Question

Prepare various solution with different density by adding some drop of ink in different amount of water and explain the principle involved in it to your friends

Answer 1

click in the picture

and hope it's help

Answer 2

Details on preparation of different concentrations of ink-water solution are as follows.  

The main principle behind the mixture of ink and water are:  

-Collision of molecules  

-Diffusion  

-Random movement of molecules  

Process:  

When drops of ink are added to water, the water molecules make random movement and collide with the ink molecules. Now, the ink molecules also make random movement and move from area of higher to lower concentration of molecules. Thus, it forms a colloidal solution of ink and water.  

Rate of diffusion depends on temperature of water. When water is hot, diffusion occurs fast

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