Acids in Food and Drink
What kind of flavor do acids give to food and drinks?
A sour taste
Which hazard symbol means “easily set on fire”?
Flammable
Which acid is found in vinegar?
Ethanoic acid (acetic acid)
Corrosive chemicals attack which types of materials?
Metals, stonework, and skin/tissue.
What is the name for anything that has the potential to cause harm?
A hazard
Name one common acid used to make fizzy drinks taste sharp.
Citric acid (or phosphoric acid)
Which symbol warns of damage to fish, plants, and animals in the environment?
Dangerous to the environment.
Which strong alkali is the main ingredient in drain cleaner?
Sodium hydroxide
What warning symbol is printed on bottles of concentrated hydrochloric acid?
Corrosive hazard symbol.
What is the safest way to reduce the strength of an acid?
Dilute it with water
Why can we safely drink acidic drinks even though they contain acids?
Because the acids are weak or very dilute
Which symbol warns that a substance might explode when heated?
Explosive
Name an acid that is used both in laboratories and in our stomachs.
Hydrochloric acid
Give two examples of things that can be destroyed by corrosive acids.
Metals and living tissue (stonework also acceptable).
Is the liquid in a car battery a pure substance or a mixture?
A mixture (sulfuric acid + water)
Which acid is used in soft drinks but must be transported in a diluted form for safety?
Phosphoric acid
Soap powder can irritate your skin. Which hazard symbol fits it best?
Caution
Which acid is present in the liquid inside a car battery?
Sulfuric acid
At what concentration does ethanoic acid stop being an irritant and become corrosive?
Above 25%
Name one common material that acids do NOT attack.
Plastic or glass
What health problem may develop if we consume too many acidic foods and drinks?
Tooth decay
Turpentine harms pond life, makes people sick, and burns easily. Which two hazard symbols are needed?
Toxic and Flammable
What can happen to human skin if strong acid is spilled on it?
Permanent burns or scarring
At what concentration does ammonia solution become corrosive instead of just an irritant?
Above 10%
Why do scientists often dilute acids and alkalis before using them in the laboratory?
To make them less harmful and easier to handle.