1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Intro To Chemistry (Need Help)

  1. Sep 24, 2007 #1
    hi everyone

    I'm having problem with these 3 questions that i have to answer for my lab and i was wondering if any of u guys could help me out on these....

    any help would be appreciated...

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    1. so there are the equations and what the question is asking is to write the complete chemical equations and the state of each compound ( The equations should be balanced....)

    *charge

    MgCl2 + NaOH ---> Products (balanced)
    FeCl3 + NaOH
    BaCl2 + Na2SO4
    CaCl2 + AgNO3
    Pb(NO3)2 + Kl
    Na2CO3 + HCL
    NH4Cl + NaOH

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


    2. Q: Biosphere II was created in 1991 to test the idea that scientists could build a sealed, self-sustaining ecosystem. The carbon dioxide levels in Biosphere II were lower than scientists had predicted. Scientists discovered that the carbon dioxide was reacting with calcium hydroxide, a basic compound in the concrete.

    a) Write two balanced questions to show the reactions. Then classify the reactions,. Hint: In the first reaction, carbon dioxide reacts with water in the concrete to form hydrogen carbonate. Hydrogen carbonate, an acid, reacts with calcium hydroxide, a base.

    b) Why do you think scientists failed to predicts that this would happen?

    c) Suggest ways that scientists could have combatted the problem.



    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    3. Using Balanced Chemical Equation Represent: ( sulfur dioxide reacts with oxygen to form sulfur trioxide, which in turn reacts with liquid water to form sulfuric acid)

    a) the formation of the sulfur trioxide in an engine.
    b) the reactions of sulfur trioxide in out atmosphere.
     
  2. jcsd
  3. Sep 25, 2007 #2

    symbolipoint

    User Avatar
    Homework Helper
    Education Advisor
    Gold Member

    Your question set from number 1:
    Look for results that will produce either precipitates, or a weaker base. The reactants listed in each line are all soluble by themselves.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Intro To Chemistry (Need Help)
  1. Chemistry help needed! (Replies: 1)

  2. Need Help - Chemistry (Replies: 5)

Loading...