Water Flashcards
Why is the polarity of water molecules important?
Allows them to form hydrogen bonds with each other
Why is cohesion important for water molecules?
Helps to pull water up through the microscopic vessels of plants
Which other substance do water molecules form hydrogen bonds? (adhesion)
Plant cell walls
What is the definition of specific heat of a substance?
The amount of heat that must be absorbed or lost for 1 gram of that substance to change its temperature by 1 degree Celsius.
Which property of water allows it to resist changes in temperature?
It’s high specific heat capacity
What is the specific heat capacity of water?
1 cal/g/Celcius
What is the definition of heat of vaporisation?
The quantity of heat a liquid must absorb for 1 gram of it to be converted to a gas
Which property of water contributes to its solvent abilities?
Its polarity - forms hydrogen bonds easily
What is the definition of a hydrophilic substance?
Has an affinity for water
What is the definition of a hydrophobic substance?
Does not have an affinity for water
How do acids increase the hydrogen ion concentration of a solution?
By releasing hydrogen ions
How do bases decrease the hydrogen ion concentration of a solution?
By accepting hydrogen ions or by releasing hydroxide ions
