Chemistry

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

asked by Sydney
  1. 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.

    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity? 0.44 M CaCl2 0.70 M CaCl2 2.3 M CaCl2 3.0 M CaCl2
  2. Chemistry

    How many grams of CaCl2 are needed to make 100ml of a 15% solution in water if only the dihydrated (CaCl2 •2H20) salt is available?
  3. Chemistry

    How many grams of CaCl2 are needed to make 100ml of a 15% solution in water if only the dihydrated (CaCl2⋅2 H2O) salt is available?
  4. 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? Step by step would be appreciated!
  5. chemistry

    how many grams of cacl2 are needed to prepare 6.00L of a 0.400M CaCl2 solution
  6. Chemistry

    A CaCl2 solution is given to increase blood levels of calcium. If a patient receives 5.0 mL of a 5.0 % (m/v) CaCl2 solution, how many grams of CaCl2 were given?
  7. 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?
  8. chemistry

    What volume of 15.00 M CaCl2 solutions is needed to make 3.000 gallons of 5.500 M CaCl2 solution ?
  9. Chemistry

    Based on the following equation: 2AgNO3 + CaCl2 > 2AgCl + Ca(NO3) When 50 g AgNO3 are combined with 1.45M CaCl2 solution, what volume of the 1.45M CaCl2 solution would be needed to precipitate all of the silver as AgCl?
  10. chemistry

    1. How many grams of calcium chloride (CaCl2) are there in 600.0 mL of an aqueous solution that has a concentration of 0.450 M CaCl2? 2. The conjugate base of HS- is: 3. What mass of calcium chloride, CaCl2, is needed to prepare

More Similar Questions