What do the numbers in front of electrolyte mixtures mean?

[Pulik]

Hello Everyone,

I have a question about electrolytes. What do the numbers in front of the electrolytes mixtures mean?

For example, let's say we have:
1EC:1DEC or 3EC:7EMC or 3EC:7EMC:1DMC

Is that the volume fraction? If, I have for example 100 grams of 3EC:7EMC, would this mean 30 grams of EC and 70 of EMC? Moreover, sometimes there is a capital M in front, such as 1M or 1.2M, what does this number mean? Can anyone please explain this?

Thank you in advance!

P.S. Can anyone recommend me some literature for this? Something that covers the basics of electrolytes and electrochemistry

 

[Bystander]

"M" indicates molarity. The rest of the question is too garbled to make out.

 

[Pulik]

"M" indicates molarity. The rest of the question is too garbled to make out.

Thank you for the answer. I think the question is pretty clear. But anyways, I will truncate the question: How can one read a mixture like this 3EC:7EMC (where EC is Ethylene Carbonate and EMC is ethylmethyl carbonate)? What does 3 and 7 represent? Sometimes, it is written as EC:EMC (3:7 of wt) or simply EC:EMC (3:7)

 

[Bystander]

It's a solvent ratio. The electrolytes themselves are dissolved in the solvent(s). Mass? Volume? Mole fraction? There is no convention.

 

[Pulik]

Thank you! Can you please put it in a formula or can you please send me a link where I can read about solvent ratio in electrolytes (with notations)?