Answer:
Two-electron.
Explanation:
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In this case, since the half-reaction by which chlorine is reduced to aqueous chloride ion is:
We can see each chlorine undergo a decrease of electrons by 1, it means that, since there are two chlorine atoms undergoing an electron decrease, we write:
Which means this is a two-electron process.
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Answer:
56.44 %
Explanation:
The formula of copper(II) sulfate pentahydrate is .
In order to calculate the mass percentage of water in it, we may assume that we have 1 mol of copper(II) sulfate pentahydrate. In general, the mass percentage is a ratio between the mass of a component and the total mass of the compound expressed in percent:
Since we're taking 1 mole of a substance here, we may state that the mass percentage of water will be calculating using molar masses instead:
Notice that we take 5 molar masses of water, as 1 mole of copper(II) sulfate pentahydrate contains 5 moles of water molecules, then: