Second day: We compare the two bottles.
-That was in the dark: On the surface had algae, black spots
all over the body of the bottle because of the precipitation of calcium sulfate
and lower spot black greater, due to which there was more concentration of
calcium sulfate.
-That was in the light: All exactly alike, but all
over the body os the bottle, also appear orange zones due to the presence of
anaerobic bacteria.
(Darkness: Left)
(Light: Right)
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