Skip to main content
Chemistry LibreTexts

Underwater Fireworks

  • Page ID
    3129
  • \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)

    Reaction

    Acetylene gas is generated by reacting calcium carbide (CaC2) with water. The equation is

    CaC2 (s) + 2 H2O (l) -> Ca(OH)2 (aq ) + C2H2 (g )

    The resulting acetylene gas and chlorine gas (introduced directly as gas) react upon contact to generate flames (underwater) and the formation of solid carbon and hydrochlotic acid.

    C2H2 + Cl2 -> -> 2 HCl (g) + 2 C(s )

    Safety

    The resulting liquid is acidic (how much depends on how long the reaction occurs) and needs to be neutralized before disposal.


    Underwater Fireworks is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

    • Was this article helpful?