Question : 81.              Consider the half-reaction NH4+(aq) ? NO3?(aq).  When the equation : 1335552

 

 

81.              Consider the half-reaction NH4+(aq) ? NO3?(aq).  When the equation is balanced in acid solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 6    C)  7, 6    D)  4, 4    E)  3, 8

 

82.              Consider the half-reaction NO3?(aq) ? NO(aq).  When the equation is balanced in acid solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  2, 3    B)  2, 6    C)  3, 6    D)  4, 4    E)  3, 2

 

83.              Consider the half-reaction ClO? (aq) ? Cl?(aq).  When the equation is balanced in basic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 1    C)  3, 4    D)  1, 2    E)  2, 3

 

84.              Consider the half-reaction O2(aq) ? OH?(aq).  When the equation is balanced in basic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 1    C)  2, 4    D)  1, 2    E)  2, 3

 

85.              Consider the reaction:

H3AsO3(aq) + BiO3?(aq) ? H3AsO4(aq) + Bi(s)

When this equation is balanced in acidic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  2, 6    B)  2, 1    C)  1, 10    D)  1, 2    E)  2, 3

 

86.              Consider the reaction:

CrO42?(aq) + HSO3?(aq) ? Cr3+(aq) + SO42?(aq)

When this equation is balanced in acidic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 1    C)  2, 4    D)  5, 6    E)  2, 3

 

87.              Consider the reaction:

Zn(s) + NO3?(aq) ? NH3(aq) + Zn(OH)42?(aq)

When this equation is balanced in basic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 1    C)  6, 8    D)  5, 6    E)  2, 3

 

88.              Consider the reaction:

Al(s) + H2O(l) ? Al(OH)4?(aq) + H2(g)

When this equation is balanced in basic solution, the coefficient for water will be__________, and the number of electrons transferred will be __________.

A)  3, 3    B)  2, 1    C)  6, 8    D)  6, 6    E)  2, 3

 

89.              Given the following information about the activity series, predict whether the given reaction will occur or not.  If it does occur, write a balanced equation.

Cu < H2 < Sn < Fe < Zn < Mg Mg(s) + HCl(aq) ? A)No reaction will occur. B)Mg(s) + HCl(aq) ? MgH(aq) + Cl(aq) C)Mg(s) + HCl(aq) ? MgCl(aq)  + H(aq) D)Mg(s) + 2HCl(aq) ? MgCl2(aq)  + H2(g) E)Mg(s) + 2HCl(aq) ? MgH2(aq)  + Cl2(g)   90.              Given the following information about the activity series, predict whether the given reaction will occur or not.  If it does occur, write a balanced equation. Cu < H2 < Sn < Fe < Zn < Mg Mg(s) + ZnCl2(aq) ? A)No reaction will occur. B)Mg(s) + ZnCl2(aq) ? MgCl(aq) + ZnCl(aq) C)Mg(s) + ZnCl2(aq) ? MgCl2(aq) + Zn(s) D)Mg(s) + ZnCl2(aq) ? MgZn(s) + Cl2(g) E)Mg(s) + ZnCl2(aq) ? MgCl2(aq) + Zn(aq)    

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