Mysterious 'Eruptions' When Mixing Coca-Cola and Crown Royal

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SUMMARY

The discussion centers on the phenomenon of "eruptions" occurring when mixing Coca-Cola from a regular red can with Crown Royal whiskey in a plastic cup. This reaction is attributed to the interaction between the carbonation in Coca-Cola and the ingredients in Crown Royal, potentially similar to the mentos-soda reaction caused by gum arabic. Participants noted that this specific combination produces small streams of liquid shooting up from the surface, a reaction not observed with other drink mixtures.

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  • Knowledge of the chemical composition of Coca-Cola and Crown Royal
  • Familiarity with the mentos-soda reaction and its mechanics
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bookred
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I have noticed recently that when I pour coca-cola ( from a regular red can ) into a plastic cup then mix crown royal in it that this produces "eruptions", small streams of liquid shooting up from the surface of the drink. What is causing these? I have mixed drinks many times and never noticed this in any other combination
 
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This could be similar to the known mentos-soda reaction, where the gum arabic in the mentos react with the soda gas.
 

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