Chapter 2 Acis And Alkalis Flashcards
Q1 What acid is found in vinegar?
Ethanoic acid is found in vinegar.
Q2 How is acid rain formed and what are the disadvantages of it?
Acid rain is formed when c02 dissolves in to the rain water the disadvantages are pollution, deforestation and decay of limestone.
Q3 Are all acids harmful?Explain?
No not all acids are harmful like hydrochloric is but citric acid isn’t.
Q4 Why are hazard symbols useful?
They are because they break the language barrier.
Q5 What colour does litmus turn is acid and then in alkali?
It turned red in acid but blue in alkali.
Q6 What would you do if you spilt a concentrated acid on your arm?Why?
You would pour cold water on my arm to dilute the acid.
Q7 What happens when a strong acid is mixed with a strong alkali?
Neutralisation takes place.
Q8 What acid is found in your stomach?
Hydrochloric acid is found in your stomach.
Q9 What acid is found in fruits?
Citric acid is found in fruits.
Q10 Is battery acid harmful and what ph could it be?
Yes it is very harmful and its ph value would be 1 or 2.
Q11 How many variables can be changed in a scientific discovery?
Only two variables can be changed in a scientific discovery other wise it is no use because no one can test on it. And it isn’t a scientific discovery.
Q12 Name the five hazard symbols we have looked at in this topic?
The hazard symbols we have looked at are corrosive, harmful, irritant, highly flammable and toxic.
Q13 In the first practical in this topic what was are indicator?
In the practical are indicator was red cabbage.
Q14 What colour did the cabbage turn in alkali then in acid?
The cabbage turned red in acid and a slimy green colour in alkali.
Q15 What are the dangers of these chemicals?
The dangers are that it doesn’t tell us how weak or strong it is.
