Dismiss Notice



Register Today It's free! This box will disappear once registered!

help me with a timed online quiz for chem. (math problem)

Discussion in 'Exploring everything under the sun!!' started by expo5.0, September 25, 2002.

^^Searches ExplorerForum.com^^
  1. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    i need to calculate the H+ in a solution that has a pH of 4.67. anyways i can get to the point where i have the following equation 9.33=-log[oh-], but how do i solve that??? i'm stupid i guess, but i can't figure out how to do it?

    similarly i need to calculate OH- in a 4.90 pOH solution and i get it to 9.1=-log[H+], and run into the same problem.

    also in another question i need to solve 9.1=-log[H+], i know i'm being an idiot here and i should be able to solve this in a second, but i'm just staring at my calculator and shaking my head.

    btw- the online quiz is timed, so please hurry
     
  2. Support EF

    Join the Elite Explorers for $20

    Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.


  3. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    alright, i ran out of time without getting those answers (i still got a grade of 83 percent which is good enough to get into my lab tomorrow) but i can stilll go back and put those answers in so that i can improve my grade if i figure them out. thanks -Drew
     
  4. section525

    section525 sextion525 Elite Explorer Moderator Emeritus

    Joined:
    February 11, 2001
    Messages:
    14,800
    Likes Received:
    19
    Trophy Points:
    58
    City, State:
    Red Bluff, Ca
    Year, Model & Trim Level:
    1975 Ford Bronco 4x4
    I looked, but it was over my head. If you ever come across any questions where they want you to connect dots or draw pictures, just give me a holla! :D
     
  5. espnfreak

    espnfreak Well-Known Member

    Joined:
    February 5, 2001
    Messages:
    3,797
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Elgin, IL
    Year, Model & Trim Level:
    '99 Maxima SE-L *5spd
    -(10^9.33) = OH- i believe..
     
  6. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    oh, that makes some sense. i'll try that later thanks man
     
  7. espnfreak

    espnfreak Well-Known Member

    Joined:
    February 5, 2001
    Messages:
    3,797
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Elgin, IL
    Year, Model & Trim Level:
    '99 Maxima SE-L *5spd
    ok cool, i remember doing that last year. sad thing is I took 2 years of chem in hs and im taking begineers chem here and i bombed the first test..lol but yeah you any good at chem? if i have problems then ill know who to contact. Right now we're doing acid base reactions and oxidation numbers...easy easy stuff, but i know when the test comes it will be a bitch. oh well gotta study harder i guess
     
  8. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    yeah, i'm almost done with the chemistry i need to be a biology major at the u of m. i can probably help with most things. but i have a reputation for high assing stupid rules like this one and needing help with easy things.
     
  9. espnfreak

    espnfreak Well-Known Member

    Joined:
    February 5, 2001
    Messages:
    3,797
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Elgin, IL
    Year, Model & Trim Level:
    '99 Maxima SE-L *5spd
    no way ill be a chemistry major or any science major, i can't stand it, and on top of that, those guys make the hardest tests so u fail.
     
  10. espnfreak

    espnfreak Well-Known Member

    Joined:
    February 5, 2001
    Messages:
    3,797
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Elgin, IL
    Year, Model & Trim Level:
    '99 Maxima SE-L *5spd
    i got a math problem...lol 6x^2-6x-6=0, i need to solve for x. i gots the answer on the calc, but i need to know how to do it
     
  11. jjue

    jjue Elite Explorer<br>sXc Member

    Joined:
    April 16, 2000
    Messages:
    655
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Brandon, MS
    Year, Model & Trim Level:
    '07 Nissan Titan CC LE
    where ax^2+bx+c=0

    x=(-b+-sqrt(b^2-4ac))/(2a)

    That is supposed to be the quadratic equation, but someone should correct me if I'm wrong.
     
  12. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    hey, alec i bet you know how to do these. how do i solve 9.33=-log[H+]
     
  13. coolchris

    coolchris Elite Explorer

    Joined:
    October 7, 2001
    Messages:
    1,083
    Likes Received:
    0
    Trophy Points:
    46
    Year, Model & Trim Level:
    1996 xlt
    i did all that shit last year you take antilog of 9.33 and that gives you h+
     
  14. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    and... where is the antilog key on my calculator? or is there another way to do it?
     
  15. espnfreak

    espnfreak Well-Known Member

    Joined:
    February 5, 2001
    Messages:
    3,797
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Elgin, IL
    Year, Model & Trim Level:
    '99 Maxima SE-L *5spd
    10^x is antilog, log is log10
     
  16. expo5.0

    expo5.0 Elite Explorer

    Joined:
    October 18, 2001
    Messages:
    7,271
    Likes Received:
    0
    Trophy Points:
    0
    City, State:
    Red Wing, MN
    Year, Model & Trim Level:
    1996 xlt
    yep, i figured it out about three a.m.. i don't know how i forgot how these worked.
     






We Support Our Troops!