WATER (H20) WORKSHEET (for quiz)
Because water molecules are polar, they tend to stick to other polar substances. This property is called _____________________. This is why water droplets stick to window
adhesion
what does electronegative mean?
atom attracts electrons
What happens when ionic compounds dissolve in water?
breaks into ions
_______________________ is the tendency of water molecules to stick together. This happens because the positive end of one water molecule attracts the _____________________ end of another
cohesion, negative
The ________________________ of ions in a water solution determines how much electric current the solution can conduct
concentration
Substances that can conduct an electric current when they are dissolved in water are called ________________________________.
electrolytes
Water's ____________________________ makes water more viscous than it would be if it were composed of nonpolar molecules
higher bonds
Only water that contains ____________________________ can conduct electricity
ions/electrolytes
super solvent
it can dissolve many other polar (charges) and ionic compounds
what is one thing that could happen if the internal temperature got too high
it damages your enzyme
Why can organisms survive when a lake freezes over?
it insulates the bottom
When water freezes, the molecules spread slightly apart. The ice floats because ice is ____________________ dense than water
less
surface tension
liquid to resist external force
Lead II Chloride is only slightly soluble in water, so the concentration of ions in the solution is ___________________
low
The orderly arrangement, or crystalline structure, of ice keeps the molecules from doing what?
packing together
The ___________________nature of water causes ice to float
polar
The negative end of water molecules is attracted to ___________________ ions and the positive end of water molecules is attracted to __________________ ions
positive, negative
The negative end of water molecules is attracted to the _________________ions while the positive end of water molecules is attracted to _____________________ ions
positive, negative
When sodium chloride (NaCl) dissolves in water, it breaks up into _____________ ions and ________________ ions
sodium, chlorine
Which is more viscous, water or syrup?
syrup
In what direction do lakes freeze?
top
The ____________________ sharing of electron causes a water molecule to be polar.
unequal
_____________________ is the resistance of a liquid to flow
viscosity
adhesion
water sticks to other things
cohesion
water sticks to water
Does the fact water is polar affect the way it acts in solutions, Yes or No? Explain.
yes, it allows it to dissolve substances that have charges
The higher the concentration of a ions in solution, the __________ current the solution can carry
more
Polar molecules are molecules with a slightly _____________ end and a slightly _____________________end
negative, positive
The oxygen end of a water molecule has a partial _________________charge while the hydrogen end has a partial ____________________ charge
negative, positive
What is the formula for water?
H2O
_____________________ is very soluble in water, so the concentration of ions in the solution is high
NaCl