× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
SakurasFlowers SakurasFlowers
wrote...
13 years ago
How to write net ionic equations for basic and acidic solutions?
Write a balanced net ionic equation for the following reaction in basic solution:

1 ) Zn(s) + NO3- (aq) -> NH3(aq) + Zn(OH)4^(2-)

Write a balanced net ionic equation for the following reaction in acidic solution:

2 ) Mg(s) + VO4^(3-)(aq) -> Mg^(2+)(aq) + V^(2+)

3 ) PbO2(s) + CI-(aq) -> PbCI2(s) + O2(g)
Read 8191 times
2 Replies

Related Topics

Replies
wrote...
Donated
Valued Member
13 years ago
Zn ------> Zn+2 & 2 electrons lost

(NO3)- & 8 electrons taken ------> (NH4)+
(N+5 in nitrate goes to N-3 in ammonium)

four times the Zn reaction to balance the electrons taken & lost:
4Zn ------> 4Zn+2 & 8 e-
(NO3)- & 8 e- ------> (NH4)+

combine the two 1/2 reactions:
4 Zn & (NO3)-1 ---> 4 Zn+2 & (NH4)+1

we need to balance the charges on both sides: -1 Rightwards Arrow +9,....add 10 (OH-)'s to the right side & you will have 1- Rightwards Arrow -1 :
4 Zn & (NO3)-1 ---> 4 Zn+2 & (NH4)+1 & 10 OH-

balance the H's using neutral water:
4 Zn & (NO3)-1 & 7 H2O ---> 4 Zn+2 & (NH4)+1 & 10 OH-

Also, here is a set-by-set way of doing them: http://tiny.cc/i0i6c

you can get answers or check answers to balanced redox reactions by going to this site!
http://www.gregthatcher.org//Chemistry/BalanceChemicalEquations.aspx?StartsWith=O
wrote...
Educator
13 years ago
Mg (s) + VO43- (aq) Rightwards Arrow Mg2+ (aq) + V2+ (aq) (Base)
Mg Rightwards Arrow Mg2+ + 2 e-                 x3
3 e- + 8 H+ + VO43- Rightwards Arrow V2+ + 4 H2O              x2
3Mg Rightwards Arrow 3Mg2+ + 6 e-
6 e- + 16 H+ + 2 VO43- Rightwards Arrow 2 V2+ + 8 H2O
3Mg + 16 H+ + 2 VO43- Rightwards Arrow 3Mg2+ + 2 V2+ + 8 H2O + 16 OH-          on both sides

3Mg + 8 H2O + 2 VO43- Rightwards Arrow 3Mg2+ + 2 V2+ + 16 OH
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  896 People Browsing
 113 Signed Up Today
Related Images
  
 1168
  
 764
  
 213
Your Opinion
How often do you eat-out per week?
Votes: 79

Previous poll results: What's your favorite math subject?