Chemistry

posted by .

How mush CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution?
g CaCl2 = (2.0L) *( 3.5 mol Cl-/1L) * (1mol CaCl2/ 2mol Cl-)
*( 110.98 g CaCl2/ 1 mol CaCl2) = 5.549 g CaCl2
i don't think i did any of this right

  • Chemistry -

    You made two errors. The rest is ok.
    You want grams CaCl2 and not Cl so omit Cl.
    That's mols needed = M x L = 2.00L x 3.5M = 7.00 mols.
    Then grams = mols x molar mass = 7.00 x 110.98 = about 777 g.
    How you obtained 5.55 grams I don't know. YOu must have punched the wrong numbers into the calculator.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used?
  2. chemistry

    If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity?
  3. chem

    158.5 mL of a AgNO3 solution at 5.0M was combined with a 3.5M CaCl2 solution. 110.5g of AgCl was recovered. Given that the CaCl2 is the limiting reagent, how many milliliters of the 3.5M CaCl2 solution was used?
  4. Chemistry

    158.5 mL of a AgNO3 solution at 5.0M was combined with a 3.5M CaCl2 solution. 110.5g of AgCl was recovered. Given that the CaCl2 is the limiting reagent, how many milliliters of the 3.5M CaCl2 solution was used?
  5. chem

    How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution?
  6. Chemistry

    1.Calculate the Theoretical and % Yields of the following equation: 2.What is the limiting and excess reactant?
  7. chemistry

    Calculate the solubility of Cacl2 in g/L based on the experiement. Given 650g of CaCl2 added to 1.0L and allowed to dissolve as much as possible. While the remaining solid CaCl2 is filtered out of the solution and found to have a mass …
  8. Chemistry

    If the molality of a CaCl2 solution is .100 mol/kg, and was made from 500.0 mL of water, how many grams of CaCl2 were needed to make the solution?
  9. Chemistry

    Dissolving solid CaCl2 H2O in a large volume of water is endothermic to the extent of 14.6 kj/mol. Also given: CaCl2(s)+6H2O(l)->CaCl2* 6H2O(s) delta H = -97.0 kj what is the heat of solution of anhydrous CaCl2 in a large volume …
  10. Chemistry

    Dissolving solid CaCl2 H2O in a large volume of water is endothermic to the extent of 14.6 kj/mol. Also given: CaCl2(s)+6H2O(l)->CaCl2* 6H2O(s) delta H = -97.0 kj what is the heat of solution of anhydrous CaCl2 in a large volume …

More Similar Questions