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Using the table on page 1, answer the following questions. NaCl is [more / less] soluble at low temperatures than at high temperatures. Sand is [soluble/ slightly soluble / nonsoluble] in water at any temperature. How many grams of benzoic acid will dissolve in water at 80°C? What will happen to this benzoic acid if you let the water cool to 0°C?

Using the table on page 1, answer the following questions. NaCl is [more / less] soluble at low temperatures than at high temperatures. Sand is [soluble/ slightly soluble / nonsoluble] in water at any temperature. How many grams of benzoic acid will dissolve in water at 80°C? What will happen to this benzoic acid if you let the water cool to 0°C?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. Using the table on page 1, answer the following questions. NaCl is [more/ less] soluble at low temperatures than at high temperatures. Sand is [soluble/ slightly soluble / nonsoluble] in water at any temperature. How many grams of benzoic acid will dissolve in water at 80°C? What will happen to this benzoic acid if you let the water cool to 0°C? 2. Was your percent recovery greater than 100% or less than 100%? Give some possible reasons why you didn't achieve exactly 100% recovery. Be specific-don't just say "human error." 3. Define the following terms: Solubility - Decantation (to decant) - 4. What is the name of the piece of equipment (a special type of funnel) used for vacuum filtration? 5. In step 3 you heat the mixture; in step 4 you quickly decant the liquid while it is still hot and use hot water to wash the sand. What is the purpose of heating the mixture and then decanting while it is still hot (rather than letting it cool before decanting)? 6. Why do you put the liquid in an ice bath in step 7 and use ice-cold water (rather than warm water) for rinsing in step 9?
Transcribed Image Text:1. Using the table on page 1, answer the following questions. NaCl is [more/ less] soluble at low temperatures than at high temperatures. Sand is [soluble/ slightly soluble / nonsoluble] in water at any temperature. How many grams of benzoic acid will dissolve in water at 80°C? What will happen to this benzoic acid if you let the water cool to 0°C? 2. Was your percent recovery greater than 100% or less than 100%? Give some possible reasons why you didn't achieve exactly 100% recovery. Be specific-don't just say "human error." 3. Define the following terms: Solubility - Decantation (to decant) - 4. What is the name of the piece of equipment (a special type of funnel) used for vacuum filtration? 5. In step 3 you heat the mixture; in step 4 you quickly decant the liquid while it is still hot and use hot water to wash the sand. What is the purpose of heating the mixture and then decanting while it is still hot (rather than letting it cool before decanting)? 6. Why do you put the liquid in an ice bath in step 7 and use ice-cold water (rather than warm water) for rinsing in step 9?
The amounts of sand, salt, and benzoic acid that will dissolve in 100 g of water at different temperatures: 0°℃ Og 0.17 g Temp. Sand Benzoic Acid NaCl 36 g 20°C Og 0.29 g 36 g 40°C Og 0.42 g 37 g 60°C Og 1.2 g 37 g 80°C Og 2.8 g 38 g 100°C Og 78 40 g
Transcribed Image Text:The amounts of sand, salt, and benzoic acid that will dissolve in 100 g of water at different temperatures: 0°℃ Og 0.17 g Temp. Sand Benzoic Acid NaCl 36 g 20°C Og 0.29 g 36 g 40°C Og 0.42 g 37 g 60°C Og 1.2 g 37 g 80°C Og 2.8 g 38 g 100°C Og 78 40 g
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