The anode compartment contains [SO2-4] with a concentration of 1.30 m, this is in equilibrium with PbSO4 (s). The dissociation of PbSO4 is:
PbSO4 + H2O ---> Pb 2+ + SO4 2-
The Ksp of PbSO4:
Ksp = [Pb2+] [SO4-2]
B because A is for radios of course and C is thermal energy and D is radioactive
Distance!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Manganese dioxide is a catalyst.
Explanation:
The decomposition of hydrogen peroxide into water and oxygen is a slow reaction and MnO₂ is used as a catalyst to speed up the reaction.
The role of MnO₂ (catalyst):
- Chemical reactions occur faster in the presence of a catalyst because the catalyst provides an alternative reaction pathway with a lower activation energy than the non-catalyzed mechanism.
- In catalyzed mechanisms, the catalyst usually reacts to form a temporary intermediate, which then regenerates the original catalyst in a cyclic process.
- A substance which provides a mechanism with a higher activation energy does not decrease the rate because the reaction can still occur by the non-catalyzed route.
- The catalyst does not used up in the reaction.
So, the right choice is:
Manganese dioxide is a catalyst.