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
- 00:46 “sulfur, we use the phase letter S and some other examples like that. Combination of the phase, the next is, convolution of the phase letter, written in capital and one other letter from the name of the element, written i...”
- 00:00 “Good day everyone, my name is Adekunle, I am teaching you chemistry and the topic we have now is chemical symbols, formulae and equation. Chemical symbols, formulae and equation. What are chemical symbols? The symbol of...”
- 09:08 “for ordinary compounds, the summation is zero. 2 times 1, 2 plus 4. 4 times minus 2 is minus 8, equals to zero. Sofor take our collect-like terms, take the numbers to the other side minus 8 to the other side of the compo...”
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...”
- 09:58 “ratio, which is 1.82, 1.82, divided by 1.82, and what do you get after doing that? You are going to obtain 3-year ratio, 5-rissue-1. By this you get your empirical formula to C to be carbon-3, hydrogen-5, and nitrogen-1....”
- 12:18 “I don't know, they're 12 plus 2, give us 14, 14 plus 16, we give us 30. So you have 30 n equals to 60, divided both sides by the coefficient of n, which is, which is 30, you have to say, by the coefficient of n, which is...”
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.
- 07:49 “So, as you can see here, then be collected from this gas jar here, as you can see here. So, now, last quantity of carburetor oxide, all right? is produced by a copy convoxial of carbure compounds like Petru, like we have...”
- 29:44 “salt, don't forget that, all right? So, the reacts are insoluble, so the common methods for preparing them are very few, though, we need to understand this, because if you don't understand how these are, because we use t...”
- 30:33 “carbohydrates, of course, you put them from a base like carbonate, all right, but it's going to be insoluble, so then, now, I don't know, an example, we can also metast like zinc, or metallic oxide, example, we have a ma...”
Carbon and its Allotropes
The lesson covers the characteristics of carbon as an element and its various forms, known as allotropes. It explains the presence of carbon in nature, its compounds, and the two types of carbon oxides. The importance of carbon in living systems and its economic significance is also discussed.
- 20:20 “is used for the manufacture of pharmaceutical products and also as a solvent, okay? So for co-ta, co-ta is a mixture of more than 200 different substances, which can be separated by a fraction of distillation, so of cour...”
- 22:46 “will have a polyethnose acid or wood gas, actually, so then for the polyethnose acid, which is a liquid fraction of co-tax million etanote acids, all right? Which contain propanone, which contain metanone, and also some...”
- 19:32 “very cheap and the potter product that deep process actually produce a co-gas, ammonia caldicore, we have co-ta, and the solid, what's it called, a coke, so now the uses of this fraction, like I mentioned in the objectiv...”
Definition and Classification of Chemicals
This lesson defines chemicals and explains their various forms, including solids, liquids, and gases. It also classifies chemicals their hazardous nature and discusses safety measures when using them.
- 30:09 “watching. My name is Uche Ugo. Till the next class.”
- 16:14 “Now, mixtures are different from compounds and we can look at some reasons why they are different. Now, one of them is being that mixtures can easily be separated physically using mixtures such as filtration, freezing, d...”
- 09:39 “the 17th element. You see the 35th element, which is bromine, the M502, which is the iodine, and some other elements. The only two that are no arranged vertically are your lanterites and your actinites. Now, what are com...”
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
- 10:42 “of metas in order of their reactivities. The most reactive ones are on top of the series, followed by the modestly reactive and the least reactive down. So the most reactive ones will displace the less reactive ones from...”
- 00:00 “Hello everyone. I'm Mrs. Olabimpe Ayoko. I'm here to teach SS 3 chemistry and the topic is Metals and its compounds. So at the end of this lesson, everybody is expected to be able to define Metals with examples. The frie...”
- 08:13 “form Acalis. Water Acalis. Acalis are soluble hydroxide. So firstly for potassium. When potassium reacts with oxygen gas of the air that's thin. It gives you potassium OZI which is basic OZI. Basically because this react...”
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.
- 16:16 “This mix together, you get the salt and hydrogen gas, which becomes zinc chloride and hydrogen. When this is decomposed, you get zinc chloride and you also get hydrogen. And as a result, hydrogen is being stored in this...”
- 10:34 “more. Hydrogen is denoted with H. It's also a colorless, odorless, tasteless and flammable geyser substance that is in the simplest member of the family of chemical elements. So hydrogen is also odorless, it is tasteless...”
- 15:26 “is as a result of hydrogen. Adding the hydrochloric acid to zinc in a test tube funnel, hydrogen gas will be automatically collected using delivery tube with a downward displacement of water. hydrogen and testing for hyd...”