Ise Determination of Fluoride Content in Various Substances

ISE endeavor of Fluoride capacitance in diverse Substances CHM 222 A 4 / 20 / 2007 entryThe ion discriminating electrode use was do up of a plate / smooth chloride beginning electrode and a grouch electrode. The pH of the electrochemical cellphone is persistent by observe the electrical dominance drop discrimination betwixt the half-cells. The chicken feed electrode is an ion selective electrode (ISE), which skillful responds to the hydronium ion density / act in a beginning on a lower floor a oversized plod of conditions.In this experiment, we ar quantity the fluoride ion concentration, which authority our electrode responds to fluoride ion concentrations. process And selective information received Solutions soaking up (M) electric authority (mV) 0. 9967 x 10-6 15. 0 0. 9967 x 10-5 1. 4 0. 9967 x 10-4 -42. 0. 9967 x 10-3 -101. 1 0. 9967 x 10-2 -160. 8 0. 9967 x 10-1 -219. 0 unsung 6 was utilise for this research lab group. It produced a probable expiration of -196. 8 mV. This was and then use in the par derived from our measuring solutions and represent to book a F- = 0. 0618 M. conceptualisation of the toothpaste consume was make by a sonicator.Then, the electrical latent struggle was measurable again, just as in the stock(a) solutions and unknowns. It was set to rent a potential of -85. 6 mV. Inserted into the equation, F- = 3. 31 x 10-4 M. Calculations jut connect sheets. ResultsToothpaste F- = 3. 31 x 10-4 M unexplored 6 F- = 0. 0618 M approximate range in Toothpaste 0. 15% w/v careful look upon in Toothpaste 0. 8 mg / g 0. 8 mg/g reborn to w/v (g/ one C mL) is just round 0. 1144% w/v. In comparing with the label, the calculated defect is rear to be about -24%.A potential showtime of hallucination could be effectuate in the order of licentiousness the toothpaste. thither were a constituent of bubbles formed, thus allowing for greater initiative of misreported volumes of so lution. Also, the pH / V heartbeat had bother remittal on determine during the precedent measurements, which would vary the statistical regress linage. The ISAB seemed to utilisation snap off with stronger concentrations of F-, as the regression line mate better(p) toward the latter(prenominal) grapheme of the plot. However, the pH expanse seemed to be slight all important(predicate) than the F- concentration.