What do the numbers in front of electrolyte mixtures mean?

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Discussion Overview

The discussion revolves around the interpretation of numerical ratios in electrolyte mixtures, specifically focusing on examples like 1EC:1DEC and 3EC:7EMC. Participants explore what these numbers signify in terms of composition, such as whether they represent volume fractions, mass ratios, or other metrics. The conversation also touches on the meaning of "M" in the context of molarity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants suggest that the numbers in mixtures like 3EC:7EMC could represent volume fractions or mass ratios, but there is uncertainty about the specific convention used.
  • One participant clarifies that "M" indicates molarity, but the interpretation of the mixture ratios remains ambiguous.
  • Another participant points out that the ratios could refer to solvent ratios, but questions whether they denote mass, volume, or mole fractions, noting the lack of a standard convention.

Areas of Agreement / Disagreement

Participants do not reach a consensus on what the numerical ratios specifically represent, indicating multiple competing views on the interpretation of these mixtures.

Contextual Notes

There are limitations in the discussion regarding the definitions of the terms used and the absence of a clear convention for interpreting the ratios in electrolyte mixtures.

Who May Find This Useful

This discussion may be useful for individuals interested in electrochemistry, particularly those looking to understand the composition of electrolyte mixtures and the significance of numerical ratios in this context.

Pulik
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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
 
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"M" indicates molarity. The rest of the question is too garbled to make out.
 
Bystander said:
"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)
 
It's a solvent ratio. The electrolytes themselves are dissolved in the solvent(s). Mass? Volume? Mole fraction? There is no convention.
 
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)?
 

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