Acids in Food & Drink
How do acids in food and drink taste?
Sour
Which symbol shows a substance that catches fire easily?
Flammable
Vinegar contains which acid?
Ethanoic acid (acetic acid)
Corrosive substances attack which materials?
Metals, stonework, and skin
What is something that can cause harm called?
A hazard
Name an acid found in fizzy drinks.
Citric acid (also phosphoric acid)
Which hazard symbol means a substance can cause long-term damage to animals and plants?
Dangerous to the environment
Drain cleaner contains which corrosive alkali?
Sodium hydroxide
What label is on concentrated hydrochloric acid?
Corrosive hazard symbol
How can an acid be diluted?
By adding water
Why do acidic foods not carry hazard symbols?
Because the acids are too weak/dilute to be dangerous.
Which hazard symbol means heating may cause an explosion?
Explosive
Name an acid used in laboratories and everyday life.
Hydrochloric acid
Name two substances that can be attacked by corrosive acids.
Metals and tissue (stonework also acceptable)
Is car battery acid a pure substance or a mixture?
A mixture (sulfuric acid + water)
What acid is delivered to drink factories in concentrated form?
Phosphoric acid.
Soap powder irritates the skin. Which hazard symbol would it need?
Caution
Which acid is found in car batteries?
Sulfuric acid
Above what percent is ethanoic acid corrosive?
Above 25%
Name one substance NOT attacked by a corrosive acid.
Plastic or glass
What can too many acidic foods and drinks cause over time?
Tooth decay
Turpentine damages pond life, causes sickness, and catches fire. Which two hazard symbols apply?
Toxic and Flammable
What may happen if you spill acid on your skin?
Permanent scarring or tissue damage
What percent solution of ammonia in water is corrosive?
Above 10%
Why must acids and alkalis in the lab often be diluted?
To make them less dangerous