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química general aplicada manual de laboratorio - biblioteca upibi ...

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DESARROLLO EXPERIMENTAL<br />

a) Material:<br />

1 gradilla 1 termómetro<br />

1 pinza para tubo <strong>de</strong> ensaye 8 pipetas graduadas <strong>de</strong> 5 mL<br />

12 tubos <strong>de</strong> ensaye<br />

pH<br />

1 Mechero<br />

1 cápsula <strong>de</strong> porcelana<br />

1 palillo <strong>de</strong> ma<strong>de</strong>ra<br />

1 espátula<br />

Papel tornasol o tiras indicadoras <strong>de</strong><br />

b) Reactivos:<br />

Nitrato <strong>de</strong> plomo (0.5 g / 50 mL) Trozos <strong>de</strong> alambre <strong>de</strong> cobre<br />

Yoduro <strong>de</strong> potasio (1 g / 100 mL) Trozos <strong>de</strong> cinta <strong>de</strong> magnesio<br />

Ácido sulfúrico 3 M<br />

Cloruro <strong>de</strong> bario 0.1 M<br />

Ácido clorhídrico 1.0 M<br />

Nitrato <strong>de</strong> cobre 1.0 M<br />

Nitrato <strong>de</strong> zinc 1.0 M<br />

Ácido nítrico 1.0 M<br />

Clorato <strong>de</strong> potasio 0.5 g<br />

Zinc en polvo<br />

c) Secuencia experimental:<br />

Experimento I.<br />

Ensayo A:<br />

-En un tubo <strong>de</strong> ensaye colocar 1 mL <strong>de</strong> una solución <strong>de</strong> nitrato <strong>de</strong> plomo<br />

(Pb (NO3)2).<br />

44

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