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SensFan
SensFan asked in Science & MathematicsChemistry · 1 decade ago

Molar Concentration for Copper (II) Sulfate Pentahydrate?

Okay I am doing this question for chemistry and I'm not sure if I'm doing it right. I have 5.3g of Copper (II) Sulfate Pentahydrate and I am mixing it will 100ml of water. I need to know the concentration of it. I read that it has a molar mass of 249.6, so I got that I have 0.02 moles of it. Then I got that its concentration is 0.2 mol/L after dividing 0.02 by 0.1 (100ml = 1L).

So am I doing this right because it just seems that I'm doing it wrong for some reason. If I am doing it wrong, what did I do wrong?

2 Answers

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  • Vextrus
    1 decade ago
    Favorite Answer

    Nope, that sounds completely right!

    Going by significant figures, though, your final answer would be .21M.

    Source(s): Chemistry minor
  • ?
    Lv 4
    5 years ago

    Copper Sulfate and Copper Sulfate Pentahydrate are two separate compounds. They have different molar massrs, densities, etc. Hydrates are actual chemical compounds with specific formulas, so the change is a chemical one since the formula of the compound changed. FYI: Copper Sulfate also forms a Trihydrate and a Heptahydrate

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