chemistry

Simple Method for writing Lewis Electron Dot Structures of the phosphite ion(PO3)-1 Home > Lewis structures and the Octet rule > Simple Method for writing Lewis Structures of the phosphate ion (PO 4 ) -3 > Simple Method for writing Lewis Electron Dot Structures of the phosphite ion(PO 3 ) -1 Lewis Structures of the Phosphite Ion (PO 3 ) -1 A simple method 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 inthis post. Let us consider the case of the Lewis structures of phosphite ion PO 3 - . Step 1 : The central atom will be the P atom since it is the less electronegative. Connect the atoms with single bonds: 3 -1 atoms connecte...

Lewis Electron Dot Structure of chromic acid H2CrO4 Home > Lewis structures and the Octet rule > Lewis Electron Dot Structures of dichromate Cr 2 O 7 -2 > Lewis Electron Dot Structure of the chromate anion CrO 4 -2 > Lewis Electron Dot Structure of chromium trioxide CrO 3 2 > Lewis Electron Dot Structure of chromic acid H 2 CrO 4 Lewis Electron Dot Structure of Chromic Acid H 2 CrO 4 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 chromic acid H 2 CrO 4 . Chromic acid is a strong acid and...

Most of the time the population mean differs from the mean of each individual sample taken from the population. Consider the following example where absorbance of a solution containing a known concentration of substance A was determined by U.V./Visible spectrometer. The absorbance of the solution was measured three times during each experiment and the average value, standard deviation s and 2s was calculated (see Table I.1). Table I.1: Absorbance values measured for a solution A using a U.V./Visible spectrometer. Three consecutive measurements were recorded during each experiment. The mean values from Table I.1 were plotted in the graph shown in Fig. 1 below and 2s (2 * standard deviation s) is shown for each mean. As can you see, the mean value calculated for the absorbance of A in each experiment (sample of the population) differs from the mean of the population (red line). Please also note that the interval - solid line above and below the mean in each experiment (Fig. 1) -   ...