Chemistry With Friends

Magic tricks to find Hybridization Understand the following formula (X) X= ( number of valence electron on central atom+ negative charge -positive charge +no of monovalent atom) Note: The number of monovalent atom mean, having one valency belong to group 1 and 17 ( H, F, Cl, Br) +and–sign on ion will not be counted but values of charge will counted, Such as in CO 3 2- , we will consider value 2 but sign( –) will not be counted. Different X values with different hybridization are shown below (table 1) Table.1 Different X values with different hybridization Example: 1. NH 3 X= ½ (5+ 0 – 0 + 3) = 4 Sp 3 2. CO 3 2- X= ½ (4+ 2– 0 + 0) = 3 Sp 2 3. NH 4 1+ X= ½ (5+ 0– 1 + 4) = 4 Sp 3 4. XeO 2 F 2 X= ½ (8+ 0– 0 + 2) = 5 Sp 3 d Fig.1 Hybridization of ammonia and carbonate Note: This works in at least 98% o

University of Okara latest jobs

jobs for detail click on link https://uo.edu.pk/public/uploads/jobs/1589971507.pdf

Why homemade food spoilage and rancid quickly but market food do not spoilage for several months

Food spoilage: The food in the market do not spoilage for several months, and homemade food spoilage because, chemist add chemical food preservatives , which we do not add at home. The most popular chemical food preservatives are given below. 1. Sodium sorbate 2. Potassium sorbate 3. Sodium benzoate 4. Sorbic acid 4. Calcium sorbate