Search results for “hydrogène”

Q 12 The standard potential

With the help of the standard hydrogen half-cell, the potentials of all other half-cells can be determined. The standard hydrogen half-cell represents the defined 0-point. Therefore, these measured potentials are referred to as standard potentials. Original: "Wolfgang Dukorn" Original: German. All

09 What is hydrochloric acid

Hydrogen chloride gas (HCl) is discharged into water. This produces hydrochloric acid, which is also described with the formula HCl. But what is the difference between these two substances? Why do you have the identical formula? Original: "Wolfgang Dukorn" Original: German. All translations in thi

08 Lewis Formulas Without Practice

How are Lewis formulas (valence formulas) set up? The electron octet (duplet for hydrogen) and the total number of electrons must be observed! Original: "Wolfgang Dukorn" Original: German. All translations in this video have been done by the alugha AI.

08 Isotopes

Different isotopes of the elements can exist. These have a different mass number, but identical proton number. This is explained in the screencast and discussed again at the end using the example of hydrogen. Original: "Wolfgang Dukorn" Original: German. All translations in this video have been do

08 Decomposition of a pure substance

Pure substances can be analysed (broken down) by chemical reactions. In the process, elements are created. The important experiment of Hoffman's decomposition apparatus is presented and the proof for hydrogen and oxygen gas is shown. The results of the experiment are part of the attendance phase at