Question 1

Given the Lewis structure shown for $$\mathrm{$$BCl_3$$}$$, what is the molecular geometry (shape) of this molecule?

Accepted Answer

Trigonal planar

Question 2

Based on the Lewis structure of $$\mathrm{$$BCl_3$$}$$, what is the bond angle between the chlorine atoms?

Accepted Answer

$$120^\circ$$

Question 3

Considering the symmetry and electronegativity of the atoms in $$\mathrm{$$BCl_3$$}$$, is the molecule polar or non-polar?

Accepted Answer

Non-polar, because the molecule is symmetrical and the dipoles cancel

Question 4

How many valence electrons are present in the Lewis structure of $$\mathrm{$$BCl_3$$}$$?

Accepted Answer

24

Question 5

Which statement best explains why $$\mathrm{$$BCl_3$$}$$ does not have a dipole moment?

Accepted Answer

The molecule is trigonal planar and symmetrical, so the bond dipoles cancel

Question 6

If one chlorine atom in $$\mathrm{$$BCl_3$$} is $$replaced with a fluorine atom, what will happen to the polarity of the molecule?

Accepted Answer

The molecule will become polar

Question 7

What is the formal charge on the boron atom in the Lewis structure of $$\mathrm{$$BCl_3$$}$$?

Accepted Answer

0

Question 8

Which of the following best describes the hybridization of the central atom in $$\mathrm{$$BCl_3$$}$$?

Accepted Answer

$$sp^2$$

Question 9

If $$\mathrm{$$BCl_3$$}$$ reacts with ammonia ($$\mathrm{NH_3$}$$), what type of bond is formed between boron and nitrogen?

Accepted Answer

Coordinate covalent bond

Question 10

Which of the following statements about $$\mathrm{$$BCl_3$$} is $$correct?

Accepted Answer

$$\mathrm{$$BCl_3$$}$$ has an incomplete octet on boron

Introductory Chemistry Exam Study Guidance (Chapters 8, 9, 10)

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