Bozeman Science
AP Biology Lab 2: Enzyme Catalysis
Paul Andersen starts with a brief description of enzymes and substrates. He then explains how you can measure the rate of an enzyme mediated reaction. Catalase from yeast is used to break hydrogen peroxide down into water and oxygen. ...
TED Talks
TED: The era of personal DNA testing is here | Sebastian Kraves
From improving vaccines to modifying crops to solving crimes, DNA technology has transformed our world. Now, for the first time in history, anyone can experiment with DNA at home, in their kitchen, using a device smaller than a shoebox....
Bozeman Science
AP Biology Lab 4: Plant Pigments and Photosynthesis
Paul Andersen explains how pigments can be separated using chromatography. He shows how you can calculate the Rf value for each pigment. He then explains how you can measure the rate of photosynthesis using leaf chads and water...
TED Talks
Nathan Wolfe: The jungle search for viruses
Virus hunter Nathan Wolfe is outwitting the next pandemic by staying two steps ahead: discovering deadly new viruses where they first emerge -- passing from animals to humans among poor subsistence hunters in Africa -- before they claim...
Curated Video
Filtration and Evaporation
We use filtration and evaporation to separate out a mixture of water, sand and salt. The sand is removed using filtration, as it did not dissolve in the water. The remaining solution is heated until the water evaporates, leaving behind...
Curated Video
Chemical Filtration
We look at how chemical filtration can be used to remove contaminants from water. Potassium permanganate is used as the contaminant. First, we try to remove it using physical filtration, with filter paper and a funnel. This does not...
Curated Video
GCSE Chemistry - Filtration, Evaporation & Crystallisation #6
In this video we'll look at: - How filtration can be used to separate insoluble solids from a liquid - How evaporation can be used to separate a soluble solid from a solution - How crystallisation can be used to separate a soluble from a...
Curated Video
GCSE Chemistry - Paper Chromatography #63
In this video you'll learn: - What chromatography is used for - The process for setting up and carrying out paper chromatography - What the mobile and stationary phases are
Curated Video
GCSE Chemistry - Neutralisation Reactions #36
This video covers how acid react with different types of bases - metal oxides, metal hydroxides, and metal carbonates. It also covers the practical technique of how to make soluble salts from an insoluble base. This video is suitable...
Curated Video
GCSE Chemistry - Percentage Yield #33
This video covers: - The difference between 'actual yield' and 'theoretical yield' - Why the actual yield may be less than the theoretical yield - How to calculate the percentage yield Exam board specific info: AQA - Separate/triple...
Curated Video
Preparation of Copper Sulfate: A Chemistry Practical Experiment
This video explains the process for preparing soluble salts through the reaction of dilute acids with soluble metals, metal oxides, metal hydroxides, or metal carbonates. The specific example of preparing copper sulfate from copper oxide...
Curated Video
Preparing Copper Sulfate Crystals: A Step-by-Step Guide
The video is a lecture presentation on the process of preparing copper sulfate crystals. The presenter explains the reaction between copper oxide and sulfuric acid that produces copper sulfate and water, and the challenges of obtaining a...
Professor Dave Explains
Common Scientific Glassware and the Undergraduate Chemistry Laboratory
Before we dive into all kinds of fascinating chemistry laboratory techniques, we should familiarize ourselves with all the different equipment we will be using to perform these techniques. The chemistry lab is full of neat-looking...
Curated Video
Food Tests: Standard Tests for Starch, Reducing Sugars, Proteins, and Lipids in Different Foods
The video is a lecture presentation on food tests. It explains the four standard tests for starch, reducing sugars (such as glucose), proteins, and fats or lipids, and demonstrates how to carry out these tests on different foods. The...
Curated Video
Making Salts Experiments: Producing Dry Pure Samples of Copper Chloride in Two Different Ways
The video is a lecture presentation on the process of making salts through experiments. The presenter demonstrates different bases, copper carbonate and copper oxide, and hydrochloric acid. The presenter explains the theory behind the...
Curated Video
How to Make Insoluble Salts: State Symbols, Solubility Rules, and Preparation
The video is a chemistry lesson on making insoluble salts. The teacher explains the concept of state symbols and how they indicate if a salt is soluble or insoluble. The teacher also covers solubility rules and how they predict if a salt...
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Separation Techniques Part 5
Chemistry has real world applications! Don’t believe us? Watch this video and find out for yourself. It even helped the pirates evade the British Navy! This lesson will wrap up our exploration of separation techniques by looking at...
Professor Dave Explains
Gravity Filtration and Vacuum Filtration
The first laboratory technique that we will learn together is a very simple one, filtration. This is how we separate a mixture of liquids and solids. There are two common ways a chemist will perform filtration, those being gravity...
Catalyst University
The Renal Corpuscle, Glomerulus, and Blood Filtration
In this video, we will discuss: [1] the anatomy of the renal corpuscle [2] glomerular filtration [3] glomerular filtration rate (GFR) [4] what substances get filtered
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Gravimetric Analysis Part 1
Long Jane Silver landed a sweet cocoa deal with a local farmer, Senor Ortega. But when a supply ship barely survives a storm, the pirates and Ortega join forces to save the cocoa farm! This lesson will unearth the steps in gravimetric...
Curated Video
Chromatography Experiment: Investigating Inks or Pigments in Black Ink
The video discusses the process of chromatography and its application in investigating the inks or pigments in a sample of black ink. The experiment involves using filter paper as the stationary phase and water as the mobile phase. The...
Curated Video
Preparation of Insoluble Salts: Using Solubility Rules and Filtration.
The video provides a detailed explanation of how to prepare a pure dry sample of an insoluble salt, specifically lead sulfate. The speaker first explains the solubility rules that determine whether a salt is soluble or not. Then, he goes...
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Homogeneous and Heterogeneous Mixtures
Life is tough for thirsty pirates – the sea is filled with water that can’t be drunk! Thankfully, Blackbeard has figured out a trick. This lesson will compare heterogeneous and homogeneous mixtures. We’ll also look at solutions, which...