# chm21 - 1 Which substance is more soluble in water In...

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1. Which substance is more soluble in water? In hexane? a) ethanol (CH 3 CH 2 OH) or hexanol (CH 3 CH 2 CH 2 CH 2 CH 2 CH 2 OH) b) toluene (C 7 H 8 ) or oxalic acid (HOCOCOOH) 2. Which solvent will dissolve more of the given solute? a) NaCl in methanol (CH 3 OH) or propanol (CH 3 CH 2 CH 2 OH) b) ethylene glycol (HOCH 2 CH 2 OH) in hexane (C 6 H 14 ) or H 2 O c) diethyl ether (CH 3 CH 2 OCH 2 CH 3 ) in H 2 O or ethanol d) I 2 gas in H 2 O or CCl 4 3. If ΔH latt of KBrO 3 = – 745 kJ/mol and the combined ΔH hyd = – 704 kJ/mol, what is the ΔH soln for the dissolution of KBrO 3 in water?

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The solubility of NH 4 Cl at 20°C = 37g NH 4 Cl / 100 g H 2 O. If a solution is prepared by dissolving 95 g of NH 4 Cl in 200.0 g H 2 O at 60°C, what mass of NH 4 Cl will recrystallize when the solution is cooled to 20°C? 1. What is the molality of a 5.00 M HCl(aq) solution? (d = 1.10 g/mL) What is the mole fraction of HCl in this solution?
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## This note was uploaded on 01/30/2011 for the course CHEM 2035 taught by Professor Brown during the Spring '10 term at University of Florida.

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chm21 - 1 Which substance is more soluble in water In...

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