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Phase Diagram for Water. Water is a unique substance in many ways. One of these special properties is the fact that solid water (ice) is less dense than liquid water just above the freezing point. The phase diagram for water is shown in the figure below.
In this reaction, one water molecule acts as an acid and one water molecule acts as a base. Thus, this reaction actually can be designated as the \(K_a\) of water and as the \(K_b\) of water. It is most common, however, to designate this reaction and the associated law of mass action as the \(K_w\) of water:
17 Αυγ 2024 · A water molecule can act as an acid or a base even in a sample of pure water. About 6 in every 100 million (6 in 10 8) water molecules undergo the following reaction: H2O(ℓ) + H2O(ℓ) → H3O + (aq) + OH − (aq) This process is called the autoionization of water (Figure 13.2.1.1) and occurs in every sample of water, whether it is pure or ...
We can use the phase diagram to identify the state where water exists under specific temperature and pressure conditions. For example, water is ice at 50 kPa and – 10 o C. Water is unique compared to other substances.
Interactive 3D chemistry animations of reaction mechanisms and 3D models of chemical structures for students studying University courses and advanced school chemistry hosted by University of Liverpool.
Water is made up of two hydrogens and one oxygen atom, arranged in a tetrahedral shape. Oxygen is highly electronegative, which creates a partial negative charge on one end of the molecule, and a partial positive charge on the other.
Potassium reacts rapidly and intensely with water, forming a colourless basic potassium hydroxide solution and hydrogen gas, according to the following reaction mechanism: 2K (s) + 2H 2 O (l) -> 2KOH (aq) + H 2 (g)
