å®éªç®çï¼å¦ä¹ ç¨é»è¯äºç²é
¸æ°¢é¾ä½åºåç©æ å®NaOH溶液ã
å®éªåçï¼ä»¥é
é
为æ示åï¼ç¨åºåç©é»è¯äºç²é
¸æ°¢é¾ï¼KHC8H4O4ï¼æ å®NaOH
溶液çæµåº¦ï¼ååºå¦ä¸ï¼KHC8H4O4+NaOH=KNaC8H4O4+H2O
仪å¨ä¸è¯åï¼1ã仪å¨ï¼ç§°éç¶1åªï¼250mlé¥å½¢ç¶3åªï¼å¡ææ´ç¶1åªï¼50ml碱å¼æ»´å®ç®¡1æ¯
2ãè¯åï¼NaOH溶液ï¼é»è¯äºç²é
¸æ°¢é¾åºåè¯åï¼é
é
æ示åï¼1%ä¹é溶液ï¼
å®éªæ¥éª¤ï¼1ãç¨åéæ³å¨åæ天平ä¸å确称åé»è¯äºç²é
¸æ°¢é¾ï¼1-2gï¼ä¸ä»½ï¼
æ¾å
¥250mlé¥å½¢ç¶ä¸ã
2ãç¨50mlç
®æ²¸ä¸å·å´çè¸é¦æ°´ä½¿ä¹æº¶è§£ï¼å å
¥1-2æ»´é
é
æ示åï¼ç¨
NaOH溶液滴å®è³æº¶æ¶²å微红è²ä¸ååéå
ä¸éè²ï¼å³ä¸ºç»ç¹ã
3ãå¹³è¡æµå®ä¸æ¬¡å¹¶è¦æ±ç¸å¯¹å¹³ååå·®åºå°äº0.2%ã
4ãæä¸å¼è®¡ç®NaOH溶液çæµåº¦ï¼
Cï¼NaOHï¼=m(é»è¯äºç²é
¸æ°¢é¾)*1000/Mï¼é»è¯äºç²é
¸æ°¢é¾ï¼*Vï¼NaOHï¼
追é®è¿ä¸ªï¼ï¼ä¸è¯¦ç»åèå
ï¼èä¸è²ä¼¼åçå°è¿ããã
追çåµåµãæä¹åªè½æä¾è¿äºäºã