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After water is boiled, a white residue will form at the bottom. What is the cause for this?

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This is just the natural calcium and magnesium salts (carbonates) coming out of solution. You must be living in an area with 'hard' water, so perhaps an area with chalk or limestone geology. There is no health risk associated with hard water. Regards Harriette

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Thank you, Harriette for your comment..............

Mega Ganeshan gravatar imageMega Ganeshan ( 2014-01-21 23:21:44 -0500 )edit
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The carbonate residue (also known as "furring") occurs in most hot water systems and if allowed to build up too much makes the heating process very inefficient. It can be removed from cooking or heating utensils by soaking in a weak vinegar or lemon/ orange juice solution overnight - and rinsing well afterwards! Regards, Leigh

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Thank you......................

Mega Ganeshan gravatar imageMega Ganeshan ( 2014-01-21 23:21:55 -0500 )edit
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Asked:
2013-12-17 05:53:46 -0500
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Jan 14 '14