Curated Video
Introduction to Chemical Bonding
The basic ways elements combine to create compounds, fundamental to life as we know it. Chemistry - Atoms And Bonding - Learning Points. There are 92 naturally occurring elements. They fall into two categories: metals and non-metals....
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Carbohydrate
Molecules such as sugar and starch, which form an important energy source for living organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Hydroxide
Refers to the hydroxide ion, which is a negative ion consisting of an oxygen atom covalently bonded to a hydrogen atom. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Changing properties
What chemical and physical changes are at play in cake baking. Material processes - Changing materials - More chemical reactions Learning Points Chemical changes are usually irreversible. Physical changes are usually reversible. Chemical...
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Biphenyls & Optical Isomerism: When Planes Matter
Biphenyls are compounds consisting of two benzene rings connected by a single bond. In certain biphenyls, bulky substituents on the ortho positions of the rings can prevent free rotation around the bond, locking the rings in different...
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Allenes and Optical Activity: A Surprising Twist!
Allenes are compounds with a unique structure characterized by two adjacent double bonds (C=C=C). Despite having no traditional chiral centers, certain substituted allenes can exhibit chirality and optical activity due to their rigid,...
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Lactic Acid: A Case Study in Chirality
Lactic acid (2-hydroxypropanoic acid) is a classic example of a chiral molecule. It contains a chiral center at the second carbon atom, bonded to a hydroxyl group (-OH), a hydrogen atom, a carboxyl group (-COOH), and a methyl group...
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Symmetry and Optical Activity: Do Your Molecules Have It?
Symmetry and optical activity are intricately linked in organic molecules. A molecule is optically active if it can rotate the plane of polarized light. Optical activity arises from the molecule’s lack of symmetry—specifically, its...
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Conditions for Optical Activity: When Molecules Twist Light
For a molecule to exhibit optical activity, it must be chiral, meaning it has no internal plane of symmetry. Additionally, the solution or compound should not contain equal amounts of enantiomers (racemic mixture), as these cancel out...
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Specific Rotation: Measuring Optical Activity
Specific rotation is a standardized measure of how much a chiral compound rotates plane-polarized light. It's dependent on the substance’s concentration, the path length of the light, and the temperature, providing key insights into a...
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Optical Activity: When Light Meets Molecules
Optical activity refers to the ability of chiral compounds to rotate the plane of polarized light. Compounds that rotate light clockwise are termed dextrorotatory (+), while those that rotate it counterclockwise are levorotatory (−). The...
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Functional Isomerism & Metamerism: Discovering Molecular Twins
Functional isomerism occurs when compounds with the same molecular formula have different functional groups. For instance, ethanol (an alcohol) and dimethyl ether (an ether) share the formula 𝐶2𝐻6𝑂C2H6O but differ in their functional...
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Inductive Effect and Dipole Moment: Molecular Attraction Revealed
The inductive effect can also influence a molecule’s dipole moment, which measures the separation of charges within a molecule. Electron-withdrawing groups create a stronger dipole by pulling electron density away from less...
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Chemical Equations and Reactions: The Chemical Reactions
By the end of this learning object, the student will be able to: Summarize the important points of chemical equations and reactions.28728
Wonderscape
Origins of the Alamo: From Mission to Fortress
Uncover the early history of the Alamo, originally established as the Mission San Antonio de Valero in the 1700s by Spanish settlers in Texas. This video traces its transformation from a religious mission aimed at converting Native...
Healthcare Triage
How Do Drugs Get Invented?
With support from the National Institute for Health Care Management, we’re spending the next three episodes talking about how drugs get approved in the United States. In this first episode, we discuss the drug approval process from the...
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Name That Sentence Part
Mr. Griot explains how to find subjects and predicates in sentences.
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Single Replacement Chemical Reactions Explained
Learn all about single replacement chemical reactions. We'll break down the process and give examples to help you understand this important topic. Perfect for studying for your chemistry test or just brushing up on your knowledge.
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How to Predict the Products of Double Replacement Reactions
Double replacement chemical reactions, also known as precipitation reactions, are reactions where 2 elements are replaced. But you have to make sure that you replace the correct elements! In this video, we show you not only how to...
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Decomposition Chemical Reactions Explained
Decomposition, or combination, chemical reactions are an important reaction in chemistry and one that students sometimes struggle with. In this video, we simplify decomposition reactions so that students are able to not only identify...
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Decomposing Dividends
Decomposing Dividends teaches how to find whole number quotients with and without remainders for division problems with two-digit divisors and two- to four-digit dividends by decomposing the dividend.
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Deadly Snail's Venom Holds Promise for Powerful Pain Relief
The Great Barrier Reef is not only a natural wonder, but also home to a deadly marine snail that could hold the key to powerful new pain relieving drugs. Melbourne University researchers have discovered a compound in the venom of the...
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Materials and Technology in Formula One: The Key to Performance and Safety
This video highlights the use of advanced materials in a BMW Williams F1 car, emphasizing the importance of safety and performance. It showcases the use of carbon fiber, kevlar, titanium, and other materials in different components of...
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GCSE Chemistry - Electrolysis Part 3 - Aqueous Solutions #42
In this video we cover: - How the electrolysis of soluble compounds works - The rules to find out which ions are discharge at each electrode - Electrolysis of aqueous copper sulfate - Electrolysis of aqueous sodium chloride This video is...