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Beaker of liquid undergoing chemical reaction
Beaker of liquid undergoing chemical reaction
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Diverse male scientists analyze liquid in test tubes
Young African American male scientist and his mid adult Hispanic male colleague compare liquid in test tubes. The African American man hands the Hispanic man a test tube and he places in a test tube rack. The Hispanic man is using a...
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Diverse chemists or chemistry students work on scientific experiment
Mid adult Hispanic scientist or chemistry student records chemistry experiment findings on a laptop while his lab partner or colleague conducts the experiment by dropping liquid from a beaker into a test tube. The men are wearing safety...
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Potassium metal reacting with water.
The reaction produces hydrogen gas and potassium hydroxide. The heat of the reaction ignites the hydrogen gas produced, which burns with a lilac flame. The indicator phenolphthalein has been added to the water, which turns pink due to...
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Lime water test for carbon dioxide. Carbon dioxide gas bubbling through lime water (calcium hydroxide solution), which turns milky as the gas reacts to form a precipitate of calcium carbonate
Lime water test for carbon dioxide. Carbon dioxide gas bubbling through lime water (calcium hydroxide solution), which turns milky as the gas reacts to form a precipitate of calcium carbonate
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Silver Nitrate Chemical test
Silver Nitrate test for the presence of chlorides in water.
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Hydrating anhydrous copper (II) sulphate (white) by dripping water.
The blue colour of copper (II) sulphate is due to the presence of so-called water of crystallisation in the crystal structure. Dripping water onto the anhydrous form rehydrates the compound, giving the blue colour
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Workers walk through fermentation room at Septima winery.
Workers walk through fermentation room at Septima winery.
Getty Images
Potassium metal reacting with water.
The reaction produces hydrogen gas and potassium hydroxide. The heat of the reaction ignites the hydrogen gas produced, which burns with a lilac flame. The indicator phenolphthalein has been added to the water, which turns pink due to...
Getty Images
Hydrating anhydrous copper (II) sulphate (white) by dripping water.
The blue colour of copper (II) sulphate is due to the presence of so-called water of crystallisation in the crystal structure. Dripping water onto the anhydrous form rehydrates the compound, giving the blue colour
AFP News Agency
CLEAN : Congolese star chef brings secrets of Africa to the dining table
Congolese chef Dieuveil Malonga has visited 38 of Africa's 54 countries, bringing back fermentation and other techniques, as well as ingredients to create Afro-fusion cuisine at his restaurant in Rwanda's capital (Footage by AFPTV via...
Sky News
Beckley Exhibition Coal Mine
CLEAN: Interior and exterior shots of Phillips-Sprague Mine, also known as the Beckley Exhibition Coal Mine on 28 October 2021 in Beckley, Raleigh County, West Virginia.
AFP News Agency
CLEAN : Russias sports officials justifying themselves says head of anti doping laboratory
The head of Russia's anti doping laboratory Yuri Ganus reacts after Russian Sports Minister Pavel Kolobkov insisted that data on Russian athletes test results that was sent to the World Anti Doping Agency (WADA) as part of attempts to...
TED-Ed
How to Speed Up Chemical Reactions (and Get a Date)
How are chemical reactions like dating? A collision must first occur! In this hilarious approach to speeding up chemical reactions, viewers find out that five changes can increase the rate of reaction: smaller space, increased number of...
TED-Ed
If Molecules Were People...
By watching this droll and delightful animation, physical scientists consider what happens when molecules collide. In this film, however, parodic people bump into each other, exchanging limbs in the process, just as molecules might trade...
Curated OER
Red Cabbage Chemistry
An acid/base indicator that's made of blended red cabbage and water is used to demonstrate the various reactions that an acid/base solution goes through when some carbon dioxide gas is added. The best way to add the carbon dioxide is to...
Steve Spangler Science
Acid Breath - Cool Science Experiment
An acid/base indicator that's made of blended red cabbage and water is used to demonstrate the various reactions that an acid/base solution goes through when some carbon dioxide gas is added. The best way to add the carbon dioxide is to...
Curated OER
How to Blow Up a Balloon With Baking Soda & Vinegar
A simple combination of baking soda and vinegar creates enough carbon dioxide to blow up a balloon! It's an awesome illustration of chemical reactions for upper elementary learners, or use it with slightly older scientists to introduce...
Curated OER
Stoichiometry
To understand the concept of stoichiometry, this class uses s'mores as an analogy. They compute the number of s'mores they can make based on the stoichiometric formula. Learners then apply this concept to how it is typically used in...
Curated OER
Ultimate Table Trick Challenge
There's a lot going on here: air pressure changes, inertia, and chemical reactions. All of this occurs in 60 seconds time! As an end of the year physical science assessment, consider showing this video clip and then having learners write...
Curated OER
Erupting Volcano - Sick Science! #070
Create your own volcano using this recipe for fun. Using yeast, hydrogen peroxide and water, your class can make their own volcanoes. This is an easy way to illustrate this natural phenomenon as well as chemical reactions.
Curated OER
Borax Crystal Star
Make your own crystals. Learners can use borax, water, food coloring, and a string to make a colorful crystal. This is a great way to explore chemical reactions, crystal formation, or evaporation.
Steve Spangler Science
Naked Egg - Sick Science! #031
It's amazing how much science can be taught with the use of eggs! Spangler gives a little "teaser" sample of some of the amazing demonstrations and experiments that can be done with them. In this one, he puts an egg in a glass of...