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12 A student placed a crystal of copper (11) sulphate in a beaker of water.
After one hour the crystal had completely disappeared and a dense blue colour was
observed in the water at the bottom of the beaker. After 48 hours the blue colour had spread
throughout the water.
water-
copper(II) sulphate
after 1 hour
les crystal
(a) Use the kinetic particle theory to explain these observations.