Water Properties
Does water expand or shrink when it freezes?
Expands
Towards
If you add a solute to a solution, what will happen to the concentration?
What ion makes something acidic?
H+
Is this balanced or unbalanced?
1 H2O -> 2 H2 + 1 O2
Unbalanced
What is it called when water travels against gravity up a small tube?
Capillary Action
If Substance A has an electronegativity of 3.1 and Substance B has an electronegativity of 0.6, is it polar covalent, nonpolar covalent, or ionic?
Ionic
If you add water to a solution, what will happen to the concentration?
It will decrease
Do weak acids dissociate a lot or a little?
A Little
What is the coefficient in 5H2?
5
What type of "bond" is responsible for water's properties?
Hydrogen Bonds
What causes partial charges in a polar covalent bond?
Shifting / unequal electrons
What 2 units make up molarity (M)?
moles / liters
Would this have a strong or weak pH? Is it acidic or basic?
OH- = 6.4 x 1012 H+ = 1.2 x 101
Strong Base
If you react 6 H2 , how many O2 molecules will you use?
2H2 + O2 -> 2 H2O
3
What property of water allows it to dissolve substances?
Polarity
Which container (A or B) has a higher concentration?
A) 4 moles / 1 L B) 6 moles / 2 L
A
What happens when you add an acid to a base?
Neutralization
If you add Ca ions to a container with CaCl2, Ca, and Cl, what would happen?
CaCl2 <--> Ca + Cl2
It will shift to the left (more CaCl2 will be made)
Water has a high ______________, which means that it takes a lot of energy to break the hydrogen bonds.
Specific Heat Capacity
If an atom has a large atomic radius, is electronegativity higher or lower?
Lower
If you have 500mL of a 1.O M solution, and you add in 500mL of water, what is the new concentration?
If a base dissociates a lot when added to water, is the pH close to 0, 7, or 14?
14
If you add H2O molecules to a container with H2O, H2 and O2, what would happen?
H2 + O2 --> H2O
Nothing (not reversible)