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This is because the toothpaste has some amount of acid or alkaline in it .

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14y ago

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What colour would universal indicator turn if added to a toothpaste solution?

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.


What colour would universal indicator be in a strong alkali?

Universal indicator would be dark blue or purple in a strong alkali.


What colour would universal indicator turn in ethanol?

Universal indicator would likely turn red in ethanol, indicating that it is acidic.


What is colour of ethanol in universal indicator?

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.


What colour would an acid turn if mixed with water and universal indicator?

red


What colour does citric acid turn an universal indicator?

Citric acid is a weak acid, so it would turn a universal indicator to orange or red.


What colour would universal indicator turn in soil containing alkaline?

Universal indicator would turn blue or purple in soil containing alkaline.


What colour would universal indicator be in caustic soda?

Universal indicator would turn dark blue or purple in caustic soda, indicating a high pH level.


What is the colour of universal indicator solution in a neutral solution?

The Universal Indicator would go green which is pH 7.


What colour would ammonia gas turn universal indicator paper?

Ammonia gas would turn universal indicator paper blue or purple depending on the concentration of ammonia present.


What colour would orange juice be in Universal indicator?

Orange juice would be acidic in nature, so it would likely turn red or pink in Universal indicator due to its low pH level.


What colour should weak acid be in a universal indicator?

A weak acid would typically be a shade of orange or red in universal indicator, indicating a pH of around 4-6.