KMT & IMF's
According to the kinetic-molecular theory, particles of matter _______
are in constant motion
A solution that contains as much solute as can be dissolved is said to be
saturated
Which of the following is NOT evidence that a chemical reaction has occurred?
color change
solid formation
gas formation
emission of light
4. emission of light
An electron-pair acceptor is a
lewis acid
What type of reaction is the generic equation A + B → AB
synthesis
Which process can be explained by the kinetic-molecular theory?
a. Combustion
b. Oxidation
c. Condensation
d. Displacement reactions
condensation
Gases are most soluble in liquids at ______ temperature and ______ pressure
low; high
When the equation, ___N2 + ___H2 ___NH3 is balanced, the coefficient of hydrogen is
1
2
3
4
none of the above
3
The stronger the acid, __________
the weaker its conjugate base
What is the pH of a 1 x 10-3M KOH solution?
11
According to the kinetic-molecular theory, which substances are made of particles?
all matter is made up of particles
The defining expression for the molarity concentration unit is
moles of solute/liters of solution
What type of reaction is the generic equation AB → A + B
decomposition
A solution with a pH of 9.50 has a pOH of __________
4.50
What is the term for a digit in front of a chemical formula that helps to balance a chemical equation?
coefficient
According to the kinetic-molecular theory, particles of matter are in motion in which states of matter?
solids, liquids, and gases
A solution is made by dissolving 0.40 mole of NaCl in enough water to give a final volume of 250.0 mL. What is the molarity of the solution?
1.6 M
What are the coefficients for the following reaction when it is properly balanced? ___potassium iodide + ___lead (II) acetate ___lead (II) iodide +___potassium acetate
2;1;1;2
Ammonia (NH3) acts as a weak base in aqueous solution. What is the acid that reacts with this base when ammonia is dissolved in water?
water
define molality
moles of solute/kg of solvent
Particles within a solid
a. do not move.
b. vibrate about fixed positions.
c. move about freely.
d. exchange positions easily.
vibrate about fixed postions
Compared to pure water, a 1 M sugar-water solution will have ____ boiling point, _______ freezing point, and ______ vapor pressure
higher; lower; lower
Which of the following chemical reactions represents an acid-base reaction?
HBr + KOH → KBr + H2O
ZnCl2 + MgSO4 → ZnSO4 + MgCl2
H2SO4 + CaCl2 → CaSO4 + HCl
NH4OH + KCl → KOH + NH4Cl
1.
a large Ka would mean _________ and a small Ka would mean _______
a large amount of ionization occurred, more ions present in solution than initial acid; only a small amount of ionization occurred, most particles in solution are initial acid, not ions
types of matter that are considered chemically pure substances
elements & compounds