<p>Types of Solutions Lab</p><p>Name: ______Date: ______</p><p>Problem: How can you tell the difference between an unsaturated, saturated, and supersaturated solution?</p><p>Materials: 10ml graduated cylinder, test tube, spoon, hot plate, 250 ml beaker, water, sodium acetate (NaAc)</p><p>Procedure: </p><p>1. Use a graduated cylinder to add 2.5 ml of water to your test tube, then add approximately 3 crystals of sodium acetate (NaAc) and swirl until the NaAc is dissolved. 2. Add approximately 3 more crystals and swirl. a. Did they dissolve? ______b. If so, was the solution saturated at first? ______c. Can you tell if it is saturated now? ______3. Add 1 level spoonful of NaAc and swirl for at least 1 minute. a. Did the temperature change? If so, how? ______4. Add approximately 1 crystal and swirl 1 minute. a. Did this crystal dissolve? ______b. Can you tell if it is saturated now? ______5. Add 4 more level spoonfuls of crystals and heat the test tube in a water bath until the crystals dissolve. Swirl periodically while heating to dissolve all crystals. 6. Put approximately 200ml of very cold water in to a 250 ml beaker and place the test tube in the water. Let stand for 5 minutes. DO NOT DISTURB while standing! If crystals form in this time, reheat to dissolve, and then cool again. 7. Take the test tube out of the water and add 1 crystal of NaAc. a. What happened? ______b. Did the temperature change? If so, how? ______8. Rinse out the test tube (heat if necessary) and return all materials to where you got them. Types of Solutions Lab</p><p>Name: ______Date: ______</p><p>Conclusion Questions: 1. What experiment could you do after step 5 to determine whether or not the solution was saturated? </p><p>2. After completing step 7, how would you describe the saturation of the solution?</p><p>3. Explain the observed temperature changes as the NaAc dissolved and then crystallized. a. Did the temperature change of the NaAc dissolving in step 3 indicate that energy was going in to or out of the water? ______</p><p> b. Does this mean that the NaAc gained or lost energy when it was dissolving? Describe the change in movement of the NaAc particles to support your answer.</p><p> c. Did the temperature change of the NaAc crystallizing in step 7 indicate that energy was going in to or out of the water? ______</p><p> d. Does this mean that the NaAc gained or lost energy when it was crystallizing? Describe the change in movement of the NaAc particles to support your answer.</p>