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.
When a molten (melted) ionic compound is electrolysed: the positive ions are discharged at the cathode. the negative ions are discharged at the anode. For example, during the electrolysis of molten lead bromide: lead ions, Pb 2+ , move to the cathode and are discharged as lead.owever, the ions are in fixed positions in solid ionic compounds [compound: A substance formed by the chemical union (involving bond formation) of two or more elements.] - they cannot move around, so electrolysis does not work in solids. Ions in ionic solids are arranged in a giant lattice and cannot move around.