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Olympiad question #2 (Salts)

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Evaldas:
10 g iron plate was submerged into 200 g 8% copper(II) sulfate solution. After some time the plate was taken out and it got heavier by 0,8 g. Find out:
a) did all the copper(II) sulfate react?
Reaction:
CuSO4(aq) + Fe(s)  :rarrow: FeSO4(aq) + Cu(s)
m(CuSO4) = 16 g.
What's next?
n(Fe)=0.17857 mol; n(CuSO4)=0.1 mol?
All the copper sulfate reacted because there was excess of iron?

Borek:
How does mass of the plate change when 1 mol of iron reacts?

Evaldas:

--- Quote from: Borek on December 30, 2010, 02:58:31 PM ---How does mass of the plate change when 1 mol of iron reacts?

--- End quote ---
Gets replaced with 1 mol of copper?

Borek:
Mass of the plate gets replaced with 1 mole of copper?

Think again. This time start by reading the question I asked.

Evaldas:
Gets heavier because copper is heavier than iron?

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