June 18, 2024, 09:24:41 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: HELP with Reactions In Aqueous Solution  (Read 4195 times)

0 Members and 1 Guest are viewing this topic.

Offline anjaan_101

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
HELP with Reactions In Aqueous Solution
« on: September 27, 2007, 05:23:44 AM »
Somebody Please Help Me With these Question. Its Urgent!

1) If a solution has a Ca(OCL)2 concentration of 3.56gm per 100ml of solution, what is the molarity of [OCL]-1 ?

The Equation for this is - Ca2+ + 2OCL-1 > Ca(OCl)2

The answers i got were - 0.249, 0.346, 0.692 and 0.00968. But all of them are wrong.


2) Citric acid (C6H8O7 has a molar mass of 192.12gm/mol) is a triprotic acid. How many grams of citric acid are contained in a 25.0ml sample that requires 38.8ml of 1.06M NaOH for neutralization to occur? Give the formula of the calcium salt of this compound.

I got the answer for the first part of the question. But I dont understand what is a calcium salt of a compund. Please Help.
« Last Edit: September 27, 2007, 07:48:17 AM by anjaan_101 »
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27702
  • Mole Snacks: +1804/-411
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: HELP with Reactions In Aqueous Solution
« Reply #1 on: September 27, 2007, 05:27:12 AM »
Please read forum rules.

Always start with balanced reaction equation.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7978
  • Mole Snacks: +555/-93
  • Gender: Male
Re: HELP with Reactions In Aqueous Solution
« Reply #2 on: September 27, 2007, 09:18:28 AM »
For 1 - you got correct molarity of Ca(OCl)2 - 0.249 M. What is molarity of OCl- ?
Hint For 2 - Phoshoric acid is also triprotic one. Could you write down a formula for calcium phosphate?
Logged
AWK

Offline anjaan_101

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-1
Re: HELP with Reactions In Aqueous Solution
« Reply #3 on: September 27, 2007, 02:08:12 PM »
Thanx for the help with 1. Found the right M.
For 2 the formula for Calcium Phosphate is Ca3(PO4)2
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7978
  • Mole Snacks: +555/-93
  • Gender: Male
Re: HELP with Reactions In Aqueous Solution
« Reply #4 on: September 28, 2007, 02:16:05 AM »
and calcium citrate ?
Logged
AWK
Pages: [1]   Go Up
« previous next »
Sponsored Links