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6. (a) Ethylene glycol (EG), CH:(OH)CH2(OH), is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.pt. 197 °C; molar mass 62.01 g;). Calculate the freezing point of a solution containing 651 g of this substance in 2505 g of water, K¢ of water is 1.86 °C/m). (b) Would you keep this substance in your car radiator during the summer?

6. (a) Ethylene glycol (EG), CH:(OH)CH2(OH), is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.pt. 197 °C; molar mass 62.01 g;). Calculate the freezing point of a solution containing 651 g of this substance in 2505 g of water, K¢ of water is 1.86 °C/m). (b) Would you keep this substance in your car radiator during the summer?

Chemistry
Chemistry
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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
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### Educational Chemistry Problems #### 6. Ethylene Glycol and Freezing Point Depression (a) Ethylene glycol (EG), CH₂(OH)CH₂(OH), is commonly used as automobile antifreeze. It is water soluble and relatively nonvolatile (boiling point: 197 °C; molar mass: 62.01 g/mol). Calculate the freezing point of a solution containing 651 g of this substance in 2505 g of water. The cryoscopic constant \( K_f \) of water is 1.86 °C/m. (b) Would you consider using this substance in your car radiator during the summer? Provide reasoning for your answer. #### 7. Acidity of Aqueous Solutions Predict whether the aqueous solutions of the following compounds are acidic, basic, or neutral, providing reasons for your predictions: (i) HCl (ii) KBr (iii) Ethyl alcohol (iv) NH₄OH #### 8. Decomposition of Ethane to Methyl Radicals The decomposition of ethane (C₂H₆) to methyl radicals (CH₃•) is described by the first-order reaction with a rate constant of 5.36 × 10⁻⁴ s⁻¹ at 700 °C. \( \text{C}_2\text{H}_6 \, (g) \rightarrow 2 \, \text{CH}_3^• \, (g) \) Calculate the half-life of the reaction in minutes.
Transcribed Image Text:### Educational Chemistry Problems #### 6. Ethylene Glycol and Freezing Point Depression (a) Ethylene glycol (EG), CH₂(OH)CH₂(OH), is commonly used as automobile antifreeze. It is water soluble and relatively nonvolatile (boiling point: 197 °C; molar mass: 62.01 g/mol). Calculate the freezing point of a solution containing 651 g of this substance in 2505 g of water. The cryoscopic constant \( K_f \) of water is 1.86 °C/m. (b) Would you consider using this substance in your car radiator during the summer? Provide reasoning for your answer. #### 7. Acidity of Aqueous Solutions Predict whether the aqueous solutions of the following compounds are acidic, basic, or neutral, providing reasons for your predictions: (i) HCl (ii) KBr (iii) Ethyl alcohol (iv) NH₄OH #### 8. Decomposition of Ethane to Methyl Radicals The decomposition of ethane (C₂H₆) to methyl radicals (CH₃•) is described by the first-order reaction with a rate constant of 5.36 × 10⁻⁴ s⁻¹ at 700 °C. \( \text{C}_2\text{H}_6 \, (g) \rightarrow 2 \, \text{CH}_3^• \, (g) \) Calculate the half-life of the reaction in minutes.
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