southport, Local Online News Community, Forums, Chats, For Sale, Classified, Offers, Film Reviews, Events, Motors Sale, Property For Sale Rent, Jobs, Hotels, Taxi, Restaurants, Pubs, Clubs, Pictures, Sports, Charities, Lost Found
Results 1 to 11 of 11
  1. #1
    Join Date
    Jun 2001
    Location
    Q Near Tarleton
    Posts
    23,818
    Likes / Dislikes

    What does this mean please?

    Br2(g) + 2KI(aq) → 2KBr(aq) + I2(s)



    Call or text roving-eye with your news 07530 315 478 or email timj@qnews.co.uk





  2. Check Todays Deals on Ebay.co.uk      Check Todays Deals On Amazon.co.uk
  3. #2
    Join Date
    Apr 2009
    Posts
    834
    Likes / Dislikes
    It's a chemical equation. Parts in brackets are the states of the matter ie, gas, aq-liquid etc. Left of arrow are the reactant that make up the products on the right. Will need to look up the chemicals. Why? I've seen that equation somewhere this week but my brains not awake yet.
    Volunteers needed now

    Southport And Formby Special Athletes
    Registered charity no. 1037697

    www.southportspecialathletes.org.uk

  4. #3
    Join Date
    May 2009
    Posts
    414
    Likes / Dislikes
    Bromine + Potassium Iodide = Potassium Bromide + Iodine
    g = gas
    aq = aqueous solution
    s = solid

  5. #4
    Join Date
    Apr 2009
    Posts
    834
    Likes / Dislikes
    I should have said it's a balanced chemical equation- there are the same amount of each element on each side of the equation.
    Volunteers needed now

    Southport And Formby Special Athletes
    Registered charity no. 1037697

    www.southportspecialathletes.org.uk

  6. #5
    Join Date
    May 2009
    Posts
    414
    Likes / Dislikes
    Bromine and Iodine are halogens and the equation is an example of a displacement reaction where the more reactive bromine displaces the iodine in the potassium iodide.

  7. #6
    Join Date
    Apr 2009
    Posts
    834
    Likes / Dislikes
    What lourqhino says, Lol, can you do my homework too please? Salt, dissulfude and tother bridges refuse to stick in my brain
    Volunteers needed now

    Southport And Formby Special Athletes
    Registered charity no. 1037697

    www.southportspecialathletes.org.uk

  8. #7
    Join Date
    Jun 2001
    Location
    Q Near Tarleton
    Posts
    23,818
    Likes / Dislikes
    step daughter is made up with answers so far cheers guys



    Call or text roving-eye with your news 07530 315 478 or email timj@qnews.co.uk

  9. #8
    Join Date
    Sep 2011
    Location
    'Manchester Hills'
    Posts
    15,742
    Likes / Dislikes
    The Redox reaction.

  10. #9
    Join Date
    Feb 2018
    Posts
    14,314
    Likes / Dislikes
    Quote Originally Posted by roving-eye View Post
    Br2(g) + 2KI(aq) → 2KBr(aq) + I2(s)
    This is a net ionic equation or a single replacement/displacement reaction (replaces Br with Iodine) between Bromine gas and Potassium Iodide in aqueous or liquid form. The symbols in brackets are state symbols indicating solid, liquid or gas.

    As others have said it is a redox equation which means reduction-oxidation as one substance is being reduced the other is being oxidised so:

    Br2 has an overall ionic charge of zero as it is a compound in neutral state, but the Br in KBr has been reduced and has gained an electron:

    K+ and Br-

    and now has an ionic charge of -1, as K+ has an overall charge of +1.

    Iodine in KI - is K+ and I- having an ionic charge of -1, this is changed to a charge of zero as I2 meaning it has been oxidised and has lost an electron.

    OIL RIG - oxidation is loss, reduction is gain of an electron.

    With redox equations you have two half equations that combine into a final equation. It is important that:

    The atoms on both sides add up and
    The charges balance on both sides so:

    Br half equation:

    Br2(g) + 2e- -> 2Br-

    I half equation:

    2I- -> I2 + 2e-

    Combined:

    Br2 + 2I- + 2K+-> 2Br- + I2 +K+ (notice without K+ atoms and charges still balance on both sides, K+ is a spectator ion)

    or

    Br2(g) + 2KI(aq) = 2KBr(aq) + I2(s)

    With state symbols you can also see that the experiment would be performed by bubbling the Bromine gas through the KI and you would be left with an iodine precipitate which would usually be purple. Iodine sublimes so as soon as it is taken out of solution, it turns into a gas.

    The equation is also an equilibrium equation meaning that the products are moving back and forth with the reactants, not simply -> we can use an = symbol.

    It also concerns the halogen atoms, a more reactive halogen atom can replace a less active halogen atom from its salt in water. Fluorine is more reactive than Chlorine and so on:

    F > Cl > Br > I so KBr can be replaced to KF in the same way, but not the other way around.

    I can go on but I think this answers your question, hope it helped :-)

  11. #10
    Join Date
    Jun 2015
    Posts
    3,774
    Likes / Dislikes
    It's an equation for the lubricant used on the Meniscus Fluffle Valve perfected by the Chinese Underwater Cavalry.

  12. #11
    Join Date
    Feb 2018
    Posts
    14,314
    Likes / Dislikes
    Quote Originally Posted by Little Londoner View Post
    It's an equation for the lubricant used on the Meniscus Fluffle Valve perfected by the Chinese Underwater Cavalry.
    Yes, very aptly explained - so everyone can be clear on that now. I bet you were an A grade student.

Custom Search


Search Qlocal (powered by google)
You are in: UK / Southport / North West
Find any Town in the UK, or Use UK map
Local Google MAP for Southport

User Control Panel

Not a Member? Sign Up!

Login or Register


Privacy & Cookie Policy



   Check Todays Deals On Amazon.co.uk
   Check Todays Deals on Ebay.co.uk

Also website at southportnews.co.uk

Southport Music & Piano Academy


Qlocal Supports Woodlands Animal Sanctuary

Woodlands Animal Sanctuary Charity

Booking.com

Firewood suppliers in southport
Replacement Stove Glass in southport
Supporting Local Business
Supporting Local Business
Be Seen - Advertise on Qlocal






UK, Local Online News Community, Forums, Chats, For Sale, Classified, Offers, Vouchers, Events, Motors Sale, Property For Sale Rent, Jobs, Hotels, Taxi, Restaurants, Pubs, Clubs, Pictures, Sports, Charities, Lost Found
southportsouthport News


Supporting Local Business
45a Sussex Road, Southport, PR9 0SR
Manufacturers of quality blinds and curtains including vertical, venetian, roller, pleated and roman. We are specialists in Conservatory blinds and motorisation. We also offer a full free measuring and fitting service.
WEBSITE     TEL: 01704 548247
Supporting Local Business
127 Wennington Road, SOUTHPORT, PR9 7AH
Our team of Veterinary Surgeons, trainee and qualified Veterinary Nurses and Receptionists aim to provide the highest possible standard of a personal, caring and friendly service.
WEBSITE     TEL: 01704 214460

Supporting Local Business
106 - 114 Shakespeare Street, Southport, PR8 5AJ
Big brands, big deals, 250 machines displayed, tractors, chainsaws, shredders, cultivators, aerators, vacs, trimmers, robot mowers, authorised warranty, most makes, est. 66 years
WEBSITE     TEL: 01704 535369
Supporting Local Business
Hesfords DIY & Gardening, Moorgate, Lancashire, L39 4RU
Hesfords has been a family concern since it was founded in 1903 by Charles Martin on Market Row. Originally specialising in engineering the company moved to its current location in 1978.
WEBSITE     TEL: 01695 572727


Stats: Qlocal over 500,000 page views a month (google analytics)