States of Matter
What are the three common states of matter?
Solid, Liquid, Gas
What kind of mixture looks the same all the way through?
Homogenous mixture
What law states that energy cannot be created or destroyed
The law of conservation of energy
What is chemical equilibrium?
A state where forward and reverse reactions occur at the same time.
What ions do acids produce in water?
Hydrogen ions (H+)
What is the process called when a liquid changes into a gas?
Vaporization
What does soluble mean?
Able to dissolve in a solvent
In an exothermic reaction, is heat released or absorbed?
Heat is released
What does the equilibrium constant tell us about a reaction?
It shows whether products or reactants are favored in equilibrium.
What's the pH of a natural solution?
7
According to the kinetic molecular theory, what happens to particle motion as temperature increases?
The particles move faster
What is the formula for molarity?
M=Moles divided by V
What does specific heat measure
The amount of heat needed to raise 1 gram of a substance by 1 degree Celsius.
In the equilibrium expression, are solids and liquids included?
No.
What is formed when an acid reacts with a base?
Salt and water
Which intermolecular force is strongest? Dispersion forces or dipole-dipole or hydrogen bonding?
Hydrogen bonding
What happens to the concentration of a solution when more solvent is added?
The concentration decreases
During melting, a substance absorbs or releases energy
It absorbs energy
According to Le Chatelier's principle, what happens if more reactant is added to a system at equilibrium?
The equilibrium shifts to the right, producing more products.
According to the Bronsted-Lowry definition, what does an acid do?
Donates a proton (H+)
Why does water have a high surface tension?
Water molecules form strong hydrogen bonds with each other creating strong cohesion at the surface.
What is the percent by mass of a solution made with 15 g of salt dissolved in 85 g of water?
15%
Why does temperature stay constant during a phase change, like boiling?
The added energy is used to break intermolecular forces instead of increasing the temperature.
Which will the equilibrium shift if more H2 is added
N2+3H2-2NH3
It will shift to the right to make more NH3
If the hydrogen ion concentration is 1 x 10^-3 M, what's the pH?
3