an experiment to show the presence of dissolved salts in tap water
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tap water contains dissolved salts.
Take a small quantity of tap water in a watch glass. Keep the watch glass on a beaker filled with water. Heat the beaker. The water on watch glass will evaporate on heating. Let it cool for some time. When the watch glass is seen in light, a number of concentric rings of solid matter are seen. These are deposits of dissolved salts left after evaporation of tap water.
b) tap water contains dissolved gases.
Take water in a round bottomed flask and fit a delivery tube in the flask using a cork. Put the other end of the delivery tube in an inverted graduated tube filled with water and placed in a beaker. On heating the water in round bottomed flask, gas bubbles are seen escaping from the flask. These bubbles pass through the delivery and collect in the inverted graduated tube.
Take a small quantity of tap water in a watch glass. Keep the watch glass on a beaker filled with water. Heat the beaker. The water on watch glass will evaporate on heating. Let it cool for some time. When the watch glass is seen in light, a number of concentric rings of solid matter are seen. These are deposits of dissolved salts left after evaporation of tap water.
b) tap water contains dissolved gases.
Take water in a round bottomed flask and fit a delivery tube in the flask using a cork. Put the other end of the delivery tube in an inverted graduated tube filled with water and placed in a beaker. On heating the water in round bottomed flask, gas bubbles are seen escaping from the flask. These bubbles pass through the delivery and collect in the inverted graduated tube.
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tap water contains dissolved salt. Take a small quantity of tap water glass on a beaker filled with water when the watch glass is seen in light a number of concentric rings of solid matter are seen.
These are deposited of deposits of dissolved salt left after evaporation of tap water.
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