CBSE Class 11-science Answered
For the reaction, MnO4?+ C2O42? ? MnO2+ CO2 ; The simplest mole ratio of MnO4? and C2O42? in which they react is
Asked by debjit_dm | 04 May, 2020, 15:08: PM
![MnO subscript 4 superscript minus space space plus space straight C subscript 2 straight O subscript 4 superscript negative 2 end superscript space plus space straight H to the power of plus space rightwards arrow Mn to the power of plus 2 end exponent space plus space CO subscript 2 space plus space straight H subscript 2 straight O](https://images.topperlearning.com/topper/tinymce/cache/598bfad819fd549a8f2a34ced51508ba.png)
Oxidation number of Mn in ![M n O subscript 4 superscript negative 2 end superscript](https://images.topperlearning.com/topper/tinymce/cache/7e9b8d44de7ede1d3e6c888f2eec97a2.png)
![M n O subscript 4 superscript negative 2 end superscript](https://images.topperlearning.com/topper/tinymce/cache/7e9b8d44de7ede1d3e6c888f2eec97a2.png)
x-8=-1
x=+7
Change of oxidation number of Mn is from +7 to +2
The decrease in oxidation number is=7-2=5
Oxidation number of C increases from +3 to +4.
The change in oxidation number for 1 C atom=4-3=1
The increase in oxidation number for 2 C atom=2
1) To balance the oxidation number-
![2 M n O subscript 4 superscript minus space plus space 5 C subscript 2 O subscript 4 superscript negative 2 end superscript space rightwards arrow 2 M n to the power of plus 2 end exponent space plus space 10 C O subscript 2](https://images.topperlearning.com/topper/tinymce/cache/b0db04cb110fcde2697e42c2a61ea786.png)
2) Balance the O atoms by adding 8 water molecules on product side-
![2 MnO subscript 4 superscript minus space plus space 5 straight C subscript 2 straight O subscript 4 superscript negative 2 end superscript space rightwards arrow 2 Mn to the power of plus 2 end exponent plus 10 CO subscript 2 space plus space 8 straight H subscript 2 straight O](https://images.topperlearning.com/topper/tinymce/cache/b4bef569ccf3a7e60d7859eb1f9cbf82.png)
3) Balance the H atoms by adding 16 H+ ions to reactant side-
![2 M n O subscript 4 superscript negative 2 end superscript space plus space 5 C subscript 2 O subscript 4 superscript negative 2 end superscript space plus space 16 H to the power of plus rightwards arrow 2 M n to the power of plus 2 end exponent space plus space 10 C O subscript 2 space plus space 8 H subscript 2 O](https://images.topperlearning.com/topper/tinymce/cache/be15b2ef40955abb744ed7730915bc17.png)
This is the balanced equation.
The simples molar ratio of these reactants is 2:5.
Answered by Ravi | 04 May, 2020, 19:00: PM
Concept Videos
CBSE 11-science - Chemistry
Asked by patrasudipkumar191 | 05 Jul, 2024, 09:36: AM
CBSE 11-science - Chemistry
Asked by jaip83491 | 24 Jan, 2021, 10:43: AM
CBSE 11-science - Chemistry
Asked by sulaikhasulu393 | 07 Jun, 2020, 22:51: PM
CBSE 11-science - Chemistry
Asked by debjit_dm | 04 May, 2020, 15:08: PM
CBSE 11-science - Chemistry
Asked by Balbir | 30 Jun, 2019, 15:45: PM
CBSE 11-science - Chemistry
Asked by govtsecschoolnayaganv051 | 05 Sep, 2018, 13:32: PM
CBSE 11-science - Chemistry
Asked by govtsecschoolnayaganv051 | 09 Aug, 2018, 16:52: PM
CBSE 11-science - Chemistry
Asked by dineshchem108 | 17 Jul, 2018, 18:02: PM
CBSE 11-science - Chemistry
Asked by vaagai2353 | 29 Jun, 2018, 21:55: PM