Food coloring, and other dyes.
copper blue macke make water blue because the die from the macke spreds through the water causing it to turn blue
It chemically reacts to the tap water, so the green in iodine, reacts violently and causes a mixture according to make it blue.
Yes it does turn blue in water, it dissolves blue.
No it does not.
because when in a solution it forms blue crystals creating a blue colour
water
Chlorine does not make your pee turn blue it makes you have diaria
Any water soluble blue salt (and which does not react with water) can turn the solution blue. For example = Copper(II) sulfate[CuSO4], Oxovanadium(IV) sulfate[VOSO4], Copper(II) nitrate[Cu(NO3)2], etc.
Blue, no. White, yes.
You could add blue food coloring, or you can make the container holding the water blue.
Food coloring, and other dyes.
blue