Acids and alkalis Flashcards
1
Q
What is an indicator?
A
It’s a dye that changes colour in acidic and alkaline solutions
2
Q
What is it called when a substance changes state from more ordered to less ordered?
A
Endothermic change of state
3
Q
What is it called when a substance changes state from less ordered to more ordered?
A
Exothermic change of state
4
Q
What is neutralisation?
A
It’s a chemical reaction where an acid reacts with an alkali to get closer to pH 7
5
Q
Is rain more acidic or alkaline?
A
It’s more acidic
6
Q
How do you test for Co2?
A
Bubble gas through limewater. If it turns cloudy it’s Co2
7
Q
How do you test for H?
A
Hold gas tube over lighted splint. If there’s a squeaky pop it’s H
8
Q
How do you test for O2?
A
Place smoldering splint inside gas tube. If it relights it’s O2
