Drop a crystal of copper sulphate or potassium permanganate into a glass of hot water and another containing cold water. Do not stir the solution. Allow the crystals to settle at the bottom.
What do you observe just above the solid crystal in the glass?
What happens as time passes?
What does this suggest about the particles of solid and liquid?
Does the rate of mixing change with temperature? Why and how?
What do you observe just above the solid crystal in the glass?
What happens as time passes?
What does this suggest about the particles of solid and liquid?
Does the rate of mixing change with temperature? Why and how?
When crystals are added in a glass of cold and hot water, the following observations are observed:
i) In a glass of cold water, the crystals settle down to the bottom and in case of hot water, it slowly spreads. The crystals can be observed dissolving in the water just above and blue/ purple color is observed.
ii) After some time, the hot water becomes blue/purple and in cold water, no appreciable color change is observed because of less dissolution of crystals.
iii) From the above observation, we can conclude that particles of matter move continuously and possess kinetic energy. The particles of matter also have diffusion property.
iv) As the kinetic energy of particles depends on temperatures and increases with the increase of temperature. So, the rate of mixing also increases as observed in the case of hot and cold water.
When crystals are added in a glass of cold and hot water, the following observations are observed:
i) In a glass of cold water, the crystals settle down to the bottom and in case of hot water, it slowly spreads. The crystals can be observed dissolving in the water just above and blue/ purple color is observed.
ii) After some time, the hot water becomes blue/purple and in cold water, no appreciable color change is observed because of less dissolution of crystals.
iii) From the above observation, we can conclude that particles of matter move continuously and possess kinetic energy. The particles of matter also have diffusion property.
iv) As the kinetic energy of particles depends on temperatures and increases with the increase of temperature. So, the rate of mixing also increases as observed in the case of hot and cold water.
