Posted by shanta on Tuesday, July 15, 2008 at 8:26pm.
Remember the definitions.
Molarity = # mols/L.
and # mols = g/molar mass.
How many moles CaCl2 do you have in 11.1 g CaCl2. That will be 11.1 g CaCl2/molar mass CaCl2.
Then #mols = M x L.
You have M and you have mols, calculate L.
The procedure suggested by DrBob 222 will give the correct answer to the question. However, the wording of the question itself could be improved. It might be:
"Calculate the total volume of solution (water + CaCl2) when a 0.0250 M CaCl2 solution is prepared by dissolving 1.11 g of CaCl2 in a small volume of water and diluting to the calculated volume.".
The amount of water added cannot be calculated with complete precision since the volume of the solution includes both, water and calcium chloride.
GK is correct; the problem could have been worded more correctly. I assumed you were asking for the solution. Also, I note that I made an error in typing. It isn't 11.1 g CaCl2 but 1.11 g CaCl2.
Related Questions
chemistry - Calculate the solubility of Cacl2 in g/L based on the experiement. ...
chemistry - If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-...
Chemistry/maths - Using the following stock solutions: NaCl, 100mmol KCl, ...
Chemistry - how many grams of CaCl2 would be required to be added to water to ...
Chemistry - If you were to prepare a 1.00 molal solution of CaCl2 beginning with...
chem - How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare ...
Chem!! - Consider the dissolution of CaCl2: CaCl2(s) -----------> Ca2+(aq...
chemistry - how do you calculate the molaarity of a water solution of CaCl2, ...
Chemistry - The ΔH per mole of CaCl2 is -81.0 kJ. Calculate the final ...
chem - How many grams of CaCl2 would be required to be added to water to prepare...
For Further Reading
