Acid, Bases and salts

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

What pH range would you get for an acid?

• 0-6

• 7

• 7-14

• 2-10

Alkalis feel...

• Rough

• Granulated

• Soapy

• Smooth

Which pH level indicates a strong alkali?

• 1-3

• 4-6

• 8-11

• 12-14

Acid in vinegar:

• Hydrochloric acid

• Sulfuric acid

• Acetic acid

• Carbonic acid

Salt water did not react with the Red or Blue litmus paper.  This must mean

• Salt water is a Base
• Salt water is an Acid
• Salt water is neutral
• Salt water is charged

Which of the following is a base?

• orange juice
• water
• vinegar
• dishwashing detergent

Identify the acid present in tamarind.

• Tannic acid

• Lactic acid

• Tartaric acid

• Citric acid

Evidence of a chemical reactions is anything that shows -

• a new substance has formed

• a solid dissolved in a liquid

• interaction between 2 gases

• a change in the state of matter

Which is NOT an indication of a chemical change?

• temperature change

• formation of a precipitate

• shape change

• production of light