Balancing redox equations (1 Viewer)

[kooltrainer]

1) Write a balanced half equation for the reduction of the dichromate (Cr2O7-2) ion in an acidic solution . It is reduced to the Cr3+ ion.
3)Write balanced half equations for the reduction of MnO2. It is reduced to Mn(OH)3
and another physics question if u do physics
2) Outline the effect of the michelson-morley experiment on scientists ideas about the aether at the time (3 marks)

 

[undalay]

1) Write a balanced half equation for the reduction of the dichromate (Cr2O7-2) ion in an acidic solution . It is reduced to the Cr3+ ion.

and another physics question if u do physics
2) Outline the effect of the michelson-morley experiment on scientists ideas about the aether at the time (3 marks)

1) Cr₂O7^2- + 14H⁺ +6e^- --> 2Cr³⁺ + 7H₂O

2) Michelson-morleys equipment was very precise at the time, scientists believed that if the sensitivity of michelson-morley's equipment could not detect the aether wind, then it did not exit.

Scientists began to doubt the aether when the null result came out, and began formulating new ideas and theories.

Einstein proposed his theory of relativity, and people moved away from the aether which could not be detected.

 

[kooltrainer]

why is it 6e-??

 

[namburger]

To balance the charges

-2 + 14 + -6 = 6