Questions tagged [mhchem]

mhchem is third-party extension for MathJax, for formatting chemical formulas and equations in particular on Chemistry Stack Exchange, via the \ce command. Read more here - mhchem.github.io/MathJax-mhchem/

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132 votes
10 answers
23k views

FAQ: How can I format math/chemistry expressions on Chemistry Stack Exchange?

This FAQ explains and gives examples how to typeset chemical equations, quantities and units, and mathematical expressions on Chemistry Stack Exchange (rather than posting pictures, which you can't ...
-2 votes
1 answer
97 views

Why are compound formulae not rendering properly using \ce tag?

Basically, everywhere I use the \ce tag on chemistry stack exchange, I get wrong formulae. The subscripts are becoming superscripts while the superscripts are becoming subscripts. Is it just me or is ...
8 votes
1 answer
67 views

Extra spacing before mhchem super/subscripts

I'm not entirely sure if this is still the correct platform for mhchem issues, but I've noticed a mildly annoying extra space that occurs just before ...
17 votes
0 answers
373 views

Introducing: Markdown Shortcuts for Stack Exchange

Inserting Mathjax and making posts look nice is rewarding, but it can often be, well, repetitive and boring :( Well, not any more. I have been testing and improving this userscript for quite some time ...
2 votes
1 answer
78 views

Problem in rendering with arrow

Screenshots of MathJax text, CH3-CHOH ->[H2SO4][\Delta] CH2=CH2 while editing (lower stuffs are cropped): after editing, on post page (both stuffs are cropped)...
3 votes
1 answer
57 views

Why is rendering of this pu markup weird?

$\pu{1.08378‬0 mol}$ renders as $\pu{1.08378‬0 mol}$ I think mhchem renders \pu.
2 votes
1 answer
75 views

Where can I find a more extensive reference for mhchem?

I'm still new to this stack community and getting used with the formatting. I've read the article about this matter and while it explains that mhchem is supported and shows examples but only offer ...
1 vote
1 answer
257 views

Two one-sided arrows from mhchem MathJax extension do not render properly upon conversion to pdf

I am using pdfkit-pythonbased on wkhtmltopdfto convert into pdf a text that contains MathJax ...
6 votes
1 answer
91 views

Formatting hints no shown to user

Why are the basic (math/chemical) formatting hints https://chemistry.stackexchange.com/help/notation not always displayed next to the form where users enter new questions, and why is the elementar \ce{...
5 votes
1 answer
434 views

MathJax mhchem editor

Is there a tool (application, online service) that helps writing the ugly formatting MathJax + mhchem code? I mean things like just typing Ctrl-B to get the selected text to bold is something else ...
7 votes
1 answer
133 views

Is there a site on ChemSE to practice mhchem and mathjax?

Is there a site on ChemSE to practice mhchem and mathjax? Or does one just learn while asking or answering a question.
4 votes
1 answer
191 views

Polymer formula bond-bracket crossing representation

I could not find any rule in Graphic representations (chemical formulae) of macromolecules (IUPAC Recommendations 1994) that would state that the bonds at the ends of the constitutional units must ...
3 votes
1 answer
33 views

Eliminate huge-locant-marked (by \overset) atom side space

Is it possible to elegantly eliminate side whitespace around the base under the overset, which is longer than the base? E.g. if we wanted to talk about the 123456789th carbon atom of a huge poly(...
2 votes
1 answer
43 views

Why two different print styles for the x's?

Created the rather nasty markup below. Why are there two different print styles for the x's? ...
7 votes
1 answer
2k views

What is the standard way to denote physical states in a chemical reaction?

A lot of older posts that I come across have their reactions written like: $$\ce{Cu(NO3)2_{(aq)} + 2NaHCO3_{(s)} -> CuCO3_{(s)} + 2NaNO3_{(aq)} + H2O_{(l)} + CO2_{(g)}}$$ (...
5 votes
1 answer
123 views

What to do if mathrm is hugging physical units?

There was some consensus about how to write physical units from mid-2016 onwards on Chem.SE, as apparent from this post. However, it seems like the damage had already been done by that time. I say so ...
7 votes
2 answers
122 views

Does the rendering of the precipitation and gas symbols need improvement?

Doing some markup and noticed something that annoyed me. I wanted to indicate a precipitate or gas such as: \begin{array}{ll} \text{Markup} & \text{Displays}\\\hline \text{\ce{AgCN v + KNO3}} &...
7 votes
2 answers
145 views

Plus-minus sign messes with mhchem's \pu command

The following bug report has been fixed, here is screenshot of the question in its original state. Explicit error values are usually given as an interval with $\pm$. When I try to typeset this with ...
7 votes
4 answers
164 views

Chemical formulas with fractional numbers are displayed wrongly

According to mhchem manual the following code \ce{0.5H2O} should produce the following result But it does not. Instead, I ...
9 votes
3 answers
2k views

Green checkmark or red X with Mathjax/mhchem?

Is there a way to put a green check mark in the body of my text using MathJax/mhchem Syntax? Or a red X to indicate that this thinking is wrong? Something like this: I want to use it while double ...
21 votes
4 answers
817 views

Poll: mhchem syntax for electron configuration

As the author of mhchem, I am considering to add electron configuration to \ce. I decided to give it a little bit spacing for readability: $\mathrm{[Kr]\mskip2mu4d^{...
8 votes
1 answer
113 views

Dimensional analysis with chemistry equations on stack exchange?

I know we use Mathjax/mhchem. What I would like to know, is if its possible to cross out units as part of dimensional analysis. Here is an example of the desirable effect:
9 votes
2 answers
184 views

What happened to writing ions with \ce?

I took a look at some old questions and noticed that some \ce{} expressions were not working as they should. I am especially interested in how to write polyatomic ...
15 votes
1 answer
296 views

Mhchem feature request: strikethrough and crossout reaction arrows

mhchem is a great $\mathrm{\LaTeX}$ and MathJax package and I don’t know what we would do without it. Especially its way to format reaction equations is great. ...
8 votes
2 answers
218 views

Formulae with charge and number of atoms (e.g. sulfate ion) aren't displayed properly

I just noticed that there is a problem when using mhchem to display structures such as sulfate's. According to its manual, they should appear as But using ...
9 votes
1 answer
90 views

Mhchem broken on mobile

That's how it looks right now. I don't recall this being a problem earlier. It's like this on other questions as well. Link to the answer in question: https://chemistry.stackexchange.com/a/55285/...
12 votes
2 answers
180 views

Where to offer mhchem support?

I am about to finalize the MathJax/mhchem 3.0.0 (which is quite a large update). To my knowledge, the largest user group can be found here. Would you mind if I put a link in the documentation to meta....
11 votes
2 answers
152 views

Unknown Notations

Are the following notations official? Can I find them in a colored IUPAC book? Do they have a name, I could google for? (I need this to judge whether to support this with mhchem or not.) Stability of ...
-1 votes
1 answer
161 views

Is HTML banished?

Sorry if the question was already discussed, but it’s IMHO unlikely, given (mhchem) tag without a wiki. I’m new here, as a post writer. Today I saw my post edited by a high-rep user. The main intent ...
10 votes
1 answer
319 views

How to solve mhchem/MathJax rendering problems

Edit: This is not a bug, it is a feature, see my answer post. While recently directing a new user to this meta post about formatting using MathJax, I noticed that some components were not rendering ...
24 votes
1 answer
677 views

Enable mhchem mathjax extension

Mathjax 2.0 supports the mhchem extension. Could we enable it? It will save us lots of time in typesetting chemical formulae. How to enable the extension
17 votes
4 answers
1k views

'ce' prepended to equations in url slug?

I asked a question, titled https://chemistry.stackexchange.com/questions/636/reactions-of-metals-with-cehcl-ceh2so4-cehno3, and noticed that the formulas had 'ce' prepended to them in the url: ...