Re: [化學] 一題化學問題
※ 引述《RICKC (RICKC)》之銘言：
: a 100ml sample of the triprotic weak acid H_3A(0.2M)is titrated with 0.2M of
: NAOH.Bsides water and sodium ion,what are the major species after 180ml of
: 0.2M NAOH is added in the titration?答案是H_2A^-,HA^2-
: 請問要怎麼算?
H3A + OH^ -> H2A^ + H2O
前 20mmol 36mmol
後 0 16mmol 20mmol 20mmol
H2A^ + OH^ -> HA2^ + H2O
前 20mmol 16mmol
後 4mmol 0 16mmol 16mmol
固得知之後存在的離子型態 這還可以考緩衝溶液的計算 問你他的pH
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