Lesson 4 - pH and carbon dioxide Flashcards
1
Q
Sum of CO2 =
A
CO2 + H2CO3 + HCO3- + CO32-
2
Q
What is buffering?
A
A buffered solution resists changes in pH when it is diluted or acid and bases are added
3
Q
What do buffered solutions contain?
A
Weak acid/base and its salt
4
Q
Calcium Carbonate formula equation
A
Ca2+ + CO32- <-> CaCO3
5
Q
What happens to to calcium carbonate under acidic conditions
A
Begins to dissolve as it reacts with hydrogen ions
6
Q
Name two crystalline forms of calcium carbonate (2)
A
calcite and argonite
7
Q
Which is more stable of calcium carbonates crystalline forms?
A
Calcite
8
Q
What is the Carbonate Compensation Depth?
A
Where shells will completely dissolve by due to lower pH and pressure
