Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 12-16, 1897

Table of figures

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            <s xml:id="echoid-s4060" xml:space="preserve">
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            in die Flüſſigkeit. </s>
            <s xml:id="echoid-s4061" xml:space="preserve">Es wird ſich da ſehr bald ein eigentüm-
              <lb/>
            liches Schauſpiel zeigen.</s>
            <s xml:id="echoid-s4062" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4063" xml:space="preserve">Man wird dann bemerken, daß ſich an das Zinkſtäbchen
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            feine, graue Flöckchen anſetzen, als ob es einen Bart bekäme.
              <lb/>
            </s>
            <s xml:id="echoid-s4064" xml:space="preserve">Die Flöckchen vergrößern ſich bald und werden zweigartig, als
              <lb/>
            ob ſich in der Flüſſigkeit eine Art Trauerweide bildete. </s>
            <s xml:id="echoid-s4065" xml:space="preserve">Läßt
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            man den Prozeß ganz ungeſtört, ſo wird der Anblick unge-
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            mein intereſſant. </s>
            <s xml:id="echoid-s4066" xml:space="preserve">Bei guten, ſauberen Flüſſigkeiten nehmen die
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            Flöckchen das Anſehen von Silberblättchen an, welche an dem
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            Zinkſtreifen wachſen.</s>
            <s xml:id="echoid-s4067" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4068" xml:space="preserve">Was aber iſt hier vorgegangen?</s>
            <s xml:id="echoid-s4069" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4070" xml:space="preserve">In der Höllenſtein-Löſung war eine chemiſche Verbindung
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            von Silber und Salpeterſäure. </s>
            <s xml:id="echoid-s4071" xml:space="preserve">Nun aber hat die Salpeter-
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            ſäure eine viel größere Neigung, ſich mit Zink zu verbinden,
              <lb/>
            als mit Silber. </s>
            <s xml:id="echoid-s4072" xml:space="preserve">Nachdem man nun den Zinkſtreifen in die
              <lb/>
            Flüſſigkeit hineingeſetzt hat, verließ die Salpeterſäure das Silber
              <lb/>
            und verband ſich mit dem Zink.</s>
            <s xml:id="echoid-s4073" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4074" xml:space="preserve">All dieſe kleinen Experimente ſind unterhaltend und für
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            den denkenden Anfänger auch ſehr lehrreich. </s>
            <s xml:id="echoid-s4075" xml:space="preserve">Sie leiten zum
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            Verſtändnis vieler anderer chemiſcher Prozeſſe an, die für den
              <lb/>
            Anfänger nicht ſo leicht herzuſtellen ſind. </s>
            <s xml:id="echoid-s4076" xml:space="preserve">Sie zeigen, wie ſich
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            im chemiſchen Prozeß die Stoffe verändern, wenn ſie neue Ver-
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            bindungen eingehen, und wie ſie oft einander aus beſtehender
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            Verbindung verdrängen und zu neuen Geſtaltungen gelangen,
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            die man ohne Vorkenntnis der Naturprozeſſe nur blind an-
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            ſtaunen kann, ohne ſie zu begreifen.</s>
            <s xml:id="echoid-s4077" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4078" xml:space="preserve">Wer an ſolchen kleinen Experimenten Vergnügen findet,
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            dem wird es durch Beſchäftigung damit auch viel leichter
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            werden, ſich in wiſſenſchaftlichen Werten weiter zurecht zu finden.</s>
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