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Chemistry Olympiad and other competitions

Preparing to Chemistry Olympiad or any other competition? That's the place to ask your question.

765 Posts
123 Topics

Last post by Borek
in Re: IChO 2025 preparator...
on June 07, 2025, 02:01:38 AM

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Net charge on polyatomic phosphate and phosphite ion

Started by Jignesh77 | Last post by Jignesh77 May 26, 2025, 01:42:46 PM

8 Replies
7858 Views
Last post May 26, 2025, 01:42:46 PM
by Jignesh77
Which pungent odor does sodium fluoride usually emit?

Started by cjemistry888 | Last post by Babcock_Hall April 03, 2025, 07:32:58 AM

4 Replies
5876 Views
Last post April 03, 2025, 07:32:58 AM
by Babcock_Hall
Crystalizing Ammonium Nitrate

Started by Working_Mud7894 | Last post by Working_Mud7894 March 23, 2025, 02:38:27 PM

4 Replies
2465 Views
Last post March 23, 2025, 02:38:27 PM
by Working_Mud7894
MOVED: Addition of HCl to 2-methyl-1,3-cyclohexadiene

Started by Borek | Last post by Borek March 18, 2025, 03:10:03 PM

0 Replies
1890 Views
Last post March 18, 2025, 03:10:03 PM
by Borek
MOVED: HCl addition to 5-methyl-2-hexyne

Started by Borek | Last post by Borek March 17, 2025, 03:58:52 AM

0 Replies
1849 Views
Last post March 17, 2025, 03:58:52 AM
by Borek
Chemical reactions and limiting reagents

Started by prem0069 | Last post by Borek January 31, 2025, 03:41:09 AM

1 Replies
6158 Views
Last post January 31, 2025, 03:41:09 AM
by Borek
is this question incomplete? calculating percent yield

Started by rambo007 | Last post by Hunter2 January 29, 2025, 12:47:04 PM

4 Replies
7087 Views
Last post January 29, 2025, 12:47:04 PM
by Hunter2
what is color fading in clothes

Started by omkar0652 | Last post by DrCMS January 27, 2025, 04:58:24 AM

1 Replies
6566 Views
Last post January 27, 2025, 04:58:24 AM
by DrCMS
Temp. Change in adiabatic process

Started by Hunter2002 | Last post by mjc123 January 19, 2025, 04:52:55 PM

1 Replies
6432 Views
Last post January 19, 2025, 04:52:55 PM
by mjc123
If a Weak Base is added to a Weak Acid, what's the pH

Started by AntonioVerde | Last post by Borek January 12, 2025, 01:09:06 PM

3 Replies
7471 Views
Last post January 12, 2025, 01:09:06 PM
by Borek
Exercise about pH

Started by AntonioVerde | Last post by Borek January 08, 2025, 11:58:41 AM

9 Replies
8588 Views
Last post January 08, 2025, 11:58:41 AM
by Borek
Reduction of potassium permanganate

Started by emma.qmc | Last post by Hunter2 January 05, 2025, 08:15:55 AM

7 Replies
8049 Views
Last post January 05, 2025, 08:15:55 AM
by Hunter2
Moisture and recrystallization

Started by lurk | Last post by lurk January 03, 2025, 01:54:09 AM

0 Replies
6735 Views
Last post January 03, 2025, 01:54:09 AM
by lurk
Substitution reaction of Hexaaquacopper(II) and ammonia

Started by Perci | Last post by Hunter2 December 27, 2024, 01:36:09 AM

7 Replies
7414 Views
Last post December 27, 2024, 01:36:09 AM
by Hunter2
Mass spectrometry A level

Started by plasos | Last post by Perci December 25, 2024, 08:58:37 AM

3 Replies
7718 Views
Last post December 25, 2024, 08:58:37 AM
by Perci
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