1.将2.44g含结晶水的氯化钡晶体溶解,配成100ml溶液,取出25ml,溶液与20ml,0.25mol/L的硝酸银溶液恰好完全反应.求此氯化钡晶体的化学式.

设为BaCl2.xH2O20ml,0.25mol/L的硝酸银溶液,含Ag+离子：20/1000*0.25=0.005 mol2.44g含结晶水的氯化钡晶体,含Cl-是0.005*4 mol,含BaCl2.xH2O 0.01mol,BaCl2.xH2O 分子量：2.44/0.01=244x=(244-137-35.5*2)/18=2氯化...