Question: pls clear demonstration and clarification. no ambiguous values without clarification. thank you. Consider a Zn/Hg amalgam, forming a non-ideal solution where Zn is a non-volatile

pls clear demonstration and clarification.
no ambiguous values without clarification.
thank you.
 pls clear demonstration and clarification. no ambiguous values without clarification. thank

Consider a Zn/Hg amalgam, forming a non-ideal solution where Zn is a non-volatile solute, and Hg is a solvent with very low vapour pressure. As a result, it is not practical to determine the activity coefficients Zn for Zn using measurements of vapour pressure. Instead, it is more convenient to determine the activity coefficients for Zn by measuring the electromotive forces in batteries with amalgam electrodes (a topic that we'll discuss later in the course). Use the Gibbs-Duhem, and the Zn activity coefficients below, to estimate the activity coefficient Hg for the solvent (Hg) in an amalgam with molar fraction xZn=0.035

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