Your other hand need to hold the cylinder to prevent it from slipping. The tip of your eyedropper must be resting versus the inner area with the cylinder and slightly below the floor on the solvent layer. A little bit factoid here; an H+ ion is simply a proton. A https://buy-changa-copyright-online-in73940.liberty-blog.com/35772482/buy-5-meo-copyright-solution-for-sale-for-dummies