Chemistry — The Limestone Cycle
Calcium carbonate, lime and limewater.
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digraph LimestoneCycle {
rankdir=LR;
node [shape=box, style=rounded];
"Limestone (CaCO3)" -> "Quicklime (CaO)" [label="heat (-CO2)"];
"Quicklime (CaO)" -> "Slaked lime (Ca(OH)2)" [label="+ water"];
"Slaked lime (Ca(OH)2)" -> "Limewater" [label="dissolve"];
"Limewater" -> "Limestone (CaCO3)" [label="+ CO2"];
}