By Heike Kahlert, Fritz Scholz

ISBN-10: 364237901X

ISBN-13: 9783642379017

ISBN-10: 3642379028

ISBN-13: 9783642379024

Understanding acid-base equilibria made effortless for college students in chemistry, biochemistry, biology, environmental and earth sciences. fixing chemical difficulties, be it in schooling or in genuine lifestyles, usually calls for the knowledge of the acid-base equilibria in the back of them. in response to a long time of training adventure, Heike Kahlert and Fritz Scholz current a strong instrument to satisfy such demanding situations. they supply an easy consultant to the basics and purposes of acid-base diagrams, keeping off advanced arithmetic. This textbook is richly illustrated and has complete colour all through. It bargains studying gains equivalent to boxed effects and a suite of formulae.

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**Extra resources for Acid-Base Diagrams**

**Sample text**

In the range pKa1 < pH < pKa2 ; the slope is +2. Here, H3 BÀ is dominating. The line of B4À has a slope of +4 for pH < pKa1 where H4 B is dominating. However, the concentrations of B4À are so small in that range that they are outside the range of the diagram. , the range where H3 BÀ dominates, the slope is +3, and for pKa2 < pH < pKa3 the slope is +2 ( H2 B2À is dominating). 30 3 Constructing pH-logci Diagrams Fig. 26 Plotting the coordination system with the H3 Oþ and OHÀ lines of water, and marking the coordinates, here for an example of an acid with log ci ¼ log C H4 B ¼ À1, pH ¼ pKa1 ¼ 2, pH ¼ pKa2 ¼ 4, pH ¼ pKa3 ¼ 7 and pH ¼ pKa4 ¼ 12 Fig.

Normally, neglecting a summand is permitted when it contributes less than 1 % to the sum. This means that the smaller summand can be neglected when it is two orders of magnitude smaller than the other on the logci-scale of the pH-logci diagram. (continued) 36 4 The Application of pH-logci Diagrams for. . When in this book equations of the form x % y are used to derive simplified equations, it would be strictly considered necessary to write in all the follow-up equations the symbol “%”. However, since the thus-derived equations are always denoted as simplified equations (approximations), this is not done, and the equality symbol (¼) is used.

1 Monobasic Acids and Their Corresponding Bases 45 Fig. , when the line of HB is situated to the left of the H3 Oþ line (cf. Fig. 40), the pH of the solution must still be basic. The relationship equation (72) is still a good simplification, and the desired simplified equation follows as given here. Fig. 75) 46 4 The Application of pH-logci Diagrams for. . Simplified equation for a weak base in low concentration: cH3 Oþ sﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃﬃ K2w ¼ Kw þ Kb C BÀ (90) For very low concentrations of the base, Eq.

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Categories: Geochemistry