2017年7月18日 · KIT-6 is a mesoporous silica, the chemical formula is the same for all silica which is $\ce{(SiO2)_n}$. The tridimensional structure though is usually represented as Share

2023年2月9日 · Efficient ring perception for the Chemistry Development Kit. Journal of Cheminformatics, 6(1), 1–12 ...

2021年8月8日 · 6 $\begingroup$ @Alchimista As 30% H2O2 still contains 70% of water, there is still similarity. I suppose it must have something to do with the overall H2O2 concentration and perhaps also relative H2O2 stability alone and in H2SO4.

2017年9月24日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

edited Nov 6, 2017 at 23:58. Tomáš Zato. 2,538 4 4 gold badges 40 40 silver badges 57 57 bronze badges.

2014年4月26日 · Thus, when applied to book-examples, which $\text{p}K_\ce{a}$ values from 3 to 6, and the concentrations from $1.0$ to $\pu{1.0E-4 mol L-1}$, the assumptions are valid and the equations can be used, providing good approximations of $\ce{pH}$ values. Acknowledgement. Thanks to @MaxW for draw attention to limitations of assumptions. Reference

2017年8月1日 · You can use GChemPaint, which is available on the repositories of many popular distributions.Among its many components for drawing structures, it has a specific tool for Newman's projections.

2017年9月5日 · I stored some Klean-Strip denatured alcohol in a test tube and capped it with a rubber stopper. I did this in preparation for a chemistry demonstration. When I opened my kit a few days later at the event, I was surprised to find that the ethanol in the tube had turned a definite urine yellow.

2019年6月15日 · DPD (N,N-diethyl-p-phenylenediamine) is used in free chlorine colorimetric analysis since it reacts with Hypochlorous acid and Hypochlorite ions acquiring a pinkish color that can be quantitatively related to the concentraction of …

2016年2月7日 · It is different if you consider fish living in such water. pH from several ppm would not drop below 5, which is close to rainwater, but significantly lower than normal river or sea water (6-7 and 7-8 respectively). You should consult specialized literature in the case.