Module 6 - Aqueous Geochemistry 1 Flashcards
1
Q
7 Weird Properties of water - Dissolving ability
A
- Ability to break ionic bonds, liberating ions
- Dissolves more species and in greater quantity than any other common liquid
2
Q
7 Weird Properties of water - Heat Capacity
A
- Amount of energy needed to raise temperature of substance by 1 K
- Highest of all common liquids and solids
3
Q
7 Weird Properties of water - Latent Heat of Fusion
A
- Energy needed to melt ice to water
- Highest of all common liquids and solids
4
Q
7 Weird Properties of water - Latent heat of vaporization
A
- Energy needed to evaporate liquid water to gas
- Highest of all common substances
5
Q
7 Weird Properties of water - Latent heat of sublimation
A
- Energy needed to sublimate ice to vapour
-Also very high
6
Q
7 Weird Properties of water - Number of phrases present on Earth’s surface
A
All 3, unlike any other natural substance
7
Q
7 Weird Properties of water - Density vs temp relationship
A
Only liquid that’s densest as liquid, not solid
8
Q
7 Major ions in water
A
- Na+ (Evaporite weathering)
- Mg2+ (Silicate Weathering)
- Ca2+ (Carbonate Weathering)
- K+ (Silicate Weathering)
- HCO3- (Carbonate Weathering)
- Cl- (Evaporite Weathering)
- SO42- (Pollution)
9
Q
Charge Balance
A
Normality (meq/L) = Molarity (mmol/L) * charge of ion (meq/mmol)
10
Q
Water Hardness
A
- Measures the ability of relatively insoluble minerals to precipitate out of water
- less than 1.0 grains per gallon (soft)
- more than 7.0 grains per gallon (hard)
11
Q
Nutrients
A
- Major nutrients are dissolved nitrogen and dissolved phosphorus
- Aquatic life depends on dissolved nutrients to grow
- Nutrient Concentrations typically low in pristine environments
- Compare nutrients in water to Redfield ratio to determine which nutrient is limited
- If N:P is greater than 16, P is limited
- If N:P is less than 16, N is limited
12
Q
Turbidity
A
A measure of water clarity, measured by light penetration
