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Old 08-01-2017, 10:13 AM
 
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Fill one with water and another with a little bit of liquid bleach. Don’t fill the bleach beaker too much, as you will only need a few drops of the bleach.
Add food coloring drops to the beaker that contains water.
Fill an eye dropper with liquid bleach and drip it into the food-coloring beaker, one drop at a time. Stir with the glass stirrer, or let the bleach disperse, and continue to drop liquid bleach until the color is completely gone.
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That does not work. We used ounces of bleach not a couple drops.
The food coloring was green and the Bleach (citrus) did nothing but change the green colored water to blue colored water.

Would iodine in the water work whereas the food coloring failed?

We need to use bleach to make clear > colored water. Thanks.
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Old 08-02-2017, 01:23 AM
 
Location: Myrtle Creek, Oregon
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How long did you give the bleach to work? Like disinfecting water, the longer the bleach is in the water the less bleach it takes. Bleach also is not stable, so buy fresh bleach for your project.

Some color (silt) remains after filtering my well water through a 1 micron filter. The standard disinfecting chlorination of 1 cup bleach to 2500 gallons of water takes about 5-7 days to clear the color.
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Old 08-02-2017, 08:22 AM
 
Location: Baker City, Oregon
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Quote:
Originally Posted by howard555 View Post
.......
The food coloring was green and the Bleach (citrus) did nothing but change the green colored water to blue colored water.
.............[/i] Thanks.
The green food coloring was probably a mixture of yellow and blue dyes.

Bleach works by oxidation.

In your case the bleach probably oxidized the yellow dye but not the blue.

Not all dyes can be oxidized and are impervious to bleach. Perhaps the blue is one of them.

Last edited by karlsch; 08-02-2017 at 08:31 AM..
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Old 08-04-2017, 01:02 PM
 
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We tried again with the green food coloring and new bleach. It did not turn blue but did not fully dilute the green and it took awhile. It left a yellow tint to the water. The demonstration was to have clear water as the result. Walmart only had one type of iodine (which some people say is better to use than food coloring) but it is "de-colorized" iodine.
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Old 08-05-2017, 11:58 AM
 
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Iodine worked great. It's color was gone in seconds once the bleach was added.
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