Acid Base Indicators

Change in colour in an acid and a base depends on the type of indicator.

• True

• False

Substances which are bitter in taste and feel soapy in texture are known as

• Bases

• Acid

Acids turn ____________ and Bases turn_____________.

• Both turn red litmus blue

• Blue litmus red, Red litmus blue

• Both turn blue litmus red

• No change

If an indicator gives changes colour with a acid it does not change colour with an acid.

• True

• False

Tags

NGSS.MS-PS1-2

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:

• pink and colourless

• blue and red

• red and blue

• colourless and pink

Tags

NGSS.MS-PS1-2

Which of the following is an acid-base indicator?

• Vinegar

• Baking soda

• Turmeric

• Lime water

Methyl orange is an _________

• acid

• indicator

• base

Tastes Sour

• Acids

• Bases

• Salts

• All

Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.

• purple

• red

• blue

• pink

What was red cabbage juice used as in the lab we performed?

• as an acid

• as a base

• as a colorant

• as an indicator