pH Levels Flashcards
1
Q
Define amphoteric
A
A compound able to react both as a base and as an acid
2
Q
Describe and explain bases using the Arrhenius model
A
A solution has a pH value of above 7 which produces hydroxide ions (OH-)
Not all bases dissolve in water, except for an alkaline which is a base that is soluble in water
- All alkalis are bases, but not all bases are alkaline
3
Q
Describe and explain acids using the Arrhenius model
A
Substances with a pH value below 7 which ionise in solution to produce hydrogen ions (H+)
They are considered strong if they ionise almost completely and weak if they ionise only slightly
4
Q
Describe the properties of a base
A
- Bitter taste
- Feel slippery in aqueous solution
- Conduct electricity in solution (not all bases are soluble)
- Turn red litmus paper blue
- Neutralises acids to form a salt plus water
5
Q
Describe the properties of an acid
A
- Sour taste
- Sting or burn the skin
- Conduct electricity in solution
- Turn blue litmus paper red
- Neutralises bases to form a salt plus water
