# Chemistry

## January 6, 2022

Open Learn – Discovering Chemistry

Anyone looking at undertaking this course with Open Learn, I have set up a thread on discourse to facilitate further discussion.

Chemistry lies at the centre of our modern life, playing a part in areas as diverse as the development of new drugs and materials, analysing our environment through to more mundane activities such as washing your clothes and making your tea. But to truly understand the role chemistry plays you need to have a sound grasp of a number of fundamental principles.

This free course, Discovering chemistry, introduces you to some of these concepts, beginning with the idea that everything that you can see is made of building blocks called atoms. This leads on to a look at the chemical elements and how they are arranged in the Periodic Table, enabling chemists to rationalise patterns in their chemical and physical behaviour.

Next you will consider chemical reactions, specifically how atoms combine with other atoms to form molecules, and how molecules combine with other atoms or molecules to form bigger molecules. You will meet simple (tried and tested) theories to explain the bonding in molecules and at how their shapes may be explained, and indeed predicted. And in a wider sense you’ll be looking at why reactions happen at all and how fast they go.

This is also a beginner’s level course in the language of the chemist; you’ll learn about symbols, formulas and how chemical equations which represent reactions are constructed. Finally you will see how chemists count atoms and molecules, essential for making up solutions of a known concentration in order to carry out a reaction, or performing a chemical analysis.


## December 24, 2021

Site Index

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#YearOfTheFediverse

#Zoo

## December 5, 2021

Science Daily : Articles on Plastics and Polymers

The two articles were posted to Mastodon.

Firstly a look at the problem of Micro-plastics

Secondly an article on Polymers

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## December 4, 2021

Growing Salt Crystals

Reposting this due to adding a link to a Science Forum post.

As Salt (Sodium Chloride) dissolves in water, you can grow salt crystals quite easily. There are lots of instructions on the internet, on how to do this with Salt, as well as other chemicals; such as, Alum (Aluminium Sulfate), Borax (Sodium Borate) for example.

For the purpose of my attempt, I used

*a conical flask from my old Chemistry set,
* a wooden lollipop stick, * string * paper clip (to hold the string in the solution)

This is illustrated in the first picture, while the 2nd is a photo of the resulting crystal formation.

Update 17/10/2021

I took more photos on the 4th October to illustrate further growth of the crystals

It is probably worth mentioning that table salt contains Sodium Chloride but also a Anti caking agent called Sodium Ferrycyanide which according to that wikipedia article is a yellow solid.

I am not sure if this somehow affects the growth or shape of the resultng crystals. At some point I should try the same experiment pure NaCl

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## October 28, 2021

Updated STEM display at Paignton Library

As next week is Chemstry week, I have further updated the display at Paignton library. Be sure to drop in and check out the info on offer.

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## October 25, 2021

Women in Chemistry

To celebrate International Women's day, Compound Chemistry have released a great poster celebrating the contribution women have made to Chemistry.

Posting here too, in the hope it will inspire more Women and Girls in Science and Chemistry.

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Graphic : Open Clipart

## August 3, 2021

Materials Science Development 2/8/2021

Manganese could make luminescent materials and the conversion of sunlight more sustainable

Sounds like an interesting development. You can read more on Science Daily [2]. I think the significant part of this discovery is that Manganese [2] is cheaper and more readily available. Please feel free, to open a thread on Discourse [3] in order to discuss further.

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## July 3, 2021

Screaming Jelly Baby

Depending on if you prefer Chemistry or Computer Science here are two takes on the Screaming Jelly baby.

Firstly Chemistry

Now lets look at the Raspberry Pi version. This is simply using a jelly baby as a switch to trigger a sound being played. So two wires inside the jelly baby connect together when the jelly baby is squeezed.

I prefer the Chemistry version, despite the fact it is probably far less interactive as in I don't think students are allowed to actually perform this demonstration.

## May 5, 2021

OpenLearn : Discovering Chemistry

Just signed upto Discovering Chemistry with Open Learn [1]. This is a 24 hour course from the Open University [2] via their OpenLearn platform.

This is partly for personal interest, partly for career development and will help me develop useful knowledge going forward. I have set up a thread on Discourse [3] to facilitate discussion.

I would like to learn more about Isotope shift , which is mentioned in a arXiv article [4] from 2017. This topic is probably beyond the scope of the chemistry course, but is a good starting point. Hopefully however this Chemistry course can build on what I already know about isotopes at least.

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## March 30, 2021

Abundances in Przybylski's star ( per-zib-ill-skee)

This looks like a really interesting paper, published on Oxford Academic [1], examining, what appears to be the unusual composition of Przybylski's star [2]. According to Wikipedia [3]* is in the “Southern constellation of Centaurus”

• See [4] for a better reference.

There seems to be quite a few heavier element detected.

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Related papers

This may also be useful / relevant

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DISCUSSION