Hydrogen

In this video lesson, Mr. Scullion demonstrates a reacting mass problem involving ammonia and hydrogen. Try the problem out on your own prior to finding out the solution.

In this video lesson, Mr. Scullion demonstrates a reacting mass problem with volume of hydrogen gas. Try the problem out on your own prior to finding out the solution.

In this video I discuss the trend in boiling points and solubilities of the carboxylic acids. These are explained in terms of hydrogen bonds and van der Waals forces.

This video reviews the three main types of intermolecular force by way of explaining the boiling points of aldehydes and ketones and their solubility in water. It looks at van der Waals forces, dipole-dipole forces and hydrogen bonding.

In this video lesson, Mr. Scullion demonstrates a reacting mass problem involving hydrogen sulphide. Try the problem out on your own prior to finding out the solution.

In this video lesson, Mr. Scullion demonstrates a reacting mass problem. Try the problem out on your own prior to finding out the solution.

In chemistry, pH is a measure of the activity of the (solvated) hydrogen ion. p[H], which measures the hydrogen ion concentration is closely related to, and is often written as, pH. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement.

This Chemistry lesson is titled Dont Make this Mistake with Hydrogen Bonding! and will give a detailed explanation of the topic.

In chemistry, pH is a measure of the activity of the (solvated) hydrogen ion. p[H], which measures the hydrogen ion concentration is closely related to, and is often written as, pH. Pure water has a pH very close to 7 at 25°C. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode. Measurement of pH for aqueous solutions can be done with a glass electrode and a pH meter, or using indicators.