0
Cool as a cucumber for texting :-)
caac
It means 'Cool as a cucumber'
By caac pipi chorro
CaCO3 (calcium carbonate) is a mild base, and as such reacts to neutralise acids.
Vinegar is a dilute solution of acetic acid (AcH).
CaCO3 + 2AcH --> H2O + CO2 + CaAc