Concentration of solution

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What mass of solute is needed to prepare 400 mL of 0.850 M from ? thx

[Mao]

hint: you want moles of

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thanks mao...
What's actually happening in the question though? Is the splitting up to form a precipitate? Also is there another liquid or is it just in liquid state?

[Collin Li]

The hydrated copper sulfate complex ion is a coordination compound.

A coordination compound involves a central cation (transition metal, as far as I know), which then links to a number of ligands. There are multiple arrangements, but common arrangements include the tetrahedral, square planar and octahedral arrangement.

is in an octahedral arrangement. There are 6 ligands there: 5 aqua ligands and the sulfate ion ligand.

These coordination compounds (complex ions) were a mystery to chemists before they understood their structure. Read about them here.

[Mao]

what coblin tried to say was

treat the complex compound as a molecule in its own right and don't worry about it much more for the sake of VCE Chemistry

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Lol ok thanks guys