Food coloring, and other dyes.
When copper reacts with water, it forms copper hydroxide which has a blue color. This is why when copper objects such as pipes or fittings corrode, the water turns blue due to the presence of copper hydroxide in the water.
Soap does not turn water blue. It is likely that a blue-tinted soap was used, or that the soap contained a dye or pigment that resulted in the blue color when dissolved in the water.
No it does not.
because when in a solution it forms blue crystals creating a blue colour
Chlorine does not make your pee turn blue it makes you have diaria
water
Blue, no. White, yes.
The litmus paper will turn blue if dipped in lime water, indicating that the lime water is basic. Lime water is a solution of calcium hydroxide, which is a strong base that can turn litmus paper blue.
You could add blue food coloring, or you can make the container holding the water blue.
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blue
Food coloring, and other dyes.