December 25, 2024, 04:04:35 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Chemical In Excess Question  (Read 3596 times)

0 Members and 1 Guest are viewing this topic.

Offline saadaziz

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Chemical In Excess Question
« on: October 07, 2009, 11:47:55 AM »
25cm3 of a 0.20M NaCl solution were mixed with 25cm3 of a 0.15M Pb(NO3)2 solution.
a. Calculate the chemical that was in excess

i don't know what to do plz explain how you do this type of equation
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27886
  • Mole Snacks: +1816/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Chemical In Excess Question
« Reply #1 on: October 07, 2009, 12:09:43 PM »
What do you know about solubility of chlorides?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline saadaziz

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Chemical In Excess Question
« Reply #2 on: October 08, 2009, 11:05:04 AM »
all chlorides are soluble except pb hg and ag
Logged

Offline saadaziz

  • New Member
  • **
  • Posts: 6
  • Mole Snacks: +0/-0
Re: Chemical In Excess Question
« Reply #3 on: October 08, 2009, 12:07:57 PM »
sorry for the double post anyways i think i figured it out please tell me if am right

Pb2+(aq) + 2Cl- (aq) → PbCl2(S)
1              2 
2.5            5

2.5 as pb is only 1 mole so thus 2.5 and because CL is 2 moles we double the 2.5 to make 5 resulting in
Pb2+ being in excess
Right or wrong?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links