ÌâÄ¿ÄÚÈÝ
£¨9·Ö£©ÓÃÖк͵ζ¨·¨²â¶¨ÉÕ¼îµÄ´¿¶È£¬ÈôÉÕ¼îÖв»º¬ÓÐÓëËá·´Ó¦µÄÔÓÖÊ£¬ÊÔ¸ù¾ÝʵÑé»Ø´ð£º
£¨1£©×¼È·³ÆÈ¡ÉÕ¼îÑùÆ·4.1g£¬½«ÑùÆ·Åä³É250mLµÄ´ý²âÒº£¬ÐèÒªµÄÒÇÆ÷ÓÐСÉÕ±¡¢Á¿Í²¡¢²£Á§°ô¡¢ ¡¢ ¡£(ÌîÒÇÆ÷)
£¨2£©È¡10.00mL´ý²âÒº£¬Óà Á¿È¡×¢Èë׶ÐÎÆ¿ÖС£(ÌîÒÇÆ÷)
£¨3£©ÓÃ0.2010mol/L±ê×¼ÑÎËáÈÜÒºµÎ¶¨´ý²âÉÕ¼îÈÜÒº£¬µÎ¶¨Ê±×óÊÖ £¬ÓÒÊÖ £¬Á½ÑÛ×¢ÊÓ £¬Ö±µ½µÎ¶¨Öյ㡣
£¨4£©¸ù¾ÝÏÂÁвⶨÊý¾Ý£¬·ÖÎöµÃµ½ºÏÀíÊý¾Ý£¬¼ÆËã´ý²âÉÕ¼îÈÜÒºµÄŨ¶È£º ¡£
£¨5£©¸ù¾ÝÉÏÊö²â¶¨Êý¾Ý£¬·ÖÎöµÃµ½ºÏÀíÊý¾Ý£¬¼ÆËãÉÕ¼îµÄ´¿¶È ¡£
£¨1£©×¼È·³ÆÈ¡ÉÕ¼îÑùÆ·4.1g£¬½«ÑùÆ·Åä³É250mLµÄ´ý²âÒº£¬ÐèÒªµÄÒÇÆ÷ÓÐСÉÕ±¡¢Á¿Í²¡¢²£Á§°ô¡¢ ¡¢ ¡£(ÌîÒÇÆ÷)
£¨2£©È¡10.00mL´ý²âÒº£¬Óà Á¿È¡×¢Èë׶ÐÎÆ¿ÖС£(ÌîÒÇÆ÷)
£¨3£©ÓÃ0.2010mol/L±ê×¼ÑÎËáÈÜÒºµÎ¶¨´ý²âÉÕ¼îÈÜÒº£¬µÎ¶¨Ê±×óÊÖ £¬ÓÒÊÖ £¬Á½ÑÛ×¢ÊÓ £¬Ö±µ½µÎ¶¨Öյ㡣
£¨4£©¸ù¾ÝÏÂÁвⶨÊý¾Ý£¬·ÖÎöµÃµ½ºÏÀíÊý¾Ý£¬¼ÆËã´ý²âÉÕ¼îÈÜÒºµÄŨ¶È£º ¡£
£¨5£©¸ù¾ÝÉÏÊö²â¶¨Êý¾Ý£¬·ÖÎöµÃµ½ºÏÀíÊý¾Ý£¬¼ÆËãÉÕ¼îµÄ´¿¶È ¡£
£¨1£©250mLÈÝÁ¿Æ¿£¬½ºÍ·µÎ¹Ü¡¢ÌìƽµÈ
£¨2£©¿ÉÓüîʽµÎ¶¨¹ÜÀ´Á¿È¡£¬Ò²¿ÉʹÓÃÒÆÒº¹ÜÀ´Á¿È¡
£¨3£©µÎ¶¨¹ý³ÌÖУ¬µÎ¶¨Ê±×óÊÖÐýתËáʽµÎ¶¨¹ÜµÄ²£Á§»îÈû£¬ÓÒÊÖ²»Í£µØÒ¡¶¯×¶ÐÎÆ¿£¬Á½ÑÛ×¢ÊÓ׶ÐÎÆ¿ÖÐÈÜÒºÑÕÉ«µÄ±ä»¯£¬Ö±µ½µÎ¶¨Öյ㡣
£¨4£©V(NaOH)="10.00mL " V(HCl)=[(20.40mL-0.50mL)+(24.10mL-4.00)]/2=20.00mL
¸ù¾Ý£ºc(NaOH)V(NaOH)="c(HCl)V(HCl) " Ôò£ºc(NaOH)=0.4020mol/L
£¨5£©ÑùÆ·ÖÐm(NaOH)=0.4020mol/L¡Á0.250L¡Á40g/mol=4.02g
ÔòÉÕ¼îµÄ´¿¶ÈΪ£º4.02g/4.1g¡Á100%=98%
ÂÔ
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿