how to make lime water
How to Make Limewater
Limewater is a solution of calcium hydroxide in water. This article tells you how to make it and also gives you some applications of the same.
- Limewater has an earthy smell
- It tastes of calcium hydroxide (bitter).
- 1 teaspoon of calcium hydroxide (slaked lime)
- ½ Jar of Water
- Pour in 1 teaspoon of slaked lime into a jar filled with water and place a cover on the jar.
- Shake it thoroughly. At first, shake for a minute or two and then allow the mixture to stand for 24 hours.
- After the given period, pour the solution into another container. Do not stir the sediments vigorously.
- The clearer solution must be stored into a clean bottle or jar until its next use.
- Calcium hydroxide in lime water reacts with carbon dioxide to give calcium carbonate which forms an insoluble suspension in the solution. This property makes limewater useful in detecting the presence of carbon dioxide. A simple experiment that demonstrates this reaction is to exhale into limewater and observe the change in its color. The carbon dioxide breathed out reacts with calcium hydroxide to form calcium carbonate. And the solution becomes cloudy.
- Waste containing sulfur dioxide is treated with limewater to remove the toxic sulfur dioxide from it. Calcium hydroxide in limewater reacts with sulfur dioxide to give calcium sulfite as a precipitate.
- Lime water finds applications in cooking. In making tortillas, it is used for soaking maize. In the process, vitamin B and amino acid trytophan are liberated. Soaking in lime water also causes the kernels' skin to peel off.
- Lime water is used as a color solvent in fresco painting. Painting is done on wet plaster with the use of pigments dissolved in limewater.
- Organisms in reef tanks consume calcium from water. Limewater is added to the tanks to restore the lost calcium.