▁will ▁remain ▁constant ▁and ▁independent ▁of ▁the ▁total ▁quantity ▁of ▁A ▁( h ence ▁), ▁so ▁at ▁any ▁given ▁temperature : ▁ ▁Distribution ▁constants ▁are ▁useful ▁as ▁they ▁allow ▁the ▁calculation ▁of ▁the ▁concentration ▁of ▁remaining ▁analy te ▁in ▁the ▁solution , ▁even ▁after ▁a ▁number ▁of ▁sol vent ▁extra ctions ▁have ▁occurred . ▁They ▁also ▁provide ▁guidance ▁in ▁choosing ▁the ▁most ▁efficient ▁way ▁to ▁conduct ▁an ▁extract ive ▁separation . ▁ ▁Thus , ▁the ▁concentration ▁of ▁A ▁remaining ▁in ▁an ▁a que ous ▁solution ▁after ▁i ▁extra ctions ▁with ▁an ▁organ ic ▁sol vent ▁can ▁be ▁found ▁using : ▁ ▁( where ▁[ A ] i ▁is ▁the ▁concentration ▁of ▁A ▁remaining ▁after ▁extract ing ▁Va q ▁mill il it res ▁of ▁solution ▁with ▁the ▁original ▁concentration ▁of ▁[ A ] 0 ▁with ▁i ▁port ions ▁of ▁the ▁organ ic ▁sol vent , ▁each ▁with ▁a ▁volume ▁of ▁V org ). ▁ ▁References ▁ ▁Category : Ch rom at ography <0x0A> </s> ▁At la com ul co ▁is ▁a ▁city ▁and ▁municipality ▁located ▁in ▁the ▁north west ▁of ▁the ▁State ▁of ▁Mexico ▁in ▁central ▁Mexico , ▁ ▁from ▁the ▁state ▁capital ▁of ▁Tol uca . ▁The ▁name ▁is ▁derived ▁from ▁the ▁N ahu at l ▁phrase ▁" at la com ul li " ▁which ▁means ▁" where ▁there ▁are ▁well s ." ▁The ▁city , ▁with ▁a ▁population ▁of ▁ 2 0 , 4 7 7 ▁is ▁surrounded ▁by ▁rural ▁area ▁in ▁which ▁ 7 5 % ▁of ▁the ▁rest ▁of ▁the