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IB CHemistry HL 2022 May Paper 1 TZ2-Question 30


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Which EÖ value, in V, for the reaction Mn(s) + Zn2+(aq) → Mn2+(aq) + Zn(s) can be deduced

from the following equations?
Mn(s) + 2Ag+(aq) → Mn2+(aq) + 2Ag(s) EÖ = 1.98V

Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) EÖ = 1.10V

Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s) EÖ = 0.46V


why answer is 1.98-0.46-1.1=0.42V

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