S1 U7 Acids and Alkalis

Medicine used to neutralize stomach acid when having indigestion.

• antacid

• nicotine

• caffeine

• lime

Is it acid or alkali when the pH is 4 pH

• Acid

• Alkali

• Neutral

The other name of alkali is basic

• True

• False

What is the meaning of the above hazard warning symbol?

• Corrosive

• Explosive

• Toxic

• Radioactive

What does it mean when a substance has the warning label shown?

• It can catch fire easily.

• It may explode.

• It can poison you.

• It is radioactive.

What does it mean when a substance has the warning label shown?

• It can catch fire easily.

• It may explode.

• It can poison you.

• It is radioactive.

What does it mean when a substance has the warning label shown?

• It can catch fire easily.

• It may explode.

• It can poison you.

• It is radioactive.

What does it mean when a substance has the warning label shown?

• It can catch fire easily.

• It may explode.

• It can poison you.

• It can cause harm

What does it mean when a substance has the warning label shown?

• It can catch fire easily.

• It may explode.

• It can cause fire when in contact with other substances.

• It can cause harm

Reaction between acid and alkali producing salt and water:

• Combustion

• Neutralization

• Precipitation

• Decomposition