Large crystal of potassium manganate placed at bottom of beaker with Coldwater
and left for several hours?
If potassium manganate is dissolved in water then name two processes that take place during experiment?
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Nov 11, 2023
When a large crystal of potassium manganate (KMnO4) is placed at the bottom of a beaker with cold water and left for several hours, several things may happen:
1. Dissolution: The crystal of potassium manganate will start to dissolve in the water. KMnO4 is highly soluble in water, so it will readily dissociate into its constituent ions: K+ and MnO4-.
2. Color change: As the potassium manganate dissolves, the water will turn purple or pink. This is because the MnO4- ion is intensely colored.
3. Equilibrium: Over time, the dissolution process will reach equilibrium, where the rate of dissolution equals the rate of precipitation. At this point, the concentration of KMnO4 in the water will remain constant.
4. Formation of hydrated ions: The K+ and MnO4- ions may form hydrated ions in the water, depending on the temperature and concentration. For example, the hydrated form of MnO4- is MnO4-·H2O.
Overall, the large crystal of potassium manganate will dissolve in cold water, resulting in a purple or pink solution.
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