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Thread: Water to Acid vs Acid to Water

  1. #11
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    Quote Originally Posted by PoolDoc View Post
    Was that lab acid, or 31% commercial acid?

    I'm going to have to try that.
    Don't know. I wouldn't recommend trying it. Look it up on YouTube instead.
    22'x40' Grecian Lazy L 20K gal IG vinyl pool; Aqua Rite SWCG; Hayward Pro Grid 6020 DE filter; Hayward Superpump 1hp pump; 12 hrs; I put together individual Taylor kits that combined is the same as the Taylor K-2006; city; PF:6

  2. #12
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    CarlD is offline Super Moderator Quark Inspector CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
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    Quote Originally Posted by JimK View Post
    The demo I saw of a drop of water dropped into a beaker of HCL resulted in a very violent explosion.
    Hence why you ALWAYS pour the acid into the water, not the other way around! (Ka-BOOOM!!!!)
    Carl

    16'x40' rectangle 19K gal AG vinyl pool; ; Hayward T210 sand filter and 2 Speed Superpump 1hp pump; Solar heated. Test kit: PS 233; PF:6.3; Autopilot SWCG

  3. #13
    chem geek is offline PF Supporter Whibble Konker chem geek 4 stars chem geek 4 stars chem geek 4 stars chem geek 4 stars
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    The heat (enthalpy) of dilution for some acids is given in this link. 31.45% HCl is around 10 so the heat of dilution is roughly 10 kJ/mol. 38.5% Sulfuric acid, by comparison, has a heat of dilution of around 28 kJ/mol so substantially higher. This link calculates the temperature rise for a specific example of adding acid to water and explains why adding water to acid is not a good idea. It basically has the water heat up so much that it can boil and splatter, causing acid to be propelled with it risking getting splashed with concentrated acid.
    15.5'x32' rectangle 16K gal IG concrete pool; 12.5% chlorinating liquid by hand; Jandy CL340 cartridge filter; Pentair Intelliflo VF pump; 8hrs; Taylor K-2006 and TFTestkits TF-100; utility water; summer: automatic; winter: automatic; ; PF:7.5

  4. #14
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    Default Re: Water to Acid vs Acid to Water

    I like adding the acid slowly to the pool all the way round and letting it fume, I grab my air guitar and sing "Smoke on the water"
    Passivpool Energy A++ rated pool, the most efficient in the world! 24ft x 12ft, 12000 gallons I/G vinyl lined pool, variable speed pump 0.08hp,(30-60 watts) running 24/7. AFM glass media 24" sand filter, Strantrol chemical injection

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