An ionic compound. is more likely to dissolve in a polar solvent, such as water, than a non-polar solvent, such as hexane. always has a pH greater than 7 generates excess OH^- when dissolved in water. cannot be separated from another ionic compound in a mixture Chromatography techniques can be used for separation and absolute identification of substances when combined with the proper detector. True False pH is a measure of the acidity of an aqueous solution. True False In HPLC, the mobile phase is always a gas. True False