Assessment 2 Science

What are Alkalis (bases)?

• often have a sour taste

• often are soapy (slippery) and have a bitter taste.

Examples for alkalis

• Soap

• tea

• vinegar

• sodium hydroxide

• potassium hydroxide

what does this symbol represent?

• toxic

• irritant

• flammable

• harmful to the environment

what does this symbol mean?

• harmful

• corrosive

• explosive

• flammable

what's the difference between these two symbols?

• there is no difference.

• both of them are the same.

• the first one is irritant and the second is harmful.

what are acids?

• often have a sour taste

• often are soapy (slippery)

examples of acids:

• vinegar

• batteries

• sodium hydroxide

this is the experiment we did.

• ..........

• ..........

what is this called?

• a ph scale

• a rainbow

• a nail polish

What does pH stand for?

• power of height

• power of hydrogen

• power of nothing