Just because it smells like bleach, that doesn't mean it's stronger than something that smells weaker.

Let me explain.
When them make bleach, they bubble chlorine gas through water, but they adjust the ph of the water to around 8.0, from a neutral 7.
They do this because chlorine gas is released from any solution that is more acidic then a ph of 8.
Therefore, if you add the tablet to straight water, it will release the chlorine gas from the solution until the other chemicals in the tablet adjust the ph to a proper level, or the chlorine does it for you.
This is why you can't mix bleach with acids, because the acid will lower the ph of the liquid to below 8, and the solution will begin releasing gas.
The released chlorine gas is not only very irritating, but also deadly in high enough concentrations. Bleach is also very corrosive to metals, and anything organic.
Does that make any sense?

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