Acids and Alkalis Flashcards Preview

Year 9 revision Chemistry > Acids and Alkalis > Flashcards

Flashcards in Acids and Alkalis Deck (19)
Loading flashcards...
1
Q

What does the hazard corrosive mean?

A

Capable of destroying solid materials.

2
Q

Which of these acids is most likely to be dangerous?
Citric acid

Carbonic acid

Hydrochloric acid

A

Hydrochloric acid is the most likely to be dangerous.

3
Q

Which statement about alkalis is true?

They are all bases

They cannot neutralise acids

They are all insoluble

A

Alkalis are all bases.

4
Q

What name is given to a hazardous substance that can burn through skin and other substances?

Toxic

Irritant

Corrosive

A

Substances that can burn through other substances are called corrosive.

5
Q

Which of these is not a base?
Copper oxide

Sodium hydroxide
Sulfur dioxide

A

Sulfur dioxide is an acid, not a base.

6
Q

What sort of substance is found in many medicines to cure indigestion?

A

Bases are used to neutralise acid indigestion.

7
Q

What name is given to a reaction in which an acid and base react with each other?

A

Acids react with bases in a neutralisation reaction

8
Q

Which is a source of naturally occurring acids?

A

Lemons contain citric and ascorbic acids.

9
Q

What sort of chemical is found in many household cleaning products, like bleach and oven cleaner?

A

Alkalis are found in many household cleaners.

10
Q

What happens to litmus paper in acidic solutions?

A

Blue litmus paper turns red in an acidic solution.

11
Q

Universal indicator solution is usually green to begin with. What does this mean?

A

Green indicates that universal indicator solution is neutral.

12
Q

A liquid has a pH of 8. What does this mean?

A

A pH above 7 means that the liquid is alkaline.

13
Q

A liquid has a pH of 1. What does this mean?

A

A pH of 1 means that the liquid is strongly acidic.

14
Q

Which acid could be used to make ammonium nitrate (a type of fertiliser)?

A

Nitric acid could be used to make ammonium nitrate.

15
Q

Farmers use lime to neutralise their acidic soils. What sort of substance is lime?

A

Lime is a base.

16
Q

Which salt is made when copper oxide and sulfuric acid react together?

A

When copper oxide and sulfhuric acid react together, copper sulfate is formed.

17
Q

What products are formed when a metal oxide reacts with an acid?

A

A salt and water are formed when a metal oxide reacts with an acid.

18
Q

What products are formed when a metal carbonate reacts with an acid?

A

When a metal carbonate reacts with an acid, a salt, water and carbon dioxide are formed.

19
Q

What is the name of the salt made from nitric acid and potassium hydroxide?

A

Potassium nitrate is the salt made in this reaction.