ããé
å¶æ³¨æäºé¡¹
ãã1.è¯åè¦æè¾å¥½çè´¨ç¿è¯åå为ä¼çº§çº¯ï¼ä¿è¯è¯åï¼Guaranteed reagent,G.R.)ï¼åæè¯å(Antalytical reagent, A. R.)åå¦çº¯(Chemical pureï¼C. P.)åå®éªè¯å(Laboratory reagent, L. R.)ççãåå¦è¯åï¼æè´¨è¾å¤ãåªå¨ä¸ªå«æ
åµä¸åºç¨ãå¦é
æ´æ¶²ç¨çç¡«é
¸ãé
å¹²æåçæ°¯åéçã
ãã2.è¯å称ä¸è¦ç²¾ç¡®ã
ãã3.é
å¶è¯åç¨æ°´åºç¨æ°é²çå»ç¦»åæ°´æåè¸é¦æ°´ï¼æ¯çµéå¼å¨50ä¸æ¬§å§ä»¥ä¸ï¼PHå¨5.5-7.0ä¹é´æå¯åºç¨ï¼å¨ç»ç»å¹å
»çç¹æ®ç¨éæ¶åºæ³¨ææ¤é¡¶è¦æ±ãé
å¶ä¸è¬å9kç¨æº¶æ¶²åªè¦æ±ç¨åçè¸é¦æ°´æå»ç¦»åæ°´.
ãã4.é
好åç溶液ï¼åºç«å³é¤èå¤ç(å¦é«åçèãæ½æ»¤æå æèç©è´¨),以é²æèçé¿ã
ãã0.511x1/L pH9.57é
¸çç¼å²æ¶² NaHCO2 3.70g Na2CO3 0.60g 溶äº600.00mlãè¸é¦æ°´ä¸å³å¾ãä¸ç¨æ¶å¡ç´§ç¶å¡.以å
å¸æ¶ç©ºæ°ä¸äºæ°§å碳使PHä¸éãæ好å°éé
å¶ã
温馨提示:答案为网友推荐,仅供参考