unti 1 - 🧪THE CHEMISTRY OF LIFE

water is said to be POLAR because…

it’s atoms have an uneven sharing of electrons

hydrogen bonds between one water molecule and another cause:

COHESION

cohesion leads to…

HIGH SURFACE TENSION

water attaching to the inside of a stem demonstrates…

ADHESION

when water freezes, the ice is ____ dense than liquid water

LESS

bonds between the H and O atoms in water are:

COVALENT

what makes water POLAR?

uneven sharing of electrons

bond that forms between oxygen of one water molecule and the hydrogen of another water molecule

HYDROGEN BOND

water is known to be resistant to changes in its temperature. this property is called a high __

SPECIFIC HEAT

when water molecules are able to “stick” to a glass or mirror this is called

ADHESION

why does the pepper spread out after soap is added?

the soap DECREASES the surface tension

how does water behave when FROZEN?

less dense than liquid water

water is used in blood and in the kidneys as a:

SOLVENT

why does ice float in liquid water?

lattice structure makes it LESS dense

PROPERTY OF WATER (2 positive charge H and one negative charge O molecule )

POLAR

end of water molecule is…and the other end is… THIS IS CALLED

POSITIVELY CHARGED. NEGATIVELY CHARGED. POLAR

when u put ice in water, it

FLOATS

why is water the universal solvent??

• can dissolve all substances

• bc water is a POLAR molecule

surface tension is caused by……

the attraction of water molecules to water molecules

high specific heat

ex. it takes a large amount of energy to increase the temperature of 1kg of water by 1o C