Johntech Academy

  Oxidation-reduction (Redox reaction) reactions involve the transfer of electrons between substances. They take place simultaneously because if one substance loses electrons, another must gain them.    Redox reactions involve two opposing yet complementary processes:  OXIDATION AND REDUCTION.   For example, all single-replacement reactions are redox reactions. We often come across processes like; Rusting of iron particles,  Fading of the colour of the clothes,  Burning of combustible substances such as cooking gas, wood, coal, etc.    All these processes fall in the category of redox reactions. A large number of industrial processes such as; Electroplating,  Extraction of metals like aluminium and sodium, Bleaching of wood pulp,  Manufacture of caustic soda, etc. are also based on the redox reactions. Redox reactions also form the basis of electrochemical and electrolytic cells.  Electrochemistry is the study of the interchang...

    The history of the atom. The concept of the atom dates back to ancient Greece, when philosophers like Democritus and Leucippus postulated that matter was made up of indivisible, indestructible particles.  Later, scientists like Robert Boyle and Antoine Lavoisier explored the properties of matter and laid the foundation for the modern understanding of the atom.  In 1897, J.J. Thomson discovered the first subatomic particle, the electron. Which led to a new model of the atom called the "plum pudding model.    After Thomson's discovery of the electron, scientists began to piece together a more accurate model of the atom.  In 1911, Ernest Rutherford proposed the "nuclear model" of the atom, which stated that the positive charge of the atom was concentrated in a small, dense nucleus.   Rutherford's model was a huge step forward, but it still had some problems. For example, it couldn't explain why the atom was stable, or why electrons didn't cr...

    Studying chemistry can be a challenging and rewarding experience. However, it's important to have a strategy for studying so that you can make the most of your time and effort.    In this post, we'll explore some tips for success when studying chemistry. By following these tips, you can improve your understanding of the subject and get better results on your tests. Ready to dive in? 1. Studying for test:-   When you're studying for a chemistry test, it's important to break the material down into small chunks. This will make it easier to digest and retain the information.    You can do this by dividing the material into sections, such as topics or chapters, and studying one section at a time. It's also helpful to use flashcards to review key concepts. This will help you to test your understanding and identify any areas that you need to focus on. 2. Reviewing concepts:-   To review the concepts you've learned, it's helpful to use mnemonic device...