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.
- 13:00 “to the original constituents elements. What are mixtures? Mixtures are materials made up of two or more substances. Now, the difference between these compounds is that they are not chemically combined. Mixtures are physi...”
- 15:24 “Why the heterogeneous mixture? The particles are scattered. Example is the sand in water. The particles will be scattered. An example of mixture is your air. We say air is a mixture of gases. So, within the air you find...”
- 14:37 “the solute material which is placed on the liquid does not dissolve properly. Then we have colloid, which is the third mixture type. Now, for colloid, the materials which are two or more elements or constituent elements...”
Solution and Solubility
This lesson covers the concepts of solution, solute, and solvent. It defines solubility and explains different types of solutions, including saturated, unsaturated, and super saturated solutions. Factors affecting solubility and calculations related to solubility are also discussed.
- 03:08 “Then you have a gas dissolving the liquid, an example of that is a carbon dioxide in soda. Then a gas in solid, a very good example of that is a hydrochloric gas in palladium metal, all right? Then another type or catego...”
- 00:47 “Now, the students should be able to also define the following terms, saturated solution, unsaturated solution, and super saturated solution. And also be able to leave the factor that affects the solubility of the solute...”
- 04:41 “That is using most of the most of the countries, okay? So, now, solid in solid, an example of that is a sterile silver, all right? Then, now, how do we characterize a solution? Now, characteristics of solution. Now, it c...”
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
- 18:07 “When you mix it in cold water, you will notice that it will not dissolve well. And at that point, you are having a colloid. Colloid is a mixture in which one substance of microscopic dispersed insoluble particles are sus...”
- 13:51 “When you use your hand to touch the ion, the roast flick is that particle that comes out. So, it falls off the ion and exposes the new ion. Which can then also begin to roast. So, the ion has stages. So, once the first p...”
- 15:34 “However, this will result into a solution. When the chalk is placed into a water, you have a chalk solution. So, solvent, example of a solvent, is water. Now, in the picture, you see an example of solute. It is like a po...”
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.
- 18:41 “So how do we carry this carbonization process? Now basically, you find out that, like we mentioned before, for carbonization, it's a complex mixture, what's it called? Compounds composed of a million of carbon, all right...”
- 17:05 “now, is a purest form of code, to have various that will have a piece, you have, you know, other types, which you are going to see very soon. So this particular one contains about 94 to 95 percent of carbon. It has a ver...”
- 17:56 “So the pit has about 60 percent of carbon, then for others, which is actually brown, soft code, having about 67 percent, so of course, seven different, higher than the previous one, they're between minus or code, which a...”
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.
- 13:12 “Then, also, you have iodine five oxides be reduced to iodine, all right? So, as you can see, this equation here is showing that. Then, basically, uses of CO2 oxide. So, we have uses of CO2. So, CO2 oxide can be used as f...”
- 33:48 “so for example this is actually used by a manufacturer of glass, so you know, add detergents, okay, so then for this one is deployed in baking powder, or to discharge our carbon-folks, right, so as that helps to reduce t...”
- 06:15 “the carburetor oxide is passed through the delivery tube into this water, this is a water on pneumatic trough. So, pneumatic trough has a gas jar standing on it. So, that is the gas jar that has been evacuated, okay? So,...”