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<p>[QUOTE=&quot;John Burgess, post: 7712598, member: 105098&quot;]Pure acetone is a pH7 same as pure water/distilled water. Tolulene [Bmim][BF4] (3.16 to 4.63)and [Bmim][PF6]&nbsp; (5.57 to 7.55)</p><p>With tolulene, you need to be sure of the formula for the right composition for the pH range (stay away from [BF4] but even then it&#039;s temperature dependent to maintain pH so results can vary considerably compared to acetone which is a stable pH7 at any temp and will just rapidly evaporate/vaporize as the downside in higher temps.</p><p><br /></p><p>6.5 -7.5 isn&#039;t a big deal in my opinion below 6 and above 8 is getting either acidic or alkaline and starts to get sketchy when it comes to reactions with metals.</p><p><br /></p><p>But I&#039;m not a chemist or scientist, just a hobbyist. Someone that is and knows this stuff better than me with more experience I&#039;m Sure can punch a hole or two in what I wrote or explain it better.</p><p><br /></p><p>And yes as someone pointed out water is also a solvent. Water is the solvent, salt is the solute when dissolved in the water.. salt water is the solution. So yes it&#039;s a solvent that can dissolve solids. Same goes with &quot;hard&quot; or &quot;soft&quot; water. The dissolved solids in the water alter the pH of the water up or down. Which is why tap water could be bad or using the same pure water or acetone over and over could be bad as it picks up more dissolved solids.[/QUOTE]</p><p><br /></p>

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