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Chapter 12 Lecture 2

Chapter 12 Lecture 2 - CO(NH 2 2 Energetics of Solubility...

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Molality - moles of solute/kg solvent Phosphoric acid is solution is 75% H 3 PO 4 by mass. What is the molarity molality of this solution? The density of the solution is 1.57 g/mol.
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Mole fraction (Xi) - Moles on one component / total moles present Already discovered in Dalton’s Law of partial pressure. .... 3 2 1 1 1 n n n n X + + = What is the mole fraction of a solution that is 25% urea by mass?
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Unformatted text preview: CO(NH 2 ) 2 Energetics of Solubility Scene 1 Scene 2 Scene 3 Solute Solvent ΔH1 Scene 1 ΔH2 ΔH3 Energy goes into the chemical to break bonds. Energy goes out of the chemicals when bonds are formed. DP’s Chicken Cookin’ Days NaOH + H 2 O → NaOH aq-∆ H NH 4 NO 3 + H 2 O → NH 4 NO3 + ∆ H...
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