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WorksheetsIntroduction to Water Chemistry
Total questions: 18
Worksheet time: 15mins
What is the chemical formula of water?
H2O
CO2
O2
NaCl
What property of water makes it an excellent solvent for many materials?
High heat capacity
High surface tension
High heat of vaporization
Polar structure
Which property of water makes it an excellent solvent for many materials?
Polar nature
Colorless
Odorless
Tasteless
Why can ice float on liquid water?
Ice has a tetrahedral structure
The density of ice is lower than the density of liquid water
Hydrogen bonds between ice molecules are weaker
Ice has a higher dielectric constant
Which property of water helps control droplet and surface phenomena?
High dielectric constant
High surface tension
High heat of vaporization
Excellent solvent
How is the charge of a water molecule on the two hydrogen atoms side?
Positive
Negative
Neutral
Variable
How is the charge of a water molecule on the oxygen atom side?
Positive
Negative
Neutral
Variable
What is Henry's Constant used to describe?
Decomposition of organic compounds in water
Relationship between dissolved gas concentration and its partial pressure
Complexation between metal ions in water
Change in water temperature with depth
Which atom in the structure of liquid water, at the interface with air, is oriented towards the interface?
Hydrogen
Oxygen
Undetermined
Both hydrogen and oxygen
In natural water, which ion plays an important role in the pH buffering system?
SO₄²⁻
Cl⁻
C. HCO₃⁻
K⁺
When water changes from ice to liquid, it:
consumes energy
releases energy
has no energy exchange
undetermined
When water changes from liquid to ice, it:
consumes energy
releases energy
has no energy exchange
undetermined
When water changes from liquid to vapor, it:
consumes energy
releases energy
has no energy exchange
undetermined
When water changes from vapor to liquid, it:
consumes energy
releases energy
has no energy exchange
undetermined
Which has a larger volume: 1 kg of liquid water or 1 kg of ice?
liquid water
ice
equal
undetermined
Why does 1 kg of ice have a larger volume than 1 kg of liquid water?
because the density of ice is lower than the density of liquid water
because the density of ice is higher than the density of liquid water
because the temperature of ice is lower than the temperature of liquid water
because the specific gravity of ice is higher than the specific gravity of liquid water
The concentration of solute in water is 0.05 mg/g. Convert this concentration unit to ppm.
5 ppm
50 ppm
500 ppm
5000 ppm
The concentration of solute in water is 0.5 mg/kg. Convert this concentration unit to ppb.
5 ppb
50 ppb
500 ppb
5000 ppb
