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Calculate the final molarity if 75.0 mL of a 5.0 M NaOH solution were diluted to a final volume of 650.0
mL. M1V1 = M2V2
0.58 M NaOH
Jared believes that equilibrium means the concentration of
reactants is equal to the concentration of products. Do you
agree or disagree? Explain your answer.
Disagree because concentrations do not have to be equal at equilibrium
Explain the difference between activation energy and activated complex?
Activation energy is the minimum amount of energy needed to react
Activated complex is the intermediate between reactants and products
Explain the following P.E. diagram using correctly the terms endothermic and exothermic processes and reactions.
Exothermic reaction
Endothermic process
Exothermic process
Which way would a system at equilibrium shift if products were
removed?Towards the right (products)
Joe believes that a reaction stops when it reaches equilibrium. Do you agree or disagree? Explain
your answer.Disagree because equilibrium is
mainly about forward and reverse rates canceling each other out
Which way would a system at equilibrium shift if heat were
added to an exothermic reaction?
Towards the left (reactants) because heat is like a product in exothermic
reactions (heat released)
Calculate the initial molarity of a Pb(NO3)2 solution if 40.0 mL were diluted to make 2.10 L of a 0.50 M
Pb(NO3)2 solution. M1V1 = M2V2
26 M Pb(NO3)2
Which is the more diluted solution? Explain.
Explain how using reactants with a smaller surface area would affect the reaction rate in terms of the
collision of particles.Smaller surface area would decrease
reaction rate because less particles are exposed for collisions to occur
Which part of the P.E. diagram represents change in enthalpy?
What is the molar mass of Li2S? Please include units.
45.95 g/mol Li2S
Calculate the volume of a 6.0 M KOH solution needed to make
850.0 mL of a 1.20 M solution?M1V1 = M2V2
170 mL of 6.0 M KOH
Which way would a system at equilibrium shift if products were
added?Towards the left (reactants)
Which is the more concentrated solution? Explain.
Which way would a system at equilibrium shift if reactants were
added?Towards the right (products)
How many grams of MgSO4 are required to prepare 350.0 mL of a
1.50 M solution?M = mol/L
63.2 g MgSO4
Explain how decreasing the concentration of reactants would
affect the reaction rate in terms of the collision of particles.
Decreasing concentration would decrease reaction rate because less
particles would be available to collide
What is the molar mass of KOH? Please include units.
56.11 g/mol KOH
Will this reaction be hot or cold to the touch? Explain.
Hot because energy from the reaction is released to your hand
Which is the solvent in this solution?
Which way would a system at equilibrium shift if heat were
removed from an endothermic reaction?
Towards the left (reactants) because heat is like a reactant in endothermic
reactions (heat absorbed)
Which way would a system at equilibrium shift if heat were
added to an endothermic reaction?
Towards the right (products) because heat acts like a reactant in
endothermic reactions (absorbed)
Calculate the final volume in milliliters of a NH4Cl solution if
125.0 mL of a 7.0 M solution were diluted to 0.15 M.
M1V1 = M2V2
5800 mL NH4Cl
Is the reaction endothermic or exothermic? Explain.
Exothermic because energy of products is less than energy of
reactants
What is the molar mass of HC2H3O2? Please include units.
60.06 g/mol HC2H3O2
Which way would a system at equilibrium shift if heat were removed from an exothermic
reaction?Towards the right (products) because heat is like a product in exothermic
reactions (heat released)
Which is the solute in this solution?
Which way would a system at equilibrium shift if reactants were
removed?Towards the left (reactants)
What is the molarity of a solution containing 28.0 g of magnesium
chloride in enough water to make 1.50 L of solution?
M = mol/L0.196 M MgCl2
Calculate the final molarity if 15.0 mL of a 3.0 M NaOH solution were diluted to a final volume of 450.0
mL. M1V1 = M2V2
0.10 M NaOH
Calculate the initial molarity of a Pb(NO3)2 solution if 200.0 mL were diluted to make 1.00 L of a 0.30 M
Pb(NO3)2 solution. M1V1 = M2V2
1.5 M Pb(NO3)2
What is the molar mass of sodium hydroxide? Please include units.
40.00 g/mol NaOH
Calculate the volume of a 2.0 M KOH solution needed to make
150.0 mL of a 0.50 M solution?M1V1 = M2V2
38 mL of 2.0 M KOH
How many grams of sodium chloride are required to prepare 150.0 mL of a 2.50 M solution?
M = mol/L21.9 g NaCl
What is the molar mass of HCl? Please include units.
36.46 g/mol HCl
Calculate the final volume in milliliters of a CaCl2 solution if 25.0
mL of a 6.0 M solution were diluted to 0.10 M.
M1V1 = M2V2
1500 mL CaCl2
What is the molar mass of C6H12O6? Please include units.
180.18 g/mol C6H12O6
Explain the difference between activation energy and activated complex?
Activation energy is the minimum amount of energy needed to react
Activated complex is the intermediate between reactants and products
Explain the following P.E. diagram using correctly the terms endothermic and exothermic processes and reactions.
Endothermic reaction
Endothermic process
Exothermic process
Which part of the P.E. diagram represents change in enthalpy?
Is the reaction endothermic or exothermic? Explain.
Endothermic because energy of products is greater than energy of
reactants
Will this reaction be hot or cold to the touch? Explain.
Cold because energy from your hand is absorbed in the reaction
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