posted by .

1.62 g of CoCl2 x (xH20) were heated. After heating only .88g of CoCl2 remained. What was the formula of the original hydrate?

  • Chemistry -

    CoCl2 = 0.88 g
    H2O = 1.62-0.88 = 0.74 g

    Convert to moles.
    moles CoCl2 = 0.88/molar mass
    moles H2O = 0.74/molar mass.

    Now find the ratio of moles H2O to one(1) mole CoCl2. The easy way to do that is to divide moles CoCl2 by itself, then divide the moles H2O by the same small number and round to a whole number.

  • Chemistry -


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chem

    how do you know if a solid can be a hydrat given the mass before and after heating?
  2. Chemistry

    After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate?
  3. chemistry

    1.30 mol each of CO} and Cl2 are introduced into an evacuated 1.80 L flask, and the following equilibrium is established at 668 K. CO + Cl2 +++> COCl2 kp = 22.5 Calculate partial pressure of COCl2. i get about 30.9. but its wrong. …
  4. Chemistry- helpp!

    The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis?
  5. Chemistry

    the initial pressure of phosgene gas (COCl2), was 1.31 atm. it was heated, and at equilibrium the pressure of CO was found to be .547 atm. what are the equilibrium pressures of Cl2 and COCl2?
  6. chemistry

    a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?
  7. chemistry

    A 2.50g sample of a hydrate of calcium nitrate was heated, and only 1.70g of the anhydrous salt remained. what is the formula of the hydrate?
  8. chemistry

    Cobalt(2) chloride is commonly obtained from chemical supply houses as a hydrate with the formula COCL2*6H2O an analysis showed that 25.0 g of this hydrate contains 11.3 g of water what is the percent water by weight in this hydrate?
  9. Chemistry

    Predict the effect of each of the following by mass of water in the hydrate and the chemical of the hydrate?
  10. Chemistry

    A hydrate of copper (II) sulfate with formula CuSO4.xH2O has a molar mass of 250.0 g/mol. 2.545 g of hydrate is heated and 63.85% of the residue is found after heating. a) Determine the value of x in the formula of the compound b) …

More Similar Questions