Der pH-Wert ist laut Definition der negative dekadische Logarithmus des Zahlenwertes der Oxonium-Ionen-Konzentration. Der pOH-Wert ist laut Definition der negative dekadische Logarithmus des Zahlenwertes der Hydroxid-Ionen-Konzentration. pH und pOH-Wert ergeben in der Summe immer 14. pH = -lg c(H3O+)

Rafael Müller

Säure und Basen

Wichtiges Wissen über Säure und Basen. Cover: Icons8

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Nach Brönsted gehen bei einer Säure-Base-Reaktion immer Protonen (H+) von einer Säure- zu einem Base-Molekül über.

Rafael Müller

Somit sind Säuren Protonendonatoren und Basen Protonenakzeptoren.

Rafael Müller

Gibt eine Säure ihr Proton ab, entsteht aus ihr die korrespondierende Base, nimmt eine Base ein Proton auf, entsteht aus ihr die korrespondierende Säure.

Rafael Müller

Moleküle die sowohl als Säure als auch als Base reagieren können, nennt man Ampholyte. Zu ihnen zählen z.B. Wasser und Ammoniak.

Rafael Müller

Reagiert eine Säure mit einer Base so neutralisieren sich die beiden Moleküle. Es entsteht ein Salz und MEIST auch Wasser.

Rafael Müller

Die Neutralisation verläuft exotherm, die freiwerdende Energie nennt man neutralisations Energie.

Rafael Müller

Säure + Base --> Salz + Wasser + Energie

Rafael Müller

Um messen zu können, ob eine Lösung sauer, alkalisch oder neutral reagiert, berechnet man den pH-Wert.

Rafael Müller

Im neutralen Milieu ist die Konzentration der Oxonium-Ionen (H3O+) genauso groß wie die der Hydroxid-Ionen (OH-). In sauren Lösungen ist die Option Oxonium-Ionen-Konzentration größer, in alkalischen kleiner als die der Hydroxid-Ionen-Konzentration.

Rafael Müller

Auf einer Skala von 0 bis 14 bedeutet ein pH-Wert von 7 neutral, ein pH-Wert kleiner 7 sauer und größer 7 alkalisch.

Rafael Müller

Salzsäure ist eine wässrige Lösung von HCl; Natronlauge bzw. Kalilauge sind wässrige Lösungen von NaOH bzw. KOH; Kalkwasser bzw. Barytwasser sind wässrige Lösungen von Ca(OH)2 bzw. Na(OH)2.

Rafael Müller

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I have to have a daily, vibrant relationship with Jesus in order to survive that process toward healing.

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Maturity begins the day you take responsibility for your own feelings.

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March to the beat of your own drummer.

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I want to wait to have sex until I'm married.

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Fassbender is fearless; he's a fearless actor.

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First and deadliest of all is a founder's unwavering belief that he or she understands who the customers will be, what they need, and how to sell it to them.

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Firefighter required to perform all the necessary task in order to control an emergency situation.

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I'm consistently blown away by 'Mad Men.' Having spent so much time in the writers' room, I'm cursed in that anytime I watch something, I'm always calculating what the writers are up to.

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