10 C - Natural Indicators

What did the change in color of the paper indicate about the solution?

• The solution was a salt

• The solution was basic

• The solution was acidic

• The solution was neutral

What is the yellow paper an example of?

• An indicator

• A chemical reaction

• A pH scale

• A solute

What substance is applied to the blotting paper to make it an indicator?

• Baking soda

• Vinegar

• Turmeric

• Lemon juice

What color does turmeric turn when it comes into contact with a basic solution?

• Yellow

• Red

• Green

• Blue

What happens when acids are tested with turmeric?

• It turns red

• It turns green

• It turns blue

• No color change

Why is turmeric considered an excellent indicator?

• Because it is readily available

• Because it changes color with temperature

• Because it helps differentiate between acids and bases without tasting

• Because it can detect the presence of water