Difference between quick lime, slaked lime, lime water and soda lime

The chemicals "quick lime", "slaked lime", "lime water" and "soda lime" all have "lime" in common. What is the difference between them?

• Aha, I wondered if this would be a self-answer -- most or all of this is on Wikipedia. – hBy2Py Jan 21 '17 at 16:00

Quick lime is calcium oxide, $\ce{CaO}$, in the solid state.

Slaked lime is calcium hydroxide, $\ce{Ca(OH)2}$, in the solid state.

Lime water is a dilute solution of calcium hydroxide, $\ce{Ca(OH)2}$, in water.

Soda lime is a mixture of sodium hydroxide, $\ce{NaOH}$, (also known as caustic soda) and calcium oxide, $\ce{CaO}$, (also known as quicklime).

• Thanks for posting this! Can you add links to Wikipedia or elsewhere? Most of these are on Wik. – hBy2Py Jan 21 '17 at 16:01
• @hBy2Py, I did not refer to wikipedia. I knew this. – MrAP Jan 21 '17 at 16:02
• You may know these things, but including links to outside sources increases the usefulness of your answer to others. – Ben Norris Jan 21 '17 at 17:36
• Slaked lime comes from the idea of slaking the "thirst" of quick ("live" or "active") lime with water. Sort of an alchemical etymology. – James Gaidis Aug 4 at 14:39

To add to the family of materials in the 'lime' category: The sedimentary rock limestone is composed of calcium carbonate, $\ce{CaCO3}$.

According to Wikipedia:

Quick lime is $\ce{CaO}$ (calcium oxide)
Slaked lime is $\ce{Ca(OH)2}$ (calcium hydroxide)
Lime water is just a dilute solution of calcium hydroxide.
Soda lime is a mixture of about 75% calcium hydroxide, a few percent each of sodium hydroxide and potassium hydroxide, and about 20% water. It is commonly used to adsorb $\ce{CO2}$ from the air.