Effect of Temperature on Solubility Lab
Effect of Temperature on Solubility Lab
Purpose: What is the solubility of minerals in water? What is the relationship between temperature and solubility?
Hypothesis: If salt and sugar are each tested in water of varying temperatures, then salt and sugar's solubility will increase as the temperature also increases.
Materials: Two 250 mL beakers Tap water 100 mL graduated cylinder Hot plate Two petri dishes Glass stirring rod Salt Sugar Thermometer Ice Balance Scoopula Graph Paper Procedure:
Part 1(Tap Water) Measure 100 mL of tap water in a graduated cylinder and add the water to a 250 mL beaker. Use the balance to measure the mass of a Petri dish and record the mass in grams. Add salt to the petri dish until the mass is about 75 g. Record the mass to the nearest tenth of a gram. Use the scoopula to add a small amount of salt from the petri dish(about 5 grams) to the 250 mL of water. Stir the salt in the water with a glass stirring rod until completely dissolved, about two minutes. After the previous salt has been dissolved(no settling at the bottom of the beaker), add more about 5 more grams of salt and repeat step number four. Continue steps 4,5,6 until saturated, no more will dissolve. Place the thermometer in the saturated solution and record the final temperature. Weigh the remaining salt in the petri dish with the balance and record. Repeat steps 1-9 with sugar instead of salt.
Part 2(Cold Water) Add 100 mL of water and about six pieces of ice to a 250 mL beaker. Use the balance to measure the mass of a Petri dish and record the mass in grams. Add salt to the petri dish until the mass is about 75 g. Record the mass to the nearest tenth of a gram. Use the scoopula to add a small amount of salt from the petri dish(about 5 grams) to the 250 mL of water and ice. Stir the salt in the ice water with a glass stirring rod until
Purpose: What is the solubility of minerals in water? What is the relationship between temperature and solubility?
Hypothesis: If salt and sugar are each tested in water of varying temperatures, then salt and sugar's solubility will increase as the temperature also increases.
Materials: Two 250 mL beakers Tap water 100 mL graduated cylinder Hot plate Two petri dishes Glass stirring rod Salt Sugar Thermometer Ice Balance Scoopula Graph Paper Procedure:
Part 1(Tap Water) Measure 100 mL of tap water in a graduated cylinder and add the water to a 250 mL beaker. Use the balance to measure the mass of a Petri dish and record the mass in grams. Add salt to the petri dish until the mass is about 75 g. Record the mass to the nearest tenth of a gram. Use the scoopula to add a small amount of salt from the petri dish(about 5 grams) to the 250 mL of water. Stir the salt in the water with a glass stirring rod until completely dissolved, about two minutes. After the previous salt has been dissolved(no settling at the bottom of the beaker), add more about 5 more grams of salt and repeat step number four. Continue steps 4,5,6 until saturated, no more will dissolve. Place the thermometer in the saturated solution and record the final temperature. Weigh the remaining salt in the petri dish with the balance and record. Repeat steps 1-9 with sugar instead of salt.
Part 2(Cold Water) Add 100 mL of water and about six pieces of ice to a 250 mL beaker. Use the balance to measure the mass of a Petri dish and record the mass in grams. Add salt to the petri dish until the mass is about 75 g. Record the mass to the nearest tenth of a gram. Use the scoopula to add a small amount of salt from the petri dish(about 5 grams) to the 250 mL of water and ice. Stir the salt in the ice water with a glass stirring rod until