5.7 Neutralisation And The pH Scale Flashcards
1
Q
Alkalis def
A
A base that dissolves in water
2
Q
Bases def
A
The oxide, hydroxide, or carbonate of a metal that will react with an acid, forming a salt as one of the products
3
Q
Acids def
A
When dissolved in water, its solution has a pH value less than 7. Acids are proton (H+ ion) donors
4
Q
Neutral def
A
A solution with a pH of 7 which is neither acidic nor basic
5
Q
pH def
A
A number which shows how strongly acidic or alkaline a solution is
6
Q
Example of alkalis
A
- soluble hyrdroxides
- eg sodium hydroxide
7
Q
Examples of bases
A
- metal oxides and hydroxides
- eg ion and copper hydroxide, that are insoluble in water
8
Q
What makes a solution acidic
A
- acids release H+ ions into a solution when added to water
- these excess H+ ions make the solution acidic
9
Q
What makes a solution alkaline
A
- all alkalis form aqueous hydroxide ions, OH-(aq), when added to water
- these excess aqueous hydroxide ions make a solution alkaline
10
Q
What are the ways to measure pH and which one is best?
A
- litmus paper
- universal indicator
- pH probe and meter: best bc it is most accurate
11
Q
What does the pH scale go to
A
From 0 to 14
