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Worksheetshydrogeochemistry
Total questions: 10
Worksheet time: 20mins
What two minerals are primarily responsible for producing hard water?
Magnesium and potassium
Calcium and magnesium
Calcium and iron
Magnesium and iron
Which of the following types of water is most likely to contain the highest amount of dissolved minerals?
Rainwater that has just reached the Earth's surface
Rainwater before it reaches the Earth'ssurface
Groundwater located in a deep aquifer
Groundwater located within shallow soil
What is the most common element in the continental crust?
Si
O
Fe
Ca
What is the meaning of "Electroneutrality"
There are no any cations or anions in a solution
sum of positive charges = sum of negative charge
mole of anions = mole of cations
all are correct
what is the definition of "neutral solution" ?
deionized water
pH = 7
concentration of hydrogen ion =hydroxide ion
all are correct
what is the oxidation number of "S" in SO4
-2
-4
+6
+2
Stalactites and stalagmites in caves are mostly composed of
halite
alkali feldspar
calcite
quartz
Which of the following can contaminate an aquifer?
gas stations
landfills
agricultural regions
all of these
What can happen when CO2 is removed from "soda water" ?
pH increase
precipitation of some metals
The water will be more basic
all are correct
If water temperature goes UP, what happens to the level of Dissolved oxygen?
It goes up
It stays the same
It goes down
It increases exponentially
