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Chem: if u can do this u = genius

  1. Dec 1, 2003 #1
    Hi, im having a huge problem with chem. i do not know what the heck is going on so can i have some help.




    Drops of each chemical into test tubes
    ==================================================
    ===================
    ratios Ca:CO
    test tube1: 0:24
    test tube2: 1:5
    test tube3: 1:2
    test tube4: 1:1
    test tube5: 2:1
    test tube6: 5:1
    test tube7: 24:0
    ==================================================
    ===================

    Determining Chemical Formulas I
    11. Based on valence, what do you think is the correct chemical formula for calcium carbonate?
    CaCO3

    12. Do your experimental results for the chemical formula for calcium carbonate agree with your chemical formula in question #11?


    13. What is the name of the new solid formed in the reaction?
    Salt

    14. What is the name of the new liquid formed in the reaction?


    15. Write the name of each of the compounds below the chemical equation, which shows what reaction, took place:

    CaCl2 + Na2CO3 à 2 NaCl

    _____________ _________________ __________________


    _____________ _________________ __________________

    16. If the correct formula for calcium carbonate had been Ca2CO3, which test tube would have contained the greatest amount of precipitate?

    17. If the correct formula for calcium carbonate had been Ca(CO3)5, which test tube would have contained the greats amount of precipitate?

    18. If the correct formula for calcium carbonate had been Ca(CO3)2, which test tube would have contained the greats amount of precipitate?

    19. How could you experimentally determine the correct chemical formula for the new liquid formed?

    20. How were the rations of calcium and carbonate determined?


    Drops of each chemical into test tubes
    ==================================================
    ===================
    ratios: Cu:OH
    test tube1: O:24
    test tube2: 1:5
    test tube3: 1:2
    test tube4: 1:1
    test tube5: 2:1
    test tube6: 5:1
    test tube 7: 24:0
    ==================================================
    ===================

    Determining Chemical Formulas II
    1. List the elements and the number of atoms of each element in one molecule of copper sulfate?

    2. How many different elements are in one molecule of copper sulfate?


    3. How many total atoms are in one molecule of copper sulfate

    4. What is the symbol and valence for copper II?


    5. What is the formula and valence for sulfate?

    6. List the elements and the number of atoms of each element in one molecule of sodium hydroxide?


    7. How many different elements are in one molecule of sodium hydroxide?

    8. How many total atoms are in once molecule of sodium hydroxide?


    9. What is the symbol and valence for sodium?

    10. What is the formula and valence for hydroxide?


    11. Based in valence, what do you think is the correct chemical formula for copper hydroxide?

    12. Do your experimental results for the chemical formula for copper hydroxide agree with your chemical formula in question #11?


    13. What is the name of the new solid formed in the reaction?

    14. What is the name of the new liquid formed in the reaction?


    15. Write the name of each of the compounds below the chemical equation, which shows what reaction, took place:

    CuCO4 + 2 NaOH à Na2SO4

    _____________ _________________ __________________


    _____________ _________________ __________________

    16. If the correct formulae for calcium carbonate had been CuOH, which test tube would have contained the greats amount of precipitate?

    17. If the correct formulae for calcium carbonate had been Cu2OH, which test tube would have contained the greats amount of precipitate?


    18. If the correct formulae for calcium carbonate had been Cu(OH)5, which test tube would have contained the greats amount of precipitate?

    19. How could you experimentally determine the chemical formula for the new liquid formed?
     
  2. jcsd
  3. Dec 1, 2003 #2

    enigma

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Do you honestly want someone to fill out your lab report for you?

    This is a homework help forum,

    not a "Do my homework for me" forum
     
  4. Dec 2, 2003 #3
    here here enigma!!
     
  5. Dec 2, 2003 #4
    Oh I can do these problems in my sleep. I'm not going to though. It's not fair to the students who didn't procrastinate and not pay attention in class.
     
  6. Dec 2, 2003 #5
    Seriously gotzmlk

    You may have figured that we aren't going to help you here. I suggest reading your textbook, class notes, study guides and the like.

    As Chemicalsuperfreak said, he can do it in his sleep implying that they aren't that hard!!

    I suggest trying to do at least some of the work and then come back to the forum with REAL problems.
     
  7. Dec 2, 2003 #6

    ShawnD

    User Avatar
    Science Advisor

    I'd love to help you (refresh my own memory) but you're missing lots of information.

    11. CaCO3

    12. not enough information

    13. Putting "salt" will for sure get you a 0. The term salt is so generic that it's like saying the result is "organic" or "inorganic". The new solid formed is called "calcium carbonate".

    14. not enough information (what did you mix together in the first place?)

    15. calcium chloride + sodium carbonate = sodium chloride + calcium carbonate

    16. test tube 5

    17. test tube 2

    18. test tube 3

    19. there is no liquid formed. to verify this, you could do something like a gas chromatograph or run it through a spectrometer.

    20. do you mean ratios?

    1. this question is not specific enough. there are 2 different ions for copper.

    2. Cu, S, O = 3

    3. since the copper ion is not specified, there is more than 1 answer.

    4. i couldn't even find the answer on google

    5. dunno

    6. sodium, oxygen, hydrogen; one of each

    7. 3

    8. 3

    9. dunno

    10. dunno

    11. copper 2 is more common so i'll say Cu(OH)2

    12. sure they do

    13. what are you mixing?

    14. again, what are you mixing?

    15. (just a guess) copper percarbonate + sodium hydroxide = sodium sulfate (conservation of mass???)




    That's all for now. superfreak, what are the answers to those valence onces? I never did get the hang of naming orbitals.
     
    Last edited: Dec 2, 2003
  8. Dec 3, 2003 #7
    as previously mentioned, please dont expect anyone in this world to do your homework for you, tedious, boring, and insulting to your genius as it may be. if you have a puzzleing problem that involves real thinking, then im sure one person who likes to be flattered as a genius would be glad to help.

    still, its ok, u spent as much time copying and pasting ur hw as we did replying. just watch out next time for what you're asking.
     
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