Which element is oxidized in the reaction below? H Fe Cr O Lewis base Bronsted-L

Question

Which element is oxidized in the reaction below? H Fe Cr O Lewis base Bronsted-Lowry add Arrhenius acid produces protons in aqueous solution proton donor electron pair donor What is the predominant intermolecular force in CH_3CH_2OH? ion-dipole attraction induced dipole-dipole attraction ionic bonding London-dispersion forces hydrogen-bonding A 0.100 m aqueous solution of which one of the following solutes will have the lowest vapor pressure water? NaCl Al(ClO_4)_3 Ca(ClO_4)_2 KClO_4 sucrose The concentration of fluoride ions in a saturated solution of barium fluoride is ________ M. The solubility product constant of BaF_2 is 1.7 times 10^-6. 3.8 times 10^-4 7.5 times 10^-3 3.0 times 10^-3 1.5 times 10^-2 1.4 times 10^-4

Explanation / Answer

1) B ; Fe is oxidized

2) Lewis base - electron pair donor

3) Bronsted - Lowry acid - Proton donor

4) Arrhenius acid - produces protons in aqueous solutions

5) E ; hydrogen bonding

6) B ; Al(ClO4)3 Vanthoff factor is greater for this i = 4

7) B

BaF2 = Ba2+ + 2F-

Ksp = [S][2S]2 = 4S3

4S3 = 1.7 x 10-6

S = (0.425x10-6)1/3 = 0.75 x 10-2 = 7.5 x 10-3

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