On a hot summer day we feel like drinking something cold. And if the drink is it is sweet it so much better. Today we will examine whether SUGAR dissolves more in cold water or in hot water. Take two glasses. Fill one with cold water and the second with hot water. Drop a sugar cube in each glass. Then wait and see in which glass the cube dissolves first. You will see that there is much more activity in hot as compared to cold water. The sugar cube will dissolve much more quickly in hot water. If you don’t have sugar cubes you can repeat this experiment with ordinary sugar.
We will repeat the cold and hot experiment now with SALT. Place a teaspoon of salt both in the hot and cold glass. See in which glass the salt dissolves first. This time your observations will be different. Does the salt dissolve quickly in hot water? Observe carefully and try and answer why?

This work is supported by IUCAA (www.iucaa.in) and TATA Trust (www.tata.com/aboutus/sub_index/Tata-trusts)

Credits:,Ashok Rupner, Manish Jain, Pradnya Pujari, Shivaji Mane, Jyoti Hiremath, Arvind Gupta, Vidula Mhaiskar TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org

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