Paul Andersen details the first 7 of 13 labs in the AP Biology Curriculum. The following topics are all covered: Artificial Selection, Hardy-Weinberg Equilibrium, Comparing DNA using BLAST, Diffusion and Osmosis, Photosynthesis,...

In this video Paul Andersen explains how atoms are conserved in a chemical reaction. This can be seen in a chemical equation where the subscripts represent the atoms in the molecule and the coefficients represent the molecules. The...

Acids are widely considered to be the scariest chemical compounds of all, but bases can be just as powerful. Most powerful of all are a special class of pH scale-defying bases called superbases!

In this video Paul Andersen explains how stoichiometry can be used to quantify differences in chemical reactions. The coefficients in a balanced chemical equation express the mole proportions in that reaction. These values can be used...

In this video Paul Andersen explains how acid-base chemistry can be understood in terms of equilibrium. Water is present in all acid-base chemistry and is amphoteric in nature. The Ka and Kb values can be used to determine the strength...

Today's episode dives into the HOW of enthalpy. How we calculate it, and how we determine it experimentally...even if our determinations here at Crash Course Chemistry are somewhat shoddy.

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In this video we walkthrough 3 limiting reactant practice problems step by step and show you how to solve them!

How to make a balanced chemical equation using sodium hydroxide and hydrochloric acid!
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In this video, we're going to show you how to quickly and easily balance acid/base chemical equations. This is a skillset that is...

Group IV elements, including carbon, silicon, germanium, tin, and lead, have varying reactivity with water, acids, and bases due to their varying electronegativities and bond strengths. Carbon is generally unreactive, while silicon...

What is the difference between acids and bases? This is a commonly asked question in both chemistry and biology classes. In this video, we will go through the definition of acid and base, and why they are so important to us, and, uh,...

We put three different plants under different conditions to demonstrate that both light and carbon dioxide are needed for photosynthesis to occur. A leaf from each plant is taken and heated in ethanol to remove the pigment. These are...

We use potassium ferricyanide and luminol indicator to show how forensic scientists detect blood at crime scenes. The luminol indicator contains luminol, sodium hydroxide and hydrogen peroxide. When luminol comes into contact with the...

We use maggots to let us observe aerobic respiration. The maggots are placed over sodium hydroxide in a specimen tube. A bung and delivery tube are attached to the specimen tube that feed into a boiling tube of coloured water. In the...

We use coloured agar cubes to see how different shapes change the rate of diffusion. The cubes are made using sodium hydroxide and phenolphthalein indicator to give them a pink colour. When these are added to hydrochloric acid, the...

This video is covers what acids and bases are, what the pH scale is, how we measure pH with indicators and probes, and what neutralisation reactions are.

This videos covers how to use state symbols to show the physical state that substances are in, and also how to predict the state from melting and boiling point data.



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This video will explain the concept of a mole and how to calculate the molarity of a solution using concentration of solutions.

Learn the basics about solubility rules for insoluble salts, as part of the overall acids, bases and alkali topic.

In this video, the presenter discusses titration calculations, which are useful in determining the concentration of a solution by using a solution of known strength. The video explains the thought process and equations involved in...

Top cybersecurity executives examine new cyber and privacy regulations and how companies should be responding.

This video explains the concept of concentration of a solution and how it can be measured in grams per decimeter cubed or moles per decimeter cubes. It provides examples of calculations involving concentration and volume, as well as a...

It explains acids and bases in a laboratory. It explains reaction of acids and bases with metals, metal carbonates and metal hydrogen carbonates.

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...

This video is a lecture presentation on titrations. The presenter discusses the theory behind the experiment and then demonstrates how to carry out a titration to determine the volume of hydrochloric acid needed to neutralize a certain...