Chemistry

posted by .

A mixture of CuSO4 and CuSO4·5 H2O has a mass of 1.235 g. After heating to drive off all the water, the mass is only 0.830 g. What is the mass percent of CuSO4·5 H2O in the mixture?

  • Chemistry -

    Mass of H2O expelled = 1.235-0.830=0.405 g

    RMM of 5H2O = 5*(2*1+16)=90

    RMM of crystalline CuSO4
    =63.55+32+4*16 + 90
    =249.55

    Therefore, by proportion, mass of crystalline CuSO4.5H2O
    =0.405*(249.55/90)
    =1.123g
    Mass percentage of CuSO4.5H2O
    =mass of CuSO4.5H2O / total mass
    =?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Does CuSO4•0H2O have a molar mass of 177.636?
  2. Chemistry

    Anhydrous CuSO4 can be used to dry liquids in which it is insoluble. The CuSO4 is converted to CuSO4.5H2O, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO4 needed to remove 12.4g H2O from a tankful …
  3. Chemistry

    Anhydrous CuSO4 can be used to dry liquids in which it is insoluble. The CuSO4 is converted to CuSO4 x 5H20, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO4 needed to remove 12.6 g H20 from a …
  4. chemistry

    A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed and found to have a mass of 160 grams. What is the formula for the hydrate?
  5. Chemistry

    the mass of the crucible is 19.73 g fill the crucible with CuSO4 which was 26.44 g Heat the crucible until the water is released it weighed 23.40 g So now, how many moles of water is removed?
  6. Chemistry

    Hi I need with with a prelab calculation for a Hydrate Crystal lab and I am so confused @_@ You don't really need to solve it if you don't want to, I just need an example on how to do these problems 1) Find the mass of the water that …
  7. chemistry

    @20*C solubility - 22g CuSO4 / 100g H2O @40*C solubility - 42g CuSO4 / 100g H2O which is saturated and unsaturated a. @20*C is 6g CuSO4 / 25g H2O b. @20*C is 30g CuSO4 / 150g H2O c. @40*C is 99g CuSO4 / 250g H2O please show work thanks
  8. chemistry

    If a 8.6195 g of a mixture which contains (20.0 % of CuSO4.XH2O and 80.0 % of sand) was heated in a crucible then cooled in the desiccator the mass obtained was 7.9976 g. a- Find X the number of water of hydration in the Hydrate (CuSO4.XH2O) …
  9. Chem 11

    So I did a lab determining the chemical formula of a hydrate. I really just need somebody to check this over for me. We had to find the molecular formula of a hydrate of copper (2) sulphate, CuSO4 .xH2O. My observation table looks …
  10. Chemistry 11

    So I did a lab determining the chemical formula of a hydrate. We had to find the molecular formula of a hydrate of copper (2) sulphate, CuSO4 .xH2O. My observation table looks like this: Mass of clean, dry test tube: 21.6g Mass of …

More Similar Questions