Name: 
 

Online Study Guide - Chemistry I - Reactions


Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
If hydrochloric acid and potassium hydroxide react, what is the product of the net ionic equation for the reaction?
a.
hydrochloric acid
c.
potassium chloride
b.
hydrogen ions
d.
water
 

 2. 
H+(aq) + Br–(aq) + K+(aq) + OH2(aq) reactions_files/i0030000.jpg H2O(l) + Br–(aq) + K+(aq) is an example of what type of chemical equation?
a.
complete ionic
c.
precipitation
b.
net ionic
d.
spectator
 

 3. 
What type of reaction takes place when fluorine reacts with sodium bromide?
a.
Single-replacement
c.
Combination
b.
Double-replacement
d.
Decomposition
 

 4. 
What are the products of the double-replacement reaction between aqueous hydrogen bromide and aqueous sodium hydroxide?
a.
Sodium oxybromide and water
c.
Sodium hydro bromide and hydroxyl ions
b.
Sodium hydride, bromine, and water
d.
Water and sodium bromide
 

 5. 
Which of the following is a balanced chemical equation?
a.
AgNO3 + NaCl ® 4AgCl + 2NaNO3
b.
2AgNO3 + 2NaCl ® 3AgCl + 2NaNO3
c.
AgNO3 + NaCl ® AgCl + NaNO3
d.
AgNO3 + 2NaCl ® AgCl + 3NaNO3
 

 6. 
Which of the following could represent a decomposition reaction?
a.
compound = element + element
b.
compound + compound = compound + compound
c.
element + compound = element + compound
d.
element + element = compound
 

 7. 
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactants?
a.
There is no relationship.
b.
The mass of the products is greater.
c.
The mass of the reactants is greater.
d.
The masses are equal.
 

 8. 
What is an insoluble compound that forms during a chemical reaction?
a.
aqueous
c.
inhibitor
b.
catalyst
d.
precipitate
 

 9. 
A chemical reaction in which two or more substances combine to form another substance is called a ____.
a.
synthesis reaction
c.
product
b.
decomposition reaction
d.
reactant
 

 10. 
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?
a.
0
c.
2
b.
1
d.
4
 

 11. 
What type of reaction is shown in the following chemical equation: 2H2O ® 2H2 + O2?
a.
decomposition
c.
single–displacement
b.
double–displacement
d.
synthesis
 

 12. 
The formula for the products between sodium hydroxide and sulfuric acid are ___.
a.
NaSO4 + H2O
c.
NaS2 + H2O
b.
Na2SO4 + H2O
d.
NaH + SOH
 

 13. 
Given the following combustion reaction of a hydrocarbon, balance the equation and determine the coefficient of H2O.
                              C4H6  +  O2  ®  CO2 +  H2O
a.
3
c.
2
b.
6
d.
11
 

 14. 
In the equation 2Fe + 3F2 ® 2FeF3, what is iron?
a.
product
c.
acid
b.
reactant
d.
base
 

 15. 
Mole ratios for a reaction are obtained from what?
a.
Avogadro’s number
c.
subscripts
b.
balanced chemical equation
d.
charges
 

 16. 
What is the coefficient that belongs in front of carbon dioxide in the equation?
____C3H8 + ___O2 ® ____CO2 + ___H2O
a.
3
c.
4
b.
6
d.
5
 

 17. 

       The following reaction is an example of which type of reaction?
      AgNO3(aq)  +    NaCl (aq) ®     AgCl(s)  +  NaNO3(aq)
a.
synthesis
c.
single replacement
b.
decomposition
d.
double replacement
 

 18. 
What are the coefficients to correctly balance the formula equation
               Pb(NO3)2 (aq) + KI (aq)  ®  PbI2 (s)  +  KNO3(aq)
a.
1 2 1 2
c.
1 4 1 4
b.
2 1 2 1
d.
4 1 4 1
 

 19. 
What is the balanced equation when aluminum reacts with copper(II)sulfate?
a.
Al + CuSO4 ® Cu + AlSO4
c.
4Al + 3Cu2(SO4)2 ® 6Cu + 2Al2(SO4)3
b.
2Al + 3CuSO4 ® 3Cu + Al2(SO4)3
d.
2Al + Cu2(SO4)2 ® 2Cu + 2AlSO4
 

 20. 
How do you know when a chemical equation is balanced?.
a.
the number of atoms on the left equals the number of atoms on the right
c.
the product has less grams
b.
the total number of moles of reactants equals the total number of moles of product
d.
the product has more grms
 

 21. 
Write the reaction for the combustion of C4H6, balance the equation, and determine the coefficient of H2O.
a.
3
c.
2
b.
6
d.
11
 

 22. 
The spectator ions in the reaction between aqueous perchloric acid and aqueous barium hydroxide are ____________.
a.
OH- and ClO4-
c.
H+ and OH-
b.
H+, OH-, ClO4-, and Ba2+
d.
ClO4- and Ba2+
 

 23. 
Consider the following reaction:
Al(NO3)3 + Na2S ® Al2S3 + NaNO3
a.
2,3,1,6
c.
1,1,1,1
b.
2,1,3,2
d.
4,6,3,2
 

 24. 
What is the coefficient of Al when the following equation is balanced?
Al + H2O ® Al(OH)3 + H2
a.
1
c.
3
b.
2
d.
4
 

 25. 
What is the coefficient of H2S when the following equation is balanced?
                  FeCl3 + H2S ® Fe2S3 + HCl
a.
1
c.
3
b.
2
d.
4
 

 26. 
What is the coefficient of FeCl3 when the following equation is balanced?
             FeCl3 + Na2CO3 ® Fe2(CO3)3 + NaCl
a.
1
c.
3
b.
2
d.
4
 

Matching
 
 
Match the terms below with their correct definitions.
a.
aqueous solution
j.
precipitate
b.
chemical equation
k.
product
c.
chemical reaction
l.
reactant
d.
coefficient
m.
single-replacement reaction
e.
combustion reaction
n.
spectator ion
f.
complete ionic equation
o.
synthesis reaction
g.
decomposition reaction
p.
solute
h.
double-replacement reaction
q.
solvent
i.
net ionic equation
 

 27. 
A reaction in which a compound breaks down into two or more elements or new compounds
 

 28. 
A number written in front of a chemical formula
 

 29. 
A solid produced during a chemical reaction in a solution
 

 30. 
A solution in which the solvent is water
 

 31. 
A statement that uses chemical formulas to show the identities and relative amounts of the substances involved in a chemical reaction
 

 32. 
An equation that shows all of the particles in solution as they actually exist
 

 33. 
An equation that includes only the particles that participate in the reaction
 

 34. 
An ion that is present but does not participate in a reaction
 

 35. 
A reaction in which oxygen combines with a substance and releases heat and light energy
 

 36. 
A reaction in which the atoms of one element replace the atoms of another element in a compound
 

 37. 
A reaction involving the exchange of positive ions between two compounds dissolved in water
 

 38. 
The process by which the atoms of one or more substances are rearranged to form different substances
 

 39. 
A starting substance in a chemical reaction
 

 40. 
A substance formed during a chemical reaction
 

 41. 
A reaction in which two or more substances react to produce a single product
 
 
Assume that Q, T, X, and Z are symbols for elements. Match each equation with the reaction type it represents
a.
decomposition
c.
single-replacement
b.
double-replacement
d.
synthesis
 

 42. 
Q + XZ reactions_files/i0460000.jpg X + QZ
 

 43. 
Q + Z reactions_files/i0470000.jpg QZ
 

 44. 
QT reactions_files/i0480000.jpg Q + T
 

 45. 
QT + XZ reactions_files/i0490000.jpg QZ + XT
 
 
a.
precipitate
d.
coefficient
b.
product
e.
spectator ion
c.
reactant
 

 46. 
A number written in front of a chemical reaction
 

 47. 
A solid produced during a chamical reaction
 

 48. 
An ion that is present, but does not participate in the reaction
 

 49. 
A substance formed during a chemical reaction
 

 50. 
A starting substance in a chemical reaction
 



 
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