April 27, 2024, 12:46:33 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: 1 [2] 3   Go Down

Topic: Order the one has highest boiling point to lowest  (Read 5727 times)

0 Members and 1 Guest are viewing this topic.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27664
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Order the one has highest boiling point to lowest
« Reply #15 on: November 16, 2019, 04:34:44 AM »
AWK asks where did you got the problem from - was it in a book, or asked by a teacher? found in some internet source?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #16 on: November 16, 2019, 05:29:53 AM »
I got the question from pdf in internet
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Order the one has highest boiling point to lowest
« Reply #17 on: November 16, 2019, 05:43:10 AM »
Can you give this link?
Logged
AWK

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #18 on: November 16, 2019, 09:31:05 AM »
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Order the one has highest boiling point to lowest
« Reply #19 on: November 16, 2019, 10:41:22 AM »
You changed question and numbers - but this is not fatal.
There is an evident error in the problem (7 fields for answers instead of 4) also - non-fatal.
And there is the error in the answer (I suppose this is the printing error) - but fatal.
Logged
AWK

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #20 on: November 16, 2019, 10:57:59 AM »
Yes. What is the evident error in the problem 7? Is it only the answer that wrong?
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Order the one has highest boiling point to lowest
« Reply #21 on: November 16, 2019, 11:00:17 AM »
The answer should be 2
Logged
AWK

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #22 on: November 16, 2019, 11:06:14 AM »
I see. Thanks awk
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27664
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Order the one has highest boiling point to lowest
« Reply #23 on: November 16, 2019, 11:45:42 AM »
Actually that's not the only problem with these questions. Problem 6 has no answer, as none of the underlined elements gets oxidized. The only equation that seems to be suggesting oxidation is 3, but it is not a redox, just a simple metathesis.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27664
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Order the one has highest boiling point to lowest
« Reply #24 on: November 16, 2019, 11:49:28 AM »
Quote from: AWK on November 16, 2019, 10:41:22 AM
There is an evident error in the problem (7 fields for answers instead of 4) also - non-fatal.

No, that's OK, the table is for 7 problems all being part of the set I (which starts on a previous page). And the problem no 7 needs a single answer, as it asks only "which has the highest".
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #25 on: November 16, 2019, 12:17:44 PM »
Yes borek. The 1-7 table is for all questions of set I. And for no 6 in set I, yes i kinda find it weird at start, but i guess i had to choose 3.
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Order the one has highest boiling point to lowest
« Reply #26 on: November 16, 2019, 12:49:42 PM »
There is no good answer to problem 6 from Part I. Reaction 3 is not a redox reaction as Borek pointed out.
Moreover, at least organic problems VI and VII are partially questionable.
Logged
AWK

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #27 on: November 16, 2019, 12:58:43 PM »
Why its questionable?
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7979
  • Mole Snacks: +555/-93
  • Gender: Male
Re: Order the one has highest boiling point to lowest
« Reply #28 on: November 16, 2019, 01:49:12 PM »
Part VI. Compound D should be salicylic acid, compound E - phenol
Part VII. Reaction 1 - when not stated reaction undergoes at room temperature - this reaction needs over 300°C
Reaction 3 - ethanol at 160°C without catalyst = ethanol vapors.
With catalyst - ethene (ethylene)
« Last Edit: November 16, 2019, 02:06:35 PM by AWK »
Logged
AWK

Offline Fish200398

  • Full Member
  • ****
  • Posts: 148
  • Mole Snacks: +0/-3
Re: Order the one has highest boiling point to lowest
« Reply #29 on: November 16, 2019, 02:56:23 PM »
Ok. Thanks awk. Guess in other questions (other year) might be mistakes too
Logged
Pages: 1 [2] 3   Go Up
« previous next »
Sponsored Links