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------------------------------------------------ Using a table for standard reduction potentials, calculate the minimum voltage needed to electrolyze potassium chloride into its elements ([tex]K(s)[/tex] and [tex]Cl_2(g)[/tex]).

A) 4.29 V
B) –4.29 V
C) 1.57 V
D) –1.57 V

The electrolysis of potassium chloride (KCl) involves two half-reactions. The reduction of potassium (K) ions to form solid potassium and the oxidation of chloride (Cl-) ions to form chlorine gas (Cl2). The reduction potential of potassium is -2.92 V and the oxidation potential of chloride is -1.36 V. In electrolysis, the minimum voltage required is the sum of the absolute values of the oxidation and reduction potentials.

So, you sum up -2.92 V (for K) and -1.36 V (for Cl), giving you 4.29 V. Therefore, the answer to your question: "Using a table for standard reduction potentials, calculate the minimum voltage needed to electrolyze potassium chloride into its elements (K(s) and Cl₂(g))" is A) 4.29 V.

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