Hazard Symbols, Acids And Alkalis Flashcards
1
Q
What is a base?
A
A substance with a pH greater than 7. An alkali is a base that dissolves in water.
Blue/purple
2
Q
What is a neutral substance?
A
A substance with a pH of 7
Green
3
Q
What does an acid and base react together to form?
A
Salt and water
4
Q
What are the products of an acid and base reaction?
A
Neutral, it’s called a neutralisation reaction
5
Q
What is the equation for any neutralisation reaction?
A
acid + base —> salt + water
6
Q
Neutralisation reactions can be used to make salts, what are some uses of salts?
A
Used in fertilisers - eg, ammonium nitrate, ammonium phosphate
Used in fireworks as colouring agents - eg, calcium chloride (orange colour), copper chloride (blue/green colour)
7
Q
What is an acid?
A
A substance with a pH less than 7.
Red/orange
