Neco Model Questions Vol1 2022 Chemistry Question 45
Practice objective / multiple choice question 45 from the 2022 Neco Model Questions Vol1 Chemistry examination.
A 0.500 g piece of an unknown metal M reacts with excess dilute \(\mathrm{HCl}\) according to \(\mathrm{M + 2HCl \rightarrow MCl_2 + H_2}\). The volume of hydrogen gas collected at 25 °C and 1.00 atm is 0.225 L. (i) Identify the metal M from the possible choices Zn, Fe, Mg, Al. (ii) In a galvanic cell constructed with a Fe electrode immersed in 0.100 M \(\mathrm{FeSO_4}\) solution and a Cu electrode immersed in 0.100 M \(\mathrm{CuSO_4}\) solution, the measured EMF at 25 °C is 0.78 V. Using the standard reduction potential \(E^{\circ}(\mathrm{Cu^{2+}/Cu}) = +0.34\;\text{V}\), calculate the standard electrode potential \(E^{\circ}(\mathrm{Fe^{2+}/Fe})\).
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This is Neco Model Questions Vol1 2022 Chemistry Question 45. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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