You need to login first

Login information

Haven't yet registered?

×

Categories

Homework Help Boards (University / College Level)

Biology-Related

Science-Related

Others

Laboratory Help


Non-Homework Help Boards

Notes

Guidance

Discussion

×
* * * *
Skip91
2642
top posters

Support Us

If you found our community helpful, your small donation will help us reach more students around the globe. You may also like us on Facebook or follow us on Twitter.
Pages: 1     Go Down
  New Topic  |  more  
SakurasFlowers
wrote...
4 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 4194 times
  • 2 Replies
wrote...
*
*
Posts: 988
Credits: 3383
Rep:  +92 
     
4 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 Right Arrow +9,....add 10 (OH-)'s to the right side & you will have 1- Right 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:

you can get answers or check answers to balanced redox reactions by going to this site!
wrote...
*
Posts: 14512
Credits: 928
Rep:  +1234  -5 
     
4 years ago
Mg (s) + VO43- (aq) Right Arrow Mg2+ (aq) + V2+ (aq) (Base)
Mg Right Arrow Mg2+ + 2 e-                 x3
3 e- + 8 H+ + VO43- Right Arrow V2+ + 4 H2O              x2
3Mg Right Arrow 3Mg2+ + 6 e-
6 e- + 16 H+ + 2 VO43- Right Arrow 2 V2+ + 8 H2O
3Mg + 16 H+ + 2 VO43- Right Arrow 3Mg2+ + 2 V2+ + 8 H2O + 16 OH-          on both sides

3Mg + 8 H2O + 2 VO43- Right Arrow 3Mg2+ + 2 V2+ + 16 OH
Donate to keep this website running
✓ Like us on Facebook
✓ Follow us on Twitter
Pages: 1     Go Up New Topic more
Related Topics
Note: This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.

Ask a Question

ask
Click to ask a question. 645 Students and 62 members are standing by to answer all your science and biology homework problems, free. So far today, 473 guests have joined.
Related Images
Views
860
Rating

Views
1679
Rating

Views
32
Rating