CHEM 115 HW 5 - 1. 1/1 points All Submissions Notes...

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Unformatted text preview: 1. 1/1 points All Submissions Notes Question: ZumChemP6 17.E.014. Calculate the sodium ion concentration when 65.0 mL of 3.2 M sodium carbonate is added to 25.0 mL of 1.6 M sodium bicarbonate. M 2. 1/1 points All Submissions Notes Question: ZumChemP6 17.E.018. A bottle of wine contains 12.5 % ethanol by volume. The density of ethanol (C 2 H 5 OH) is 0.789 g/cm 3 . Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent molality m 3. 1.5/1.5 points All Submissions Notes Question: ZumChemP6 17.E.026. (a) Use the following data to calculate the enthalpy of hydration for calcium chloride and calcium iodide. calcium chloride kJ calcium iodide kJ (b) Based on your answers to part (a), which ion, Cl - or I - , is more strongly attracted to water? iodide chloride *Lattice energy was defined in Chapter 8 as the energy change for the process M + ( g ) + X - ( g ) MX( s ). 4. 1.5/1.5 points All Submissions Notes Question: ZumChemP6 17.E.028. Which ion in each of the following pairs would you expect to be more strongly hydrated? (a) Mg 2+ Na + Why? (b) Be 2+ Mg 2+ Why? (c) Fe 3+ Fe 2+ Why? (d) F- Br- Why? (e) Cl - ClO 4- Why? (f) ClO 4- SO 4 2- Why? 5. 1.5/1.5 points All Submissions Notes Question: ZumChemP6 17.E.030....
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CHEM 115 HW 5 - 1. 1/1 points All Submissions Notes...

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