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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: emm on May 09, 2005, 09:11:50 AM

Title: ClO2
Post by: emm on May 09, 2005, 09:11:50 AM
I would appreciate if somene can answer me can ClO2 destroy protoza, Ciliata, Nematoda, Oligochaeta, Nais sp. ).
Thx.
Title: Re:ClO2
Post by: Donaldson Tan on May 09, 2005, 03:25:37 PM
are those organisms fungi? ClO2 is a pretty strong oxidising agent. Perhaps..
Title: Re:ClO2
Post by: emm on May 10, 2005, 04:41:34 AM
One of them are worms and they are breathing through all surface of his body. Is it possible to destroy with ClO2 this kind of organisms?
Title: Re:ClO2
Post by: GCT on May 10, 2005, 12:34:58 PM
Well, i imagine so, try pouring some of it over your own skin ;)
Title: Re:ClO2
Post by: Donaldson Tan on May 12, 2005, 03:10:54 AM
i would suggest you to experiment with one worm.
Title: Re:ClO2
Post by: GCT on May 12, 2005, 12:23:29 PM
That would be pretty cruel, I'm almost positive that Cl02 will kill the worm, it is a fairly strong agent, what's the formula for bleach by the way?
Title: Re:ClO2
Post by: jdurg on May 12, 2005, 12:47:52 PM
Bleach is a solution of sodium (or calcium depending on your location) hypochlorite.

Sodium hypochlorite is NaOCl.
Calcium Hypochlorite is Ca(OCl)2.

In either case, the active compound is the hypochlorite ion ClO-.  

Bleach also has some sodium hydroxide in there to keep the pH at an elevated level since sodium hypochlorite is formed by the action of chlorine gas on some sodium hydroxide.  At low pH, the equillibrium is in favor of chlorine gas and NaOH.  At high pH, the equillibrium rests on the side of sodium hydroxide.

So in a typical bottle of Chlorine Bleach, you have mostly water with about 5% on average sodium hypochlorite, some sodium chloride, and some sodium hydroxide.
Title: Re:ClO2
Post by: corey2 on May 12, 2005, 07:03:06 PM
ClO2 is an unstable gas, very reactive at light, "normal" valence numbers for chlorine are +-1,+3,+5,+7: in ClO2 the valence number for chlorine is +4
I think it's a chlorinating agent, as IO2 and ICl2 are Iodinating agents.

More information for "reactivity" with lifeforms:
http://www.epa.gov/pesticides/factsheets/chemicals/chlorinedioxidefactsheet.htm
Title: Re:ClO2
Post by: hmx9123 on May 12, 2005, 10:54:44 PM
Tyson (the chicken company) uses ClO2 for decontaminating and sterilizing their chickens before shipment.  So, yes, it's an incredibly powerful fungicide/germicide/viricide.
Title: Re:ClO2
Post by: NotAChemistYet on May 13, 2005, 07:56:56 PM
Quote from: emm on May 09, 2005, 09:11:50 AM
I would appreciate if somene can answer me can ClO2 destroy protoza, Ciliata, Nematoda, Oligochaeta, Nais sp. ).
Thx.
It will kill them all.