S3 - pH (up to Acids in Food Industry)

What colour would universal indicator be when mixed with a strong acid?

• Blue

• Red

• Green

• Purple

What colour would universal indicator be when mixed with a strong alkali?

• Blue

• Red

• Green

• Purple

What colour would universal indicator be when mixed with a distilled water?

• Blue

• Red

• Green

• Purple

What colour would universal indicator be when mixed with a weak alkali?

• Blue

• Red

• Green

• Purple

Universal indicator, when mixed with a strong acid, turns ___ in colour.

What pH is a strong alkali?

• pH 1

• pH 5

• pH 7

• pH 9

• pH13

What pH is a strong acid?

• pH 1

• pH 5

• pH 7

• pH 9

• pH13

What pH is a neutral?

• pH 1

• pH 5

• pH 7

• pH 9

• pH13

What pH is a weak alkali?

• pH 1

• pH 5

• pH 7

• pH 9

• pH13

What pH is a weak acid?

• pH 1

• pH 5

• pH 7

• pH 9

• pH13