Lime
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Uses of limestone | blocks for buildings, lime for mortar, concrete
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| Who discovered concrete and when? | Romans, 200BC
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| Uses of gypsum | Plaster, stucco, sheetrock
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| When was plaster discovered? | ~7000BC
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| What family of minerals is gypsum from? | CaSO4
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| Anhydrite | CaSO4
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| Bassanite | CaSO4 . 1/2H2O aka plaster
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| gypsum | CaSO4 . 2H2O aka alabaster
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| How does gypsum become plaster? | Heated to 128C
CaSO4.2H20(s)=CaSO4
.1/2H20(s)+3/2H20(l)
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| Plaster becomes anhydrite at... | 168C
CaSO4.1/2H20(s)=CaSO4+1/2H20(l)
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| Anhydrite slowly reconverts to plaster... | CaSO4(s)+1/2H20(s)=CaSO4.1/2H20(s)
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| Plaster quickly reconverts to gypsum | CaS04.1/2H20(s)=CaS04.2H20(s)
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| Family of minerals that limestone is from... | CaCO3
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| calcite and aragonite | CaCO3 (atoms arranged slightly differently)
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| dolomite | CaCO3.MgCO3
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| Limestone comes from... | sediment, seashells, insoluble in water
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| Limestone to quicklime | CaCO3(s)=(burn)CaO(s)+CO2
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| Quicklime to slaked lime | CaO(s)+H2O(l)=Ca(OH)2(s)
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| slaked lime and carbonic acid | limestone
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| Carbonic acid | H2CO3
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| process schematic | go look, silly
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Created by:
Knaomi
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