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Experiment 1 Separation of a mixture of sand and salt Apparatus : beaker, filter funnel, filter paper, glass rod ,stirrer, watch glass Chemical : water, table salt (s____ c_____) Steps Diagram Steps S____ / D___ A m____ of sand and table salt is given. The first step is to d____ the salt by adding suitable amount of w____. The sand is dissolved in w____ to form a salt s____ while the sand is not soluble (i______) in water and stay at the bottom of the beaker. F____ / F_____ The m_____ of salt s____ and sand is slowly poured into a f____ f____ with a f____ paper. The i____ sand stays on the f____ p____ as the r____. The sand could be washed with water first, and it could be dried in an o____ or under the sunlight. The salt s____ can pass through the f____ p____ and it is collected on a w_____ g_____. The liquid which can pass through the f_____ p_____ is called the f_____ . E____ Finally, the salt s_____ is left in the air. Water will e_____ and salt c_____ may appear after a few hours or a few days. Result : Sand and salt is separated. Experiment 2 Endothermic Reaction Apparatus : test tube, thermometer Chemical : water, table salt (s____ c_____) Steps Diagram Steps Result : The initial temperature of the water is ____ and the final temperature of the solution is _____ . Conclusion : When table salt is added to water, there is a _____ in temperature. This is an _____ reaction, which means energy is a_____ from the surrounding. Experiment 3 Exothermic Reaction Apparatus : test tube, thermometer Chemical : dilute sulphuric acid, metal magnesium Steps Diagram Steps Result : The initial temperature of the acid is ____ and the final temperature of the solution is _____ . Conclusion : When a piece of magnesium ribbon is added to acid, there is a _____ in temperature. This is an _____ reaction, which means energy is r_____ (energy is given out) to the surrounding.