Crash Course
Precipitation Reactions: Crash Course Chemistry
A lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what's called a precipitation reaction. In this...
Bozeman Science
AP Biology Lab 12: Dissolved Oxygen
Mr. Andersen demonstrates the azide-winkler method of dissolved oxygen analysis.
Bozeman Science
Chemical Change
In this video Paul Andersen explains how chemical differs from physical change. In the laboratory macroscopic observations are used to infer changes at the particulate level. Evidence for chemical change include gas production, change in...
Curated Video
How do I know if a chemical reaction has occurred?!?
When trying to determine or prove if a chemical reaction has occurred, there are 5 indicators that scientist look for! The 5 indicators are the formation of a precipitate, the formation of a gas, the formation of water, a color change or...
Curated Video
Precipitate
A solid that forms in a liquid solution. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract concepts and key...
Curated Video
Precipitate Formation
We add potassium iodide and lead(II) nitrate to the opposite sides of a Petri dish filled with water to see how quickly they diffuse. When added to the water, the chemicals spread through the dish and when they meet they react to form...
Curated Video
Orange Tornado
We use mercury(II) chloride solution and potassium iodide to demonstrate a precipitation reaction. Saturated potassium iodide solution is placed on a magnetic stirrer and the speed is set so that a vortex is created. Mercury(II) chloride...
Curated Video
Silver Tree
We demonstrate a displacement reaction using silver nitrate and copper. A tree-shaped piece of copper is submerged in silver nitrate solution. The silver ions displace the copper and the tree slowly becomes coated with silver metal. At...
Wonderscape
Identifying Chemical Reactions: Observable Signs and Indicators
Explore the various changes in properties that occur as a result of chemical reactions. Learn how to recognize signs such as color change, emission of odor, production of gas, and formation of precipitates, with practical examples like...
Curated Video
GCSE Chemistry - Tests for Anions - Carbonate, Sulfate and Halide Ions #65
This video covers: - How to test for carbonates by reacting with an acid and then bubbling the gas through limewater - How to test for sulfate ion with dilute hydrochloric acid and barium chloride - How to test for halides like chloride,...
The Business Professor
Organizational Capacity for Change
What is Organizational Capacity for Change? Organizational capacity for change (OCC) is the overall capability of an organization, to prepare for, or to respond to, an increasingly volatile and changeable environment. Every person has a...
Professor Dave Explains
Classification of Sedimentary Rocks Part 3: Chemogenic Rocks
With siliciclastic and biogenic rocks covered, that leaves only chemogenic rocks to finish up with sedimentary rocks in general. These are rocks that precipitate from natural waters, usually due to evaporation. How does this occur, and...
Curated Video
Experiment on How Increasing Reactant Concentration Affects Reaction Rate
The video discusses a required practical activity from the chemistry specification, which is an experiment to investigate how increasing the concentration of a reactant affects the rate of the reaction by observing a precipitate. The...
Curated Video
Extracting DNA from Fruit: A School Laboratory Method
This video explains the process of extracting DNA from a fruit sample using a method that can be done in a school laboratory. The video outlines the steps involved in extracting DNA, such as creating a solution with salt and detergent to...
Catalyst University
Lecithinase Test | Theory & Results
In this video, we explore the theory and interpretation of results for the lecithinase test in microbiology.
Curated Video
Iron Tests: Flame Test, Sodium Hydroxide Test, and Tests for Negative Ions
This video is an educational presentation on common tests used to detect the presence of particular ions in compounds. The presenter demonstrates and explains various tests for positive and negative ions, including the flame test and...
FuseSchool
Testing For Positive Ions - part 2
Learn the basics about Testing for positive ions - part 2. Find out more in this video!
Professor Dave Explains
IIT/JEE Chemistry Practice #6: Stoichiometry/Precipitation Reactions
Practice REAL problems from actual past IIT/JEE exams with Professor Dave!
msvgo
Chemical Reactions Diazonium Salts
It explains chemical reactions of diazonium salts under two conditions.
Curated Video
Identifying Metal and Non-Metal Ions: Tests and Outcomes
This is a tutorial video on the required practical activities for identifying positive metal ions or negative non-metal ions in a solution in chemistry. The video explains the tests that need to be carried out and the expected outcomes...
FuseSchool
How To Test For Positive Ions - Part 2
Learn the basics about Testing for positive ions - part 2.
Professor Dave Explains
Practice Problem: Gravimetric Analysis
What the heck is gravimetric analysis? Well let's say we want to know how much of a substance is in some mixture. We could toss it in solution and cause it to form a precipitate with some other ion in solution. We can measure the mass of...
FuseSchool
Making Insoluble Salts
Learn the basics about how to make insoluble salts as a part of the overall acids and bases topic.