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Hydrochloric acid instead of citric acid to adjust SLS powder pH
The SLS powder that we use has a lot of base. When we neutralize it with citric acid, it creates a lot of foam. <div>
I saw a YouTube video citric acid+sodium hydroxide reaction and it created bubbles.
I saw another video hydrochloric acid+sodium hydroxide reaction and it didn’t create any bubble.
So if i use hydrochloric acid instead of citric acid to reduce SLS powder pH, would it create foam or not?
0.8% citric acid is needed to reduce pH of 1% SLS powder to 7.
I am asking this because here hydrochloric acid not available locally to test. I have to import it.
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2 Replies
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Bubbles happen probably due to CO2 production. You won’t have the same issue with HCl. Just keep in mind that neutralization is very exothermic, so better use very diluted solutions.
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Are you sure that was NaOH and not baking soda?
If so, probably because dissolving NaOH heats water a lot. That’s why it is suggested to dissolve it in cold water in ice bath
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