A very common question I get is âhow much is concrete per yardâ? It is a somewhat difficult question to answer because suppliers are frequently changing their prices, and there are many different pricing factors. However, in general the cost per yard as of today (March 29, 2011) is as follows: 2500 psi (I never use this) = $95-110 (Charlotte NC Metroâ Concrete Contractor Average) 3000 psi (most common) = $100-115 (Charlotte NC Metroâ Concrete Contractor Average)
Electrolytes are compounds which produce ions when in water. Soluble ionic compounds do this by breaking up into the constituent ions in water. But if the ionic compound is not soluble, such as lead chloride, then the compound does not break up into ions, and is thus not an electrolyte.
Ionic salts conduct electricity when their ions are free to move towards oppositely-charged electrodes. Solid ionic compounds do not conduct electricity because the ions cannot move: they can only vibrate around fixed positions in a rigid, three-dimensional structure.ead(II) bromide is an electrolyte because it can conduct electricity when molten and when it is dissolved in water (in aqueous solution) but not when it is solid. Metals differ from electrolytes because they conduct electricity when they are solid as well as when they are molten.