CHEMISTRY FINAL EXAM REVIEW
QUESTIONS WITH COMPLETE VERIFIED
ACCURATE ANSWERS
7 - answer ✔✔-How many valence electrons are in an atom of chlorine?
3 - answer ✔✔-How many valence electrons does aluminum have?
The decrease in concentration of reactants or the increase in concentration of products with time. -
answer ✔✔-Define Reaction Rate
Increasing temperature causes the kinetic energy to increase. Thus, molecules are moving faster and
colliding more frequently. This causes the rate of reaction to incrase. - answer ✔✔-How does increasing
temperature affect the rate of reaction?
Decreasing concentration leads to less reactants available for collision. Therefore, reaction rate
decreases. - answer ✔✔-If I decrease the concentration of reactant, what happens to the rate of
reaction?
By increasing the surface area of reactant molecules, we are increasing the space or point of contact
that these molecules have available to interact. This causes an increase in the rate of reaction. - answer
✔✔-How does surface area influence reaction rate?
A catalyst speeds up a chemical reaction by finding an alternate pathway with a lower activation energy.
- answer ✔✔-How does a catalyst speed up a chemical reaction?
The energy required to start a chemical reaction. - answer ✔✔-Define activation energy.
Equilibrium is established when the rate of the forward reaction is equal to the rate of the reverse
reaction. - answer ✔✔-Define equilibrium.
, Absorbed. - answer ✔✔-Is energy absorbed or released in an endothermic reaction?
Exothermic reactions release energy. The sign of delta H is negative. - answer ✔✔-What is the sign of
delta H for an exothermic reaction?
Exothermic; heat is being given off. - answer ✔✔-When you touch a flask and it feels hot, is this an
endothermic or exothermic process?
The amount of heat required to raise 1g of a substance to 1 degrees Celsius. - answer ✔✔-Define
specific heat capacity.
Heat (kJ) - answer ✔✔-q=mc(delta)T ; What does "q" stand for?
Specific heat capacity (J / g degrees C) - answer ✔✔-q=mc(delta)T ; What does "c" stand for?
An acid. - answer ✔✔-What is a hydrogen ion donor called?
A base. - answer ✔✔-What is a hydrogen ion acceptor called?
Base. - answer ✔✔-Feels slippery; acid or base?
Acid. - answer ✔✔-Tastes sour; acid or base?
Base. - answer ✔✔-Tastes bitter; acid or base?
Acid - answer ✔✔-pH < 7 ; acid, base, or neutral?
Base - answer ✔✔-pH > 7 ; acid, base, or neutral?
QUESTIONS WITH COMPLETE VERIFIED
ACCURATE ANSWERS
7 - answer ✔✔-How many valence electrons are in an atom of chlorine?
3 - answer ✔✔-How many valence electrons does aluminum have?
The decrease in concentration of reactants or the increase in concentration of products with time. -
answer ✔✔-Define Reaction Rate
Increasing temperature causes the kinetic energy to increase. Thus, molecules are moving faster and
colliding more frequently. This causes the rate of reaction to incrase. - answer ✔✔-How does increasing
temperature affect the rate of reaction?
Decreasing concentration leads to less reactants available for collision. Therefore, reaction rate
decreases. - answer ✔✔-If I decrease the concentration of reactant, what happens to the rate of
reaction?
By increasing the surface area of reactant molecules, we are increasing the space or point of contact
that these molecules have available to interact. This causes an increase in the rate of reaction. - answer
✔✔-How does surface area influence reaction rate?
A catalyst speeds up a chemical reaction by finding an alternate pathway with a lower activation energy.
- answer ✔✔-How does a catalyst speed up a chemical reaction?
The energy required to start a chemical reaction. - answer ✔✔-Define activation energy.
Equilibrium is established when the rate of the forward reaction is equal to the rate of the reverse
reaction. - answer ✔✔-Define equilibrium.
, Absorbed. - answer ✔✔-Is energy absorbed or released in an endothermic reaction?
Exothermic reactions release energy. The sign of delta H is negative. - answer ✔✔-What is the sign of
delta H for an exothermic reaction?
Exothermic; heat is being given off. - answer ✔✔-When you touch a flask and it feels hot, is this an
endothermic or exothermic process?
The amount of heat required to raise 1g of a substance to 1 degrees Celsius. - answer ✔✔-Define
specific heat capacity.
Heat (kJ) - answer ✔✔-q=mc(delta)T ; What does "q" stand for?
Specific heat capacity (J / g degrees C) - answer ✔✔-q=mc(delta)T ; What does "c" stand for?
An acid. - answer ✔✔-What is a hydrogen ion donor called?
A base. - answer ✔✔-What is a hydrogen ion acceptor called?
Base. - answer ✔✔-Feels slippery; acid or base?
Acid. - answer ✔✔-Tastes sour; acid or base?
Base. - answer ✔✔-Tastes bitter; acid or base?
Acid - answer ✔✔-pH < 7 ; acid, base, or neutral?
Base - answer ✔✔-pH > 7 ; acid, base, or neutral?
