3 years ago

In the chemical reaction: zn(s) + cu2+(aq) → zn2+(aq) + cu(s),

1 answer:

7 0

Zn⁰(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu⁰(s),

Zn⁰(s) ------> Zn²⁺(aq) + 2e⁻
As we can see Zn(s) lost 2 electrons and became Zn²⁺ ion.
So, Zn was oxidized.
Correct answer is 1) Zn(s).

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The mass of the surround here is the mass of the coffee-cup calorimeter and this contain the mixture ( water and the NaOH ) so the mass of the surrounding is

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