Problem: Predict the shape, state the hybridization of the central atom, and give the ideal bond angle(s) and any expected deviations for BiF52−.

🤓 Based on our data, we think this question is relevant for Professor Gonzalez's class at UM.

FREE Expert Solution

Step 1: Bi (EN = 2.02) is less electronegative than F (EN = 3.98) which makes it the central atom.



Step 2: The -2 charge on BiF52- indicates that the molecule has gained 2 electrons

The total valence electrons of BiF52- is:

          Group          Valence Electrons

Bi      5A                1 x 5 e- = 5 e-

F       7A                5 x 7 e- = 35 e-

                               + 2 e-

Total: 42 valence e-



Step 3: Halogens like F, forms only 1 bond when not acting as a central atom. Bismuth is found below period 2 and can have an extended octet. Distribute the remaining electrons on the terminal atom first. Excess electrons are placed on the central atom.



Step 4: Bismuth is surrounded by 6 electron groups: 5 F atoms and 1 electron pair.

Recall:

Electron Regions   Hybridization         Electronic Geometry          Bond Angles

  2                             sp                                          linear                                     180°

  3                             sp2                                  trigonal planar                           120°

  4                             sp3                                    tetrahedral                              109.5°

  5                             sp3d                          trigonal bipyramidal           90°, 120°, and 180°

  6                             sp3d2                                octahedral                         90° and 180°


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Problem Details

Predict the shape, state the hybridization of the central atom, and give the ideal bond angle(s) and any expected deviations for BiF52.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Hybridization concept. You can view video lessons to learn Hybridization. Or if you need more Hybridization practice, you can also practice Hybridization practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Gonzalez's class at UM.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.