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77-Conduct-Problems-Ans

77-Conduct-Problems-Ans - water has no ions to conduct...

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ELECTRICAL CONDUCTANCE OF WATER SOLVENT SOLUTIONS LAB CONCEPT PROBLEMS Circle the chemical compound form the “set” of compounds which has the higher electrical conductance and explain the reasons for your choice. 1) 0.05 M NaCl. Versus 1.0 M Sucrose (C 12 H 22 O 11 ): Reason: Molecular compounds like sucrose do not form ions in aqueous solution. 2) 0.25 M AlCl 3 Versus 0.55 M AlCl 3 : Reason: 0.55 M AlCl 3 has a higher concentration of ions than 0.25 M AlCl 3 3) 0.75 M AgCl Versus 0.75 M NaCl: Reason: Based on TABLE of anion/cation conductivity, Ag is more conductivity than Na. 4) 0.04 M NaB r Versus 0.04 M NaNO 3 : Reason: Based on TABLE of anion/cation conductivity, Br is more conductive than NO 3 5) Hot Tap H 2 O Versus De-Ionized H 2 O: Reason: By definition De-Ionized
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Unformatted text preview: water has no ions to conduct electricity. 6) 0.50 M HCl Versus 0.550 M Acetic Acid (HC 2 H 3 O 2 ): Reason: HCl is strong acid & ionizes 100% while acetic acid is a weak acid & ionizes ~ 1%. 7) 0.50 M NaOH Versus 0.10 M KOH: Reason: NaOH is 5 times more concentrated than KOH making it better conductor of electricity. 8) 0.50 M NaCl Versus 0.10 M Boric Acid (H 3 BO 3 ): Reason: NaCl ionic compound that ionized 100% is better conductor than a weak acid. 9) Tap H 2 O Versus 0.15 M KCl Reason: Tap water has small amount of dissolved salt ions while 015 M KCl has many ions. 10) 0.54 M BaCl 2 Versus Copper Wire Reason: Transition metals (copper) are worlds best conductor of electricity. Jpechunf11/2004...
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