Properties of Water Flashcards
What term best explains water droplets being formed by water molecules being attracted to each other?
Cohesion
What property allows water to stick to the sides of a straw?
Adhesion
What property of water allows bugs to walk on water?
Surface tension
Water takes ________________ heat to change to its gaseous state
Large amounts of
What property of water allows sweat to cool the body & coastal cities to have more moderate temperatures than inland cities?
High heat capacity
A solution with a pH of 3 is:
Acidic
A solution with a pH of 8 is:
Basic
Why is water a polar molecule?
One side of the molecule has a slight positive charge, and the other side has a slight negative charge
Which side of the water molecule has a slight negative charge?
The oxygen side
What type of bond exists between the hydrogen and oxygen atoms?
Covalent bonds
What type of bond is formed between water molecules?
Hydrogen bonds
Why does surface tension and capillary action occur in water?
Because it has hydrogen bonds
What kinds of substance can dissolve in water?
Polar molecules
What needs to be true for a neutral solution?
H+ needs to be equal to OH-
What needs to be true for a basic solution?
OH- needs to be greater than H+
What percent of the Earth’s surface is covered in water?
72%
What percent of water is salt water?
97%
Where is most fresh water found?
Glaciers and ice caps
Evaporation
Liquid water on Earth’s surface changes into water vapor in the atmosphere
Sublimation
Snow or ice on Earth’s surface changes directly into water vapor in the atmosphere
Transpiration
Plants give off liquid water, most of which evaporates into the atmosphere
Condensation
Water vapor in the atmosphere changes to liquid water droplets, forming clouds or fog
Precipitation
Water droplets in clouds are pulled to Earth’s surface by gravity, forming rain, snow, or other types of falling moisture
What are the freezing and boiling points of water?
0 degrees Celsius/32 degrees Fahrenheit and 100 degrees Celsius/212 degrees Fahrenheit
What is the chemical equation for an anabolic reaction?
6CO2 + 6H2O + energy = C6H12O6 + 6O2
What is the chemical equation for a catabolic reaction?
C6H12O6 + 6O2 = 6CO2 + 6H2O + energy
What is the pH of water?
7
If a substance is more acidic, does it have a pH higher or lower than 7?
Lower
