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junior college 2 | H2 Maths
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Can someone help me with balancing these 2 redox equations? And could u include detailed working/explanation because my answer is wrong but i don’t know where i gone wrong .. Thaks so much:)
Date Posted: 4 years ago
Views: 324
https://www.chemguide.co.uk/inorganic/redox/equations2.html
NO3- + Al → NH3 + Al(OH)4-
N and Al are already balanced.
So balance O first using H2O.
① NO3- + Al + H2O → NH3 + Al(OH)4-
Notice that the left hand side has 5 less H than the right hand side.
If you add H2O to left side and OH- to right side, you're adding one more H+ overall on the left as compared to the right.
This helps to lower the difference in H on both sides.
To reduce the difference from 5 to 0, add 5 more H2O to the left and 5 more OH- to the right
② NO3- + Al + 6H2O→ NH3 + Al(OH)4- + 5OH-
Now balance the electron count.
③ NO3- + Al + 6H2O + 5e→ NH3 + Al(OH)4- + 5OH-
N and Al are already balanced.
So balance O first using H2O.
① NO3- + Al + H2O → NH3 + Al(OH)4-
Notice that the left hand side has 5 less H than the right hand side.
If you add H2O to left side and OH- to right side, you're adding one more H+ overall on the left as compared to the right.
This helps to lower the difference in H on both sides.
To reduce the difference from 5 to 0, add 5 more H2O to the left and 5 more OH- to the right
② NO3- + Al + 6H2O→ NH3 + Al(OH)4- + 5OH-
Now balance the electron count.
③ NO3- + Al + 6H2O + 5e→ NH3 + Al(OH)4- + 5OH-
See 1 Answer
done
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Not 100% sure if this is correct but i used the same steps for both chem equations by
1) balancing O with H2O
2) balancing H with H+
3) balancing charges with electrons
4) removing H+ with OH-
1) balancing O with H2O
2) balancing H with H+
3) balancing charges with electrons
4) removing H+ with OH-
Date Posted:
4 years ago
Yup, , looks correct to me
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