Dot Structure of chromium trioxide CrO3

Lewis Electron Dot Structure of chromium trioxide CrO3

Lewis Electron Dot Structure of

Chromium Trioxide CrO3

A simple procedure for writing Lewis electron dot structures is given in a previous article entitled “Lewis Structures and the Octet Rule”. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

Another example  for writing Lewis structures following the above procedure is given below.

Let us consider the case of the Lewis electron dot structures of chromium trioxide CrO3. Chromium is an essential nutrient required for normal sugar and fat metabolism and works primarily by potentiating the action of insulin. It is included in several dietary supplements and vitamins. The chemical formula is CrO3 .

 

Step 1: Connect the atoms with single bonds.

 Fig I.1: The CrO3 atoms connected with single bonds

Step 2: Calculate the # of electrons in π bonds (multiple bonds) using  formula (1) in the article entitled “Lewis Structures and the Octet Rule”. 

Where n in this case is 4. Where V = (6 + 6 + 6 + 6 ) = 24 , V is the number of valence electrons of the molecule. Therefore, P = 6n + 2 – V = 6 * 4 + 2 – 24 = 2

So, there is one double bond in the molecule.

Step 3 & 4: The Lewis resonance structures of chromium trioxide CrO3 are as follows:

Fig. I.2: Lewis electron dot structures of CrO3

 

 

Relevant Posts - Relevant Videos

Lewis Structures|Octet Rule: A Simple Method to write Lewis Structures

Lewis Electron Dot Structure of Chromic Acid H2CrO4

 

 

References

  1. G.N. Lewis, J.A.C.S, 38, 762-785, (1916)
  2. E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
  3. A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)

 

Key Terms

resonance structures of chromium trioxide CrO3, Lewis electron structures of chromium trioxide , chemical formula of chromium trioxide cro3, simple procedure for drawing Lewis structures of chromium trioxide,

 

Comments

Post a Comment

Popular posts from this blog

Carbocations: Factors affecting their Stability

Image
A carbocation is a species where a carbon atom bonds to three carbon atoms and has a positive charge. Carbocations are electron deficient species and therefore very reactive and unstable . Anything which donates electron density to the electron-deficient center will help to stabilize them. Factors that stabilize them are the following:  Neighboring carbon atoms (inductive effect) Neighboring carbon-carbon multiple bonds (resonance effect) Neighboring atoms with lone pairs (resonance effect) How carbocations are stabilized by neighboring carbons atoms? The stability of carbocations decreases as the number of carbons attached to the C+ decreases. That means that tertiary carbocations are more stable than secondary that in turn are more stable than primary (Fig. 1). Fig. 1: Carbocation stability increases as methyl substitution increases around the electron deficient carbon C+. The methyl groups (-CH 3 ) are electron donating and therefore stabilize the positive charge (inductive ...
Read more

Analytical Chemistry - Calibration

Analytical Chemistry - Calibration Home > Analytical Chemistry > Calibration CALIBRATION What is calibration? Calibrated instruments|Analytical Chemistry Calibrating a pH meter using buffers Quantitative Analysis by Atomic Absorption Performance Verification of Analytical Balances according to ISO/IEC 17025 Calibration and Outliers - Statistical Analysis Calibration of an instrument in Analytical Chemistry is the operation that determines the functional relationship between measured values (signal intensities S at certain signal positions zi) and analytical quantities characterizing types of analytes qi and their amount ( content , concentration ) n. Calibration includes the selection of the model (its functional form), the estimation of the model parameters as well as the errors, and their validation. During calibration , the in...
Read more

Self-ionization of water - Autoionization of water - The ion product of water (kw)

Image
Self-ionization of water - Autoionization of water - The ion product of water (kw) Home > Weak Acids and Bases – Calculate the pH of a weak acid (a general equation) > Solving Weak Acid and Weak Base pH problems > Weak Acid Weak Base pH calculation solved example > Weak Acid Weak Base pH calculation solved example > Cubic Equation Calculator for Weak Acid-Base Equilibria > Polyprotic Acids / pH Calculation > Self-ionization of water - Autoionization of water - The ion product of water (kw) Self-ionization of water - Autoionization of water - The ion product of water (kw) A water molecule can act as an acid and as a base according to: In the above reaction – autoionization of water - one water molecule acts as an acid donating a proton to the other water molecule that acts as a base – proton acceptor. From the equation we see that for every hydronium ion H 3 O + that is formed a hydroxyl ion...
Read more