Making chemical solutions

An important part of Chemistry is the ability to make up solutions of a known concentration. This can sound quite complex, however it doesn't need to be.

The following is some simple instructions that will produce 250m of 1molar concentration of Sodium Chloride

I have made this solution up using pure Sodium Chloride, from a chemical supplier [1], rather than table salt which contains Sodium Ferrocyanide. If you need extra help with this try asking on Science forums [2] as there is a section on there for home chemistry.

I am also on the IRCNow network, where we are starting up a channel to discuss amateur / home science.

Links

1 Better Equipped 2 Science Forums 3 Amateur Science

Tags

#Chemistry,#NaCl,#SodiumChloride,#Molar,#Mol,#Solution,

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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

• Science forum discussion
• Science Forums

Tags

#Chemistry,#Salt,#SodiumChloride,#NaCl,#Crystals

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