3 is 84.0066 g/mol: 84.0066×0.050003626 = 4.200634608 gH2O2 34.0147 g/mol: 34.0147×0.025001813 = 0.850429169 gS…

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    I didn't see any straightforward, grams-based recipe and I couldn't puzzle out the percents-and-milliliters instructions. Here's what I think is correct based on the chemical equations and molar masses: To make 1.0 g NaOH I think you need 4.2 g NaHCO3 and 28 g 3% H2O2. I haven't tried this, though. :-)But you probably want a little excess H2O2 to ensure all of the baking soda is consumed; the remaining H2O2 should decompose and evaporate off by the time the lye is solid and dry.----Math for the above, just ignore unless you want to check my work:NaOH is 39.9971 g/mol1 g NaOH: 1/39.9971 = 0.025001813 mol NaOHNeed 2x of NaHCO3 (0.050003626 mol) and 1x of H2O2 (0.025001813 mol)NaHCO3 is 84.0066 g/mol: 84.0066×0.050003626 = 4.200634608 gH2O2 34.0147 g/mol: 34.0147×0.025001813 = 0.850429169 gSo for 3% H2O2, you need 0.850429169/0.03 = 28.347638955 g

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