April 21, 2019, 08:39:31 PM
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Problem of the Week Archive

Collection of all our problem of the week threads.

667 Posts
57 Topics

Last post by Borek
in Re: Not a problem of the...
on November 19, 2017, 06:34:32 AM

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Stoichiometry calculator

Started by Borek | Last post by safracatz April 12, 2019, 03:50:56 AM

5 Replies
29417 Views
Last post April 12, 2019, 03:50:56 AM
by safracatz
What is omniphobic and omniphilic of polar and apolar liquids?

Started by AussieKenDoll | Last post by wildfyr April 19, 2019, 02:21:58 PM

2 Replies
222 Views
Last post April 19, 2019, 02:21:58 PM
by wildfyr
Trouble applying nernst equation

Started by isears | Last post by mjc123 April 18, 2019, 12:10:19 PM

4 Replies
1418 Views
Last post April 18, 2019, 12:10:19 PM
by mjc123
Sediment in the heat exchanger

Started by DMV | Last post by DMV April 18, 2019, 06:18:48 AM

2 Replies
737 Views
Last post April 18, 2019, 06:18:48 AM
by DMV
How to seal 3-neck flask containing air sensitive chemicals

Started by NAC2019 | Last post by wildfyr April 16, 2019, 08:34:29 AM

3 Replies
1245 Views
Last post April 16, 2019, 08:34:29 AM
by wildfyr
Oxidation and standard potential difference

Started by oilypiggy | Last post by mjc123 April 15, 2019, 02:59:08 PM

6 Replies
1364 Views
Last post April 15, 2019, 02:59:08 PM
by mjc123
Standard Reduction Potential

Started by oilypiggy | Last post by chenbeier April 15, 2019, 01:35:06 PM

1 Replies
1199 Views
Last post April 15, 2019, 01:35:06 PM
by chenbeier
[Electrochemistry] Need help designing a battery - any ideas?

Started by 4gkenzy | Last post by Enthalpy April 14, 2019, 07:16:16 PM

9 Replies
1542 Views
Last post April 14, 2019, 07:16:16 PM
by Enthalpy
Alkene metathesis question

Started by spidermclovin | Last post by Enthalpy April 14, 2019, 07:10:25 PM

1 Replies
1298 Views
Last post April 14, 2019, 07:10:25 PM
by Enthalpy
Calculate concentration ratio

Started by kdbmvp | Last post by isears April 14, 2019, 11:09:48 AM

2 Replies
1244 Views
Last post April 14, 2019, 11:09:48 AM
by isears
Calculate amount of acid needed in a solution to lower pH

Started by seerrah_ | Last post by AWK April 13, 2019, 08:54:54 AM

3 Replies
1225 Views
Last post April 13, 2019, 08:54:54 AM
by AWK
mg/ml to moles

Started by Notgoodatcalculations | Last post by AWK April 12, 2019, 05:14:11 PM

7 Replies
1175 Views
Last post April 12, 2019, 05:14:11 PM
by AWK
Using hydroxypropyl-β-cyclodextrin to create a deodorizer

Started by Dietitian | Last post by wildfyr April 11, 2019, 08:18:17 AM

5 Replies
5155 Views
Last post April 11, 2019, 08:18:17 AM
by wildfyr
Question about Half-Life

Started by willrowland | Last post by Enthalpy April 09, 2019, 08:15:25 AM

2 Replies
1128 Views
Last post April 09, 2019, 08:15:25 AM
by Enthalpy
3 Replies
1196 Views
Last post April 08, 2019, 01:06:25 AM
by naclh2oquestion
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