Properties of Oxygen and Hydrogen
This lesson covers the properties, preparation, and tests of oxygen and hydrogen gases. It explains the role of these gases in the environment and their reactions with other elements. The lesson also includes information on the physical states of oxygen.
- 08:52 “You can prepare oxygen by decomposing of hydrogen peroxide. When you have hydrogen peroxide, if you want to decompose it, breaking it into two is a chemical process, but decomposing it will give you water and oxygen. Fro...”
- 02:23 “Oxygen forms compounds by reacting with practically any other element. So oxygen can be had with hydrogen and it is going to give you water. So oxygen can react with any element. So oxygen in its normal state from the pi...”
- 06:28 “Oxygen also combines with elements at room temperature, for example, the formation of rust. And water falls on iron, and it's exposed to oxygen. That iron begins to undergo chemical reaction, and it is called roasting. D...”
Metals and their compounds
This lesson covers the characteristics of metals, including their ability to lose electrons and form positive ions. It discusses the classification of metals, their physical properties, and examples of common metals such as sodium, magnesium, and aluminum. The lesson also includes information on the
- 18:43 “with the Ozzides. Ozzides ion to release the electrons necessary for reduction of the matter. What am I talking about? So carbon of the A, carbon that reacts with the oxygen gives us CO which is carbon two or that plus t...”
- 09:07 “All OZI of no Metas are referred to as what? As a hydride. For example, we have CO2. This is a hydride, SO2, a hydride and when they dissolve in water. These are acidic OZI. Acid because they will tone blue, it won't sep...”
- 16:23 “is CC, we have CC electron. So give you, you can always remember that oxygen is the atomic. Meaning the oxygen is the gas. All gases are the atomic. They can assist as an atom except as a molecule. So writing it this way...”
Oxides of Carbon
This lesson covers the two types of carbon oxides: carbon monoxide and carbon dioxide. It explains their formation, characteristics, and methods of preparation in the laboratory. The lesson also defines the term allotrope and discusses the economic importance of these oxides.
- 20:54 “Basically, when it's raining. So, what we have most time is actually the form of acid that is formed, there is a weak acid. It's all called carbonic acid, basically, okay? Which has a pH of five, okay? That, this equatio...”
- 10:52 “So, now, the air containing even less than 1% of carbon monosa, okay, can be fatal. Very, in fact, just 1% of it can be very dangerous of it, okay? When you breathe in, for about 10 to 15 minutes, the person can eventual...”
- 00:48 “Our carbon can be prepared in laboratory. That's carbon two oxides, I mean, all sides of carbon can be prepared in the laboratory. So, the carbon two oxides and carbon four oxides. So, now, basically, we wanna talk about...”
Water and Its Properties
This lesson covers the composition of water, including its chemical formula H2O. It explains the physical properties of water, such as its states (solid, liquid, gas), boiling and melting points, and its ability to dissolve various substances. The lesson also discusses the importance of water in liv
- 06:38 “When two hydrogen atoms are bound to an oxygen atom, the outer electron shell of oxygen is filled. Let's move to decomposition of water. How do we decompose water? I told you before, the main component of water is hydrog...”
- 05:50 “Water molecules made up of two elements, hydrogen atom and oxygen atom. From the picture you would see hydrogen atom and the oxygen atom. A single oxygen atom contains six electrons. If you count, you will notice that yo...”
- 12:19 “You must have seen your geats or some ions that have undergone some chemical reaction. If you look at the picture, you will notice that this picture has undergone the process of roasting. The initial color of the ions ha...”
Chemical Symbols and Formulae
The lesson covers the symbols of the first 20 elements and how to write chemical formulae and equations. It explains the differences between elements, compounds, and mixtures, as well as the concept of radicals and valency. The laws of conservation of mass and constant composition are also discussed
- 14:44 “that nitrogen with balance, nitrogen with balance A. My hydrogen is balanced, my nitrogen is balanced. The next I need to balance is oxygen. How many oxygen do I have now on the product side? I have 3 A, 2 A, making 5 ox...”
- 13:06 “you don't say N2, it should be ordinary, it will be ordinary key, it will be ordinary sodium, which is N8. And then in simple chemical reactions, radicals would be main words. On change, radicals, it's main, on change. I...”
- 16:27 “And on the product side, I actually have 4. I have 6 times 2, 6 times 2, hydrogen. And that's what we give me 12. You can see it's balanced. The last but not the least, which is oxygen 502. 5O2 means 5 times 2. 5 times 2...”
Gas Laws Overview
This lesson covers the basic gas laws including Boyle's Law and Charles's Law. It explains the relationship between volume, pressure, and temperature of gases, and introduces the Kelvin scale for temperature. The general gas equation PV = nRT is also discussed.
- 17:08 “And if we try the question, you are comparing 18 and oxygen, and from the balanced equation, you have two volume of 18 to react with seven volume of oxygen. And you are asked that what volume of oxygen, what volume of ox...”
- 17:59 “of oxygen. I believe you understand that. For marbogadro's law, this is the next law. This is that equal volume of gases at the same temperature and temperature, contain the same number of molecules. Given the, a particu...”
- 16:22 “in simple ratios, one another, and to the volume of the produce, if gaseous, provided at temperature and pressure remains constant. For example, one volume of oxygen is required for the complete combustion of 15 cm cube,...”
Changes of Matter and Atomic Structure
The lesson covers the differences between physical and chemical changes in matter. It explains the concepts of atoms and molecules, their arrangements, and introduces atomic number, mass number, and isotopes. The lesson also includes calculations of relative atomic masses.
- 13:03 “Finally, our molecular formula will simply be C times this 2, H times water times 2, 4, n, o, 2. I believe you understand that, and you can see that from here. The molecular formula is CH2, H4, o2, if you arrange it, you...”
- 11:32 “First, with the empirical formula and your value of n, which are going to determine first, empirical formula times n will be equal to the relatively molecular mass. This is CH2On, equals to the molecular mass, 60, put th...”
- 02:25 “Examples of molecules are nitrogen, oxygen, molecule, chloride, sodium, chloride, calcium, chloride. Sodium channels are naturally 5, and the likes of them. The number of atoms in the molecule of element is called atomic...”