This is because the toothpaste has some amount of acid or alkaline in it .
Universal indicator would turn dark blue or purple in caustic soda, indicating a high pH level.
The Universal Indicator would go green which is pH 7.
A Universal indicator is a pH indicator composed of a solution of several compounds that exhibits several smooth colour changes over a pH value range from 1-14 to indicate the acidity or basicity of solutions. A universal indicator is typically composed of water, propan-1-ol, phenolphthalein sodium salt, sodium hydroxide, methyl red, bromothymol blue monosodium salt, and thymol blue monosodium salt.
If universal indicator is added to water after a reaction with cesium, the solution would likely turn purple or dark blue. This is because cesium reacts vigorously with water to produce cesium hydroxide, which is a strong base. The formation of this alkaline solution raises the pH, causing the universal indicator to shift toward the color that corresponds to higher pH levels.
Yes it would
Universal indicator added to a toothpaste solution would likely turn a shade of blue or purple, indicating that the solution is basic due to the presence of substances like fluoride or calcium carbonate found in toothpaste.
Universal indicator would be dark blue or purple in a strong alkali.
Universal indicator would likely turn red in ethanol, indicating that it is acidic.
Universal indicator changes color in different pH ranges. In the case of ethanol, which is pH-neutral, universal indicator would likely show a green color.
red
Citric acid is a weak acid, so it would turn a universal indicator to orange or red.
Universal indicator would turn blue or purple in soil containing alkaline.
Universal indicator would turn dark blue or purple in caustic soda, indicating a high pH level.
The Universal Indicator would go green which is pH 7.
Ammonia gas would turn universal indicator paper blue or purple depending on the concentration of ammonia present.
Orange juice would be acidic in nature, so it would likely turn red or pink in Universal indicator due to its low pH level.
A weak acid would typically be a shade of orange or red in universal indicator, indicating a pH of around 4-6.