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Home / Science lessons / Making Limewater Solution
  • Making Limewater Solution

    Making Limewater Solution

    Limewater is used in many science experiments and is easy to make on your own.

    1. Put 1 teaspoon of calcium hydroxide in a clean glass jar, up to 1 gallon in size. (Limewater is a saturated solution, which means there will be some extra chemical that doesn't dissolve. A teaspoon will result in a fully saturated solution whether you use a gallon jar or a smaller one.)
    2. Fill the jar with distilled or tap water.
    3. Shake the jar vigorously for 1-2 minutes, then let it stand for 24 hours.
    4. Being careful not to stir up the sediment, pour the clearer solution off the top of the jar through a clean coffee filter or filter paper.
    5. Repeat the filtering step if necessary to obtain a clear limewater solution. Store in a clean jar or bottle.

    When carbon dioxide is bubbled into limewater, calcium carbonate (CaCO3) is produced. It precipitates out as a white suspended solid, making the solution appear cloudy.

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By: xena
Date: Mar 20, 2015

How much distilled water should i add to the teaspoon?

By: steve peacock
Date: Feb 22, 2015

... and if you carry on blowing CO2 into the cloudy solution, it will eventually go clear again !  (as the milky calcium carbonate turns to soluble calcium bicarbonate).

By: joel
Date: Feb 20, 2015

Look for pickling lime for calcium hydroxide I pick up it at our small grocery store we have in Erskine MN - 100% calcium hydroxide. I also ordered some Ca(OH) through *******

By: Tyler
Date: Feb 11, 2015

Where do you buy Ca(OH)2. I’ve never seen it at a grocery store.  And I work there.

By: john
Date: Jan 15, 2015

not helpful need facts on limewater good day

By: Alison
Date: Oct 03, 2014

this really helped me with my GCSE science homework. thank you so much!

By: Tunde Ogunsina
Date: May 24, 2014

your information is well readable and comrehended.thank very much.hope to read more.