please can u help me out

May 13th, 2015
Price: $10 USD

Question description

Match the appropriate oxidation number to the element in red: 

SO42-                                              The P atom in PF5                                The Mg atom in MgF2

HSO3-                                             The Fe atom in FeO 

NH4+                                             The Cu atom in CuSO4
Na2S                                 The Mn atom in KMnO4
P4                                                  The Hg atom in HgCl2 

The Mn atom in KMnO4                                          

Calculate the standard cell potential for

Ags | Ag+aq || Fe2+aq | Fes

if the standard electrode reduction potentials are

Ag+aq | Ags = 0.799 V Fe2+aq | Fes = -0.409 V

The C atom in CCl4
 The Li atom in Li3
The Cr atom in CrCl3

The Cl atom in NaCl 
The C atom in CO2
The N atom in N2
The P atom in PF5

for  each of the following four reactions, select from the list (A - H) the half-reaction which shows the reduction of the oxidizing agent

3H2O(l) + P4(s) + 3KOH(aq) -->  3KH2PO2(aq) + PH3(g)
C2H4O(aq) + 2KOH(aq) + 2Ag(NH3)2NO3(aq) -->  HC2H3O2(aq) + 2Ag(s) + 2KNO3(aq) + 2NH3(aq) + H2O(l)
4Au(s) + 16KCN(aq) + 3O2(g) + 6H2O(l) -->  4KAu(CN)4(aq) + 12KOH(aq)
2H2SO4(s) + Fe(s) -->  H2SO3(aq) + FeSO4(aq) + H2O(l)

Calculate the standard cell potential for

Fes | Fe2+aq || Ni2+aq | Nis

if the standard electrode reduction potentials are

Fe2+aq | Fes = -0.409 V Ni2+aq | Nis = -0.236 V

Match the appropriate oxidation number to the element in red: 
the P in          PO43-
the s in            K2SO3
the o in        Al2O3
the s    in         S8

the s in             SO2Cl2

 The Si atom in SiF4
 The Al atom in AlF3

The S atom in Na2SO4

Tutor Answer

(Top Tutor) Daniel C.
School: University of Maryland

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