Chemistry Forum

Hello, I am an analyst working in a pesticide laboratory. There are many solid CRMs in the lab. It is written on each of them which solvent it should be dissolved with. But I want to know why this solvent should be used. Thank you for your help.

It depends on the molecule structures, is it water soluble or only fat soluble. So a adapted solvent has to be used.

That’s right . It depends of the structure or the bond if is polar or non polar . Ionic or covalent bond because “similar attracts similar “. That’s it !

Choosing the right solvent depends on the specific application or process you're working on. Here are some general guidelines to help you select the appropriate solvent:

1. Purpose of the Solvent:
- Dissolving Solids: If you need to dissolve a solid, choose a solvent that the solid is soluble in. Check solubility charts or literature for guidance.
- Chaical Reactions: For chaical reactions, the solvent should not react with the reactants or products. It should also provide an environment where the reaction can occur efficiently.
- Extraction: If you're extracting a compound, select a solvent that selectively dissolves the desired substance while leaving impurities behind.

2. Polarity:
- Polar Solvents: Used for polar compounds (e.g., water, methanol, acetone).
- Nonpolar Solvents: Used for nonpolar compounds (e.g., hexane, toluene).

3. Boiling Point and Evaporation Rate:
- Choose a solvent with a suitable boiling point for your process. For example, if you need a solvent to evaporate quickly, select one with a low boiling point.

4. Safety and Toxicity:
- Consider the safety and toxicity of the solvent. Ensure proper ventilation and protective equipment if using hazardous solvents.

5. Compatibility with Equipment:
- Ensure the solvent is compatible with the materials of your equipment. Some solvents can damage certain materials or react with tha.

6. Cost and Availability:
- Sometimes practical considerations like cost and availability can influence the choice of solvent.

If you provide more details about what you're trying to achieve, I can give more specific advice!

It’s an excellent explanation about majority things occurs when a solvent dissolve some !
Thanks