December 07, 2022, 06:13:38 AM
Forum Rules: Read This Before Posting


Topic: Calculatin Ion Concentration  (Read 4500 times)

0 Members and 1 Guest are viewing this topic.

Offline iced

  • Regular Member
  • ***
  • Posts: 13
  • Mole Snacks: +0/-0
Calculatin Ion Concentration
« on: September 14, 2008, 01:17:56 PM »
Hey guys I am having a small problem that I can not seem to get right.

Question: The chief ions in seawater are Na+, Mg2+, and Cl-. Seawater is approx. 0.438 M NaCl and 0.0512 M MgCl2. What us the mass Cl- (that is the total [Cl-] in seawater?

I know the procedure to calculate M, but when I write the balanced equation I keep getting 3 mols of Cl-.

NaCl + MgCl2 --h20 > Na+ + Mg2+ + 3Cl-

If someone could write the entire solution step by step that would be great.

Thanks in advance.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27241
  • Mole Snacks: +1771/-408
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Calculatin Ion Concentration
« Reply #1 on: September 14, 2008, 01:40:52 PM »
No such thing as balanced equation for this question, there is no reaction between NaCl and MgCl2, and they are just in a mixture.

What is concentration of Cl- from NaCl? From MgCl2? Add.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Offline iced

  • Regular Member
  • ***
  • Posts: 13
  • Mole Snacks: +0/-0
Re: Calculatin Ion Concentration
« Reply #2 on: September 14, 2008, 01:47:08 PM »
Ah, no wonder I could not get the correct answer. Thank you!

Sponsored Links