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Preparation of Vanadium from its Pentoxide
Aqueous chemistry of vanadium is amazingly complicated, especially for the metal in oxidation state ...
9-1-2019 at 04:52
by: woelen
Flu + NH3 or HCl vapours
Inhaling HCl is very bad for your health and may even increase the risk of cancer. It recently was d ...
8-1-2019 at 03:34
by: woelen
My half-assed electrolysis tank
With NaHCO3 the conductivity of the solution will be very low. NaHCO3 is not strongly soluble, you e ...
7-1-2019 at 05:52
by: woelen
Question about h2s and phosphine
[rquote=566025&tid=115153&author=draculic acid69] I read somewhere that hydrogen sulphide bu ...
21-12-2018 at 02:00
by: woelen
Reliable VPN services?
WGTR's script works fine, it deletes the standard route to internet which I get from my router's DHC ...
20-12-2018 at 05:44
by: woelen
Post #2000 and an apology for accidentally deleting a thread
The loss of that thread is a small accident and I appreciate very much that Melgar has been honest a ...
14-12-2018 at 12:54
by: woelen
Reliable VPN services?
Yes, networking is fun, but at times also frustrating.
In my home I use a pfSense router (made from ...
14-12-2018 at 00:17
by: woelen
Reliable VPN services?
Issue now seems to be fixed. I used WGTR's scripts.

The scripts give me a VPN connection which is ...
12-12-2018 at 12:07
by: woelen
K2Cr2O7 from (NH4)2Cr2O7
Add KOH to the compound. Use a little excess (NH4)2Cr2O7. Take 1.8 moles of KOH for each mole of (NH ...
12-12-2018 at 06:24
by: woelen
Dimethylmercury cold storage?
Someone is trolling here. Do you really believe that a school has dimethylmercury in stock? And on t ...
12-12-2018 at 00:15
by: woelen
Copper sulfate has become "chalky white" after prolonged air exposure
The extraction of water from crystals indeed happens. Slowly by dry air, quickly with strong dehydra ...
10-12-2018 at 07:43
by: woelen
Revealing Reactions that are Potentially More Complex
The reaction between NO and O2 is much faster than what you suggest. I have done this reaction quite ...
10-12-2018 at 00:36
by: woelen
Potassium permanganate
The fact that it is a list 2 precursor for making illicit drugs does not mean it is forbidden to pos ...
7-12-2018 at 01:19
by: woelen
Reliable VPN services?
@WGTR: I'll try using OpenVPN and the scripts in the last post. This is a nice weekend job for me :) ...
6-12-2018 at 06:39
by: woelen
Zinc chloride from zinc used for construction - toxicity issues
The compounds, used in the solution are very cheap and the (financial) losses will be minimal. If yo ...
5-12-2018 at 00:00
by: woelen
Reliable VPN services?
@WGTR: This indeed is with the kill switch enabled. I also checked the routing table without kill sw ...
4-12-2018 at 13:38
by: woelen
Reliable VPN services?
WGTR, you have quite some network knowledge and a good understanding :o
The setup, after connecting ...
4-12-2018 at 12:12
by: woelen
Tired of reporting spam
Indeed, if there is a lot of spam, then it is short-lived. Things have become much better with Melga ...
4-12-2018 at 07:27
by: woelen
Zinc chloride from zinc used for construction - toxicity issues
Zinc indeed can contain tiny amounts of As and Sb. I do not know of Se-impurities. I would not worry ...
4-12-2018 at 07:26
by: woelen
Reliable VPN services?
No need to say sorry, it was my own choice to go to that site.
But for future tests or real downloa ...
4-12-2018 at 04:25
by: woelen
Reliable VPN services?
NordVPN is much faster than 2 MByte/s. I obtained a speed of over 10 MByte/s (which is 80 Mbit/s). M ...
4-12-2018 at 02:20
by: woelen
Reliable VPN services?
[rquote=558656&tid=61120&author=Tsjerk][...]The automatic uploading is the problem. What the ...
4-12-2018 at 00:43
by: woelen
Reliable VPN services?
I looked into the routing table on my Linux system.

If I do a "netstat -rn" I see two entries. On ...
4-12-2018 at 00:28
by: woelen
Reliable VPN services?
P2P is not really important for me, but good to know they support this. I have downloaded a movie oc ...
3-12-2018 at 08:30
by: woelen
Reliable VPN services?
I sometimes use NordVPN, but not for accessing sciencemadness and posting on sciencemadness.

Nord ...
3-12-2018 at 07:37
by: woelen
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