can some one please help me please fast fast

Chemistry
Tutor: None Selected Time limit: 1 Day

The Hg atom in HgCl2 

The Si atom in SiF4


Which of the following aqueous solutions can be safely stored in a copper container? 

 NiCl2
 NaBr
AgNO3
 HNO3
HBr

please ask for options under the chart

2Fe(s) + 8HCl(aq) _____> 2HFeCl4(aq) + 3H2(g) 

14HNO3(aq) + 3Cu2O(s)  ____________ 6Cu(NO3)2(aq) + 2NO(g) + 7H2O(l) 

May 14th, 2015

Hg = +2

Si = +4

NiCl2 (correct)

 NaBr (correct)
AgNO3 (notcorrect)
 HNO3(not correct)
HBr (correct)

May 14th, 2015


A.2H+ + 2e-  ___________________> H2
B.P4 +8OH-  ____________________> 4H2PO2- + 4e-
C.Fe +4Cl-  ____________________> FeCl4- + 3e-
D.HSO4- + 3H+ + 2e- ________________> H2SO3 + H2O
E.Cu2O +2H+ ____________>2Cu2+ +H2O + 2e-
F.NO3- + 4H+ + 3e-  __________________> NO + 2H2O
G.Fe __________________> Fe2+ + 2e-
H.P4 + 12H2O + 12e-  ____________> 4PH3 + 12OH-

May 14th, 2015

option A and B for first equation

option E and F for second equation

May 14th, 2015

but u have to have only one answers and u said 

option A and B for first equation

option E and F for second equation


May 14th, 2015

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


2Fe(s) + 8HCl(aq) _____> 2HFeCl4(aq) + 3H2(g) 

14HNO3(aq) + 3Cu2O(s)  ____________ 6Cu(NO3)2(aq) + 2NO(g) + 7H2O(l) 


the options are given to u

May 14th, 2015

you didn't tell me whether it's for oxidation or reduction...how would i know?

May 14th, 2015

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

May 14th, 2015

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