December 10, 2024, 07:13:17 AM
Forum Rules: Read This Before Posting


Topic: Need Help w/ Chemistry Lab Question!!  (Read 4249 times)

0 Members and 1 Guest are viewing this topic.

Offline Lyriana

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
  • Gender: Female
Need Help w/ Chemistry Lab Question!!
« on: September 02, 2007, 05:29:38 PM »
On one of my chemistry lab session, we need to do experiment about oxygen.

2 KClO3 (sol) -> 2KCl (sol) + 3 O2 (g)

We need to use this formula and do experiment to collect the oxygen using the displacement of water. We need 2 8 oz bottles of oxygen.

1. What does the collection of oxygen by displacement of water indicate about the solubility of O2 in water?

2. Add about 10 mL of water to the oxygen-filled bottles and lower a glowing splint into the bottle. Allow the combustion to continue for several seconds. Remove the splint, cover the bottle and swirl to mix the water & gas.

> I don't know how the answer #1, I know that the oxygen have more solubility in cold water b/c hot water decrease the dissolved oxygen concentration.

> #2, does it talking about C + O2 = CO2  ??


Please help me on this if anyone knows the answers because my lab it's the coming Friday! I have try to found answer on my own, but i really can't understand it.

I am really appreciated for the *delete me*

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27884
  • Mole Snacks: +1815/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Need Help w/ Chemistry Lab Question!!
« Reply #1 on: September 02, 2007, 06:26:44 PM »
Will you collect anything over the liquid, if the gas was easily soluble in that liquid?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Lyriana

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
  • Gender: Female
Re: Need Help w/ Chemistry Lab Question!!
« Reply #2 on: September 02, 2007, 07:07:56 PM »


I don't think we will collect anything over the liquid, but we do need to prepare to collect oxygen by displacement of water.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27884
  • Mole Snacks: +1815/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Need Help w/ Chemistry Lab Question!!
« Reply #3 on: September 03, 2007, 02:29:37 AM »
I don't think we will collect anything over the liquid

You have just answered your first question.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links