It means that the substance tested is neutral.
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Universal indicator changes color based on the pH of a substance. Green color indicates a neutral pH (around pH 7), which means the solution is neither acidic nor alkaline. The indicator turns yellow in acidic solutions and blue to violet in alkaline solutions.
If it turns red, the substance tested is an acid. If it turns blue, the substance tested is an alkali.
The color of universal indicator solution in a neutral solution is green.
A neutral solution will turn universal indicator green.
Salt water typically forms a neutral pH solution, so it will likely appear green in universal indicator.
A salt solution with universal indicator will likely show a neutral pH, appearing green in color. This is because salts are typically pH-neutral compounds that do not significantly affect the acidity or alkalinity of a solution when dissolved in water.
The substance that turns a universal indicator green when in a pot is likely water. This is because pure water is neutral, with a pH of around 7, which is indicated by the color green on universal indicator.