What is the molar concentration of chloride in the resulting solution?


Posted on : 14-08-2013 | By : My Study Coach | In : Improve Your Concentration
1 Star2 Stars3 Stars4 Stars5 Stars (No Ratings Yet)
Loading ... Loading ...

If 50.0 mL of a 0.10 M solution of sodium chloride is mixed with 50.0 mL of 0.10 M magnesium chloride, what is the molar concentration of chloride in the resulting solution?

I know the answer is 0.15 M but I don’t know why. Can someone give me an explanation?

Related posts:

  1. HELP: What is the concentration of the original chloride solution?
  2. What was the molar concentration of the original phosphoric acid solution?
  3. How do I solve for the molar concentration?
  4. How to calculate the molar concentration of acetic acid in a sample of vinegar?
  5. How do you determine the Concentration of a Base at an Endpoint of a titration?

Share this :

  • Stumble upon
  • twitter

Comments (1)

Sodium chloride dissolves in water.
NaCl —-> Cl- + Na+
The concentration of Cl- is the same as NaCl, at 0.10M

Magnesium chloride also dissolves
MgCl2 ——-> 2Cl- + Mg2+
The concentration of Cl- is DOUBLE that of MgCl2, so it is 0.20M

The combined concentrations of the chloride ions is 0.30M, however you have doubled the volume (by adding two 50ml together), so the concentration is halved.
0.30M halved is 0.15M, as required :)

Post a comment

Powered by Yahoo! Answers

Powered by WP Robot

Remind Me Later

Sign Up for Your FREE Study Skills Video Course here