LS #5 (Meeting Daily Needs) is due on Thursday 1/12!

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Presentation transcript:

LS #5 (Meeting Daily Needs) is due on Thursday 1/12! Agenda 1/5/12 Check answers to homework (#2). Solubility Curves. Work on second part of (#2). Work on (#3). Homework: Solubility Curves (#4) Assignment Due Date LS #5 Thursday 1/12 Solutions Quiz Wednesday 1/11 Remote Review Monday 1/23 Unit 5 Exam Tuesday 1/24 Parent Signature Wednesday 1/25 LS #5 (Meeting Daily Needs) is due on Thursday 1/12!

Reading Solubility Curves

Answer the following questions Unsaturated, Saturated or Supersaturated? At a temperature of 45OC and a solubility of 160 grams. Answer: Supersaturated (above curve). At a temperature of 90OC and a solubility of 40 grams. Answer: Unsaturated (below curve). 3. At a temperature of 30OC and a solubility of 55 grams. Answer: Saturated (on curve).

Solutions #1 WS 6.How many grams of NH3 are needed to create a saturated solution at 20OC? Answer: 53 grams

Solutions #1 WS 7. What temperature is needed to create a saturated solution of 50 grams of NH4Cl? Answer: 50OC

Solutions #1 WS 8. How many grams of KCl are needed to create a saturated solution at 65OC? Answer: 47 grams

Solutions #1 WS 9. A solution is prepared by adding 80 grams of NaCl to water at 80OC. Would this solution be unsaturated, saturated or supersaturated? Answer: Supersaturated

Solutions #1 WS 10. A solution is prepared by adding 20 grams of KClO3to water at 30OC. Would this solution be unsaturated, saturated or supersaturated? Answer: Supersaturated

Solubility Curves What is the solubility of KNO3 at 45OC? Answer  74 - 76 grams

Solubility Curves What is the solubility of KNO3 at 55OC? Answer  93 - 97 grams

Solubility Curves 4. A solution is prepared by adding 50 grams of KNO3 to 100 ml of water at 50OC. This solution is (saturated, unsaturated supersaturated). Answer unsaturated

Solubility Curves A solution is prepared by adding 130 grams of KNO3 to 100 ml of water at 23OC. Crystals are seen on the bottom of the flask. This solution is (saturated, unsaturated supersaturated). Answer  supersaturated

Solubility Curves 6. A solution is prepared by adding 50 grams of KNO3 to 100 ml of water at 30OC. This solution is (saturated, unsaturated supersaturated). Answer  saturated

Solubility Curves 7. A solution is prepared by adding 100 grams of KNO3 to 200 ml of water at 50OC. This solution is (saturated, unsaturated supersaturated). Answer  unsaturated