1.7 Water Flashcards
What is a anion
a negative ion formed when an atom gains elctrons
What is a cation
a postive ion formed when atom looses electrons
What are ionic bonds
Are attractive forces between oppsitlety charged ions
What are covalent bonds
Are formed when atoms share electrons
What is a dipole
the electrons in covalent bonds are not evenly shared
What is a polar molecule
Is a molecule contaninig a dipole
What are hydrogen bonds
Are weak electrostatic intermolecular bonds formed between polar molecules contatning at least one hydrogen atom
What happens when ionic substances are dissolved in water
The ions separate
What does it mean by water being polar solvent
that most ionic substaacnes will dissolve in it
Why is water a excellent transport medium
because so many different substances will dissolve in it
What deggress does water reach its maxium denisty
4 oC
Why is ice less dense than water
As water cools the molecules become more widley spread
Why does water have a hugh specific heat capacity
The hydrogen bonds between the molecules mean it takes a lot of energy to sepreate them
Can water be compressed
NO
How are water molcules cohesive
The forces between the molecules meant they stick together
