What is the difference between copper (II) sulfate trihydrate, copper (II) sulfate pentahydrate and anhydrous copper (II) sulfate?

Copper sulphate crystals refers to the blue pentahydrate . You want to make a 2ppm CuSO4 solution . This is 2mg CuSO4 dissolved in 1.0L of solution

What mass of CuSO4.5H2O must you use?

Molar mass = 159.6 g/mol (anhydrous) : 249.7 g/mol (pentahydrate)

Mass = 2mg * 249.7g/mol / 159.6g/mol = 3.12mg

It is inconvenient to weigh out 3.12mg CuSO4.5H2O

Instead - weigh out 0.312g and dissolve in water to volume 1.0L . This solution is 100X the desired concentration. Now take 10mL of this stock solution , and dilute to a final volume of 1.0L .

You now have 1.0L of 2ppm CuSO4 solution.

If you’re looking for how many grams of copper there are per gram of copper sulfate pentahydrate…

The formula for copper (II) sulfate pentahydrate is CuSO4 * 5H2O.

What we know from this is that for every mole of CuSO4 * 5H2O, we have 1 mole of copper. So to find out how many grams of copper we have for every mole of CuSO4 * 5H2O, we can just use the molar mass of copper (63.546 g/mol).

However, we want grams of copper for every gram of the CuSO4 * 5H2O. Every mole of CuSO4 * 5H2O weighs 249.681 grams, so we can find our final result of 0.25451 grams of copper for every gram of CuSO4 * 5H2O (which I got from 63.546/249.681).

No. If you look at the activity series, silver is below copper on the list, so silver will not displace copper in a compound.

Cu=64(MW)

Cu^+2 (n=2)

t=4*60 seconds

Using this formula, m= MW*I*t /'96500*n

m= 64*1,5*4*60 / 96500*2= 0,12 g of copper

Visually, some of the white copper sulphate will turn blue.

Chemically, the copper sulphate crystal would absorb the water molecules in a ratio of 5 water molecules per copper sulphate unit.

Spectroscopically, electron donation from the lone pairs on the water will modify the energies of the copper ion in such a way that the complement of blue color, that is orange, is absorbed in electronic transitions.

I hope this answers your question.

Explanation -
Zinc is more reactive than copper. So, here , on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. This is indicated by colour change from blue to colourless. CuSO4 solution has a blue colour while ZnSO4 solution is colourless.

Chemical equation -
Zn(s) + CuSO4(aq) -> Cu(s) + ZnSO4 (aq).

Type of reaction -

1. It's a displacement reaction.
2. It's a redox reaction. Oxidation number of Cu decreases from 2 to 0 so it's reduced. Oxidation number of Zn increases from 0 to 2 so it's oxidised.