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Problem of the Week Archive

Collection of all our problem of the week threads.

650 Posts
57 Topics
Last post by bubblegumpi
in Re: Stoichiometry exerci...
on May 14, 2017, 12:45:44 PM
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Could you please advice some good study book on colloidal/surface chemistry? Hedgehog 1 248 Last post August 10, 2017, 07:26:56 PM
by Vidya
Not a problem of the week, but similar level of difficulty Borek 12 1153 Last post July 29, 2017, 12:39:29 AM
by Arkcon
Stoichiometry calculator Borek 2 14618 Last post January 06, 2015, 04:01:01 AM
by Borek
Finding the pH of an amphiprotic acid (HPO4-2) in .1 M solution. saratan 1 82 Last post Yesterday at 09:27:29 PM
by Borek
MOVED: IChemE Accreditation Borek 0 35 Last post Yesterday at 09:25:47 PM
by Borek
van der Waals forces question PicturesOfLilly 14 667 Last post August 15, 2017, 03:54:04 PM
by pyrophoric
Dilution Help hopenaroz 3 270 Last post August 14, 2017, 12:55:25 PM
by Arkcon
Basic salts MR 3 220 Last post August 11, 2017, 11:28:55 AM
by Borek
Al + NaOH --> Al(OH)4 not Al(OH)3? zeoblade 6 77607 Last post August 09, 2017, 04:59:33 AM
by bubblegumpi
MOVED: need acid to dissolve a nickel copper sleeve rivetted Arkcon 0 185 Last post August 06, 2017, 07:07:02 AM
by Arkcon
Basic VPESR Theory question PicturesOfLilly 8 527 Last post August 06, 2017, 04:27:30 AM
by Borek
MOVED: Making an Ammonium Chloride Solution. How? Arkcon 0 158 Last post August 05, 2017, 09:09:02 AM
by Arkcon
How does vacuuming sterile vials work? Colinitrogen 1 307 Last post August 03, 2017, 08:03:36 PM
by Vidya
(%w/w) to (%w/v) defencegrid 3 491 Last post July 27, 2017, 04:57:19 AM
by Vidya
denticity Vargulf 5 598 Last post July 27, 2017, 03:31:41 AM
by Vidya
Ionic bonding and variable valency confusion PicturesOfLilly 5 321 Last post July 27, 2017, 03:21:38 AM
by Vidya
stock preperation saly 1 243 Last post July 27, 2017, 03:11:14 AM
by Vidya
Emission line spectrum question? PicturesOfLilly 3 605 Last post July 23, 2017, 03:36:23 AM
by PicturesOfLilly
Avoiding over/underflow Error on Calculator? stopkillingme21 2 355 Last post July 21, 2017, 04:48:00 AM
by sjb
Determing whether a mixture will form a precipitate from Ksp calculation PopindaChopz98 3 385 Last post July 17, 2017, 04:37:28 PM
by Corribus
Molarity and unit conversions. confusedcollegestudent 3 396 Last post July 12, 2017, 12:49:25 AM
by P
Which of these reaction will not take place?" Kaspit 6 488 Last post July 06, 2017, 04:42:48 AM
by Babcock_Hall
calculation of freezing point scarmel 3 383 Last post July 04, 2017, 08:28:35 PM
by XeLa.
hybridisation « 1 2 » overlord16 16 1720 Last post July 04, 2017, 04:08:43 AM
by Irlanur
chlorhexidine gluconate color change gumusonur 0 285 Last post July 04, 2017, 03:07:55 AM
by gumusonur
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