La celebración de año nuevo está a solo días de llevarse a cabo, es un momento para festejar en familia, disfrutar de una rica cena y en medianoche apreciar el espectáculo de fuegos artificiales (que si bien no es de mi agrado los fuegos artificiales que hacen ruido) ya en ciertos países han implementado el uso de pirotecnia sin ruido. Como la química lo explica todo, hoy en química en casa conocerás de donde surgen los fuegos artificiales y el por qué de los diferentes colores que presenta.
Los colores de los fuegos artificiales son originados por la presencia de sales, ocasionadas por la combustión de la pólvora; y cuya reacción genera una liberación de energía la cual es visible, gracias al espectro electromagnético, por longitudes de onda específicas que llegan a nuestros ojos dando un color singular a cada catión de la sal correspondiente. Dependiendo del catión que esté involucrado, la tonalidad será diferente.
Acá te mostramos los más utilizados en la elaboración de pirotecnia:
Sodio (Na): Proporciona tonalidades doradas y amarillas.
Cobre (Cu): En forma de carbonato de cobre, genera el color azul.
Bario (Ba): Genera el color verde.
Estroncio (Sr): El color rojo se lo debemos a las sales de estroncio.
Titanio (Ti): Produce los colores plateados y blancos.
Por su parte, se emplean otros elementos como:
Carbono (C): Se utiliza como combustible.
Magnesio (Mg): Da brillo y luminosidad.
Calcio (Ca): Se emplea para dar más intensidad a los colores.
Antimonio (Sb): Produce los halos de los brillos.
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