Artículo publicado en J. Chem. Educ.
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When reviewing a variety of textbooks, it may be observed that, generally, very little importance is given to units. In fact, equations are often derived without any reference to them. Consequently, when students try to apply such equations, they usually do not know which units to use, so finally they very likely mix a dimensionally inconsistent set of units. Furthermore, the problem with some...
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When blood pH is measured in healthy human subjects, it is found that in all cases it lies between 7.3 and 7.5. In fact, when the pH gets out from that range an important fisiological alteration takes place, which leads to various disease states. The reason for the pH to be so constant is due to the various blood buffer systems, formed by conjugate weak acid-base couples
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Para estudiar el equilibrio ácido-base conjugado en disolución acuosa tenemos que considerar tanto el equilibrio ácido-base como el equilibrio de disociación del agua. Sin embargo, una aproximación muy frecuente consiste en utilizar solo el equilibrio ácido-base, aunque desgraciadamente se obtienen resultados diferentes para el equilibrio escrito como disociación ácida o como hidrólisis básica....
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