化学计量点时： [MYL Ml,v pM'+pY'p=IgK'My-g[MY 终点时： Kw一T [MY 可，Yp pM'p+pY=IgK'y-Ig MYp ep接近spMY]lep=[MYIsp两式相减 ApM'+APY =0 △pM'=-△pY         s p s p MY s p s p s p s p MY pM ' pY' lgK' lg M Y M ' Y' M Y K' = 即 + = −         ep ep MY ep ep ep ep MY pM' pY' lgK' lg M Y M ' Y' M Y K' = 即 + = − ΔpM'+ΔpY' = 0 ΔpM'= -pY' 化学计量点时: 终点时： ep接近sp [MY]ep≈[MY]sp 两式相减