Acids and Alkalis Flashcards
What does the hazard corrosive mean?
Capable of destroying solid materials.
Which of these acids is most likely to be dangerous?
Citric acid
Carbonic acid
Hydrochloric acid
Hydrochloric acid is the most likely to be dangerous.
Which statement about alkalis is true?
They are all bases
They cannot neutralise acids
They are all insoluble
Alkalis are all bases.
What name is given to a hazardous substance that can burn through skin and other substances?
Toxic
Irritant
Corrosive
Substances that can burn through other substances are called corrosive.
Which of these is not a base?
Copper oxide
Sodium hydroxide
Sulfur dioxide
Sulfur dioxide is an acid, not a base.
What sort of substance is found in many medicines to cure indigestion?
Bases are used to neutralise acid indigestion.
What name is given to a reaction in which an acid and base react with each other?
Acids react with bases in a neutralisation reaction
Which is a source of naturally occurring acids?
Lemons contain citric and ascorbic acids.
What sort of chemical is found in many household cleaning products, like bleach and oven cleaner?
Alkalis are found in many household cleaners.
What happens to litmus paper in acidic solutions?
Blue litmus paper turns red in an acidic solution.
Universal indicator solution is usually green to begin with. What does this mean?
Green indicates that universal indicator solution is neutral.
A liquid has a pH of 8. What does this mean?
A pH above 7 means that the liquid is alkaline.
A liquid has a pH of 1. What does this mean?
A pH of 1 means that the liquid is strongly acidic.
Which acid could be used to make ammonium nitrate (a type of fertiliser)?
Nitric acid could be used to make ammonium nitrate.
Farmers use lime to neutralise their acidic soils. What sort of substance is lime?
Lime is a base.
Which salt is made when copper oxide and sulfuric acid react together?
When copper oxide and sulfhuric acid react together, copper sulfate is formed.
What products are formed when a metal oxide reacts with an acid?
A salt and water are formed when a metal oxide reacts with an acid.
What products are formed when a metal carbonate reacts with an acid?
When a metal carbonate reacts with an acid, a salt, water and carbon dioxide are formed.
What is the name of the salt made from nitric acid and potassium hydroxide?
Potassium nitrate is the salt made in this reaction.
