(b) The concentration of vanadium (V) in sea water can be determined by adsorptive stripping voltammetry after forming a

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B The Concentration Of Vanadium V In Sea Water Can Be Determined By Adsorptive Stripping Voltammetry After Forming A 1 (49.51 KiB) Viewed 23 times

(b) The concentration of vanadium (V) in sea water can be determined by adsorptive stripping voltammetry after forming a complex with catechol. The catechol-V (V) complex is deposited on a hanging mercury drop electrode at a potential of -0.1 V versus a Ag/AgCl reference electrode. A cathodic potential scan gives a stripping peak that is proportional to the concentration of V (V). The following standard additions were used to analyze a sample of seawater (Table 1). Table 1. Current for different concentration of V (V) in sea water. [V(V)] added (M) 2.0x10 8 4.0×10-8 8.0×10-8 1.2x10-7 1.8x10-7 2.8x10-7 peak current (uA) 24 33 52 69 97 140 Determine the molar concentration of V (V) in the sample of sea water, assuming that the standard additions result in a negligible change in the sample's volume.