ÌâÄ¿ÄÚÈÝ
19£®£¨1£©ÂËÒºAÔÚ100¡æ¾Õô·¢Å¨ËõÖÁÌå»ýΪ30.0mL£¬ÀäÈ´ÖÁ10¡æºó£¬Îö³öNa2S2O3•5H2O¾§Ì壮ÈôÒª¼ÆËãËùµÃµ½µÄNa2S2O3•5H2OµÄÖÊÁ¿£¬ÄãÈÏΪABD£¨ÌîдѡÏî×Öĸ£©A¡¢»¹ÐèÒªÌṩ10¡æÊ±Na2S2O3µÄÈܽâ¶ÈΪ£¨60.0g£©
B¡¢»¹ÐèÒªÌṩ100¡æÊ±ÈÜÒºµÄÃܶȣ¨1.12g•cm-3£©
C¡¢»¹ÐèÒªÌṩ½á¾§ºóÊ£ÓàÈÜÒºµÄÌå»ý£¨10.0mL£©
D¡¢»¹ÐèÒªÌṩNa2SO3ÓëS·ÛÍêÈ«·´Ó¦ºóÉú³ÉµÄNa2S2O3µÄÖÊÁ¿£¨19.1g£©
£¨2£©¸ù¾ÝµÚ£¨1£©Ð¡ÌâÄãµÄÑ¡Ôñ£¨Ñ¡ÓÃÆäÊý¾Ý£©£¬¼ÆËãÀäÈ´ÖÁ10¡æºó£¬Îö³öNa2S2O3•5H2O¾§ÌåµÄÖÊÁ¿Îª24.8g£®
·ÖÎö ¸ù¾ÝÒÑÓеÄ֪ʶ½øÐзÖÎö½â´ð£¬Òª¼ÆËãËùµÃµ½Na2S2O3•5H2OµÄÖÊÁ¿£¬ÐèÒªÖªµÀ10¡æÊ±Na2S2O3µÄÈܽâ¶È£¬ÒÔ¼°100¡æÊ±ÈÜÒºµÄÃܶȺÍNa2SO3ÓëS·ÛÍêÈ«·´Ó¦ºóÉú³ÉµÄNa2S2O3µÄÖÊÁ¿£¬¾Ý´Ë½â´ð¼´¿É£®
½â´ð ½â£º£¨1£©ÐèÒªÖªµÀ10¡æÊ±Na2S2O3µÄÈܽâ¶È£¬ÒÔ¼°100¡æÊ±ÈÜÒºµÄÃܶȺÍNa2SO3ÓëS·ÛÍêÈ«·´Ó¦ºóÉú³ÉµÄNa2S2O3µÄÖÊÁ¿£¬¹ÊÌABD£»
£¨2£©ÈÜÒºÖÐË®µÄÖÊÁ¿=30£®0mL¡Á1£®12g/mL-19.1g=14.5g£¬ÉèÎö³öµÄNa2S2O3•5H2OµÄÖÊÁ¿Îªx£¬Ôò£º$\frac{60.0g}{100g}=\frac{19.1g-\frac{158g/mol}{248g/mol}¡Áx}{14.5g-\frac{90g/mol}{248g/mol}¡Áx}$
½âµÃx=24.8g£¬
¹ÊÌ24.8g£®
µãÆÀ ±¾Ì⿼²éµÄÊǽᾧµÄ֪ʶ£¬Íê³É´ËÌ⣬ÐèÒªÒÀ¾ÝÈܽâ¶ÈµÄ֪ʶ½øÐУ¬ÄѶȽϴó£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
9£®Ôì³ÉËáÓêµÄÖ÷񻮿ÌåµÄ£¨¡¡¡¡£©
| A£® | ¶þÑõ»¯µªºÍ¶þÑõ»¯Áò | B£® | Ò»Ñõ»¯Ì¼ºÍ¶þÑõ»¯Ì¼ | ||
| C£® | ¶þÑõ»¯Ì¼ºÍ¶þÑõ»¯µª | D£® | ¶þÑõ»¯Ì¼ºÍ¶þÑõ»¯Áò |
10£®Ä³Ì¼Ëá¸ÆºÍÉúʯ»Ò×é³ÉµÄÑùÆ·£¬²âµÃÆäÖÐÌ¼ÔªËØµÄº¬Á¿Îª6%£¬¾¹ý³ä·Ö¸ßÎÂìÑÉÕºóµÃµ½´¿¾»µÄÉúʯ»Ò£¬ÔòÑùÆ·ìÑÉÕºóÐÂÉú³ÉµÄÉúʯ»ÒÕ¼×îÖÕËùµÃµÄ´¿¾»Éúʯ»ÒµÄÖÊÁ¿·ÖÊýԼΪ£¨¡¡¡¡£©
| A£® | 28% | B£® | 35.9% | C£® | 50% | D£® | 64.1% |
4£®ÏÂÁи÷×éÈÜÒº£¬±ØÐëÁí¼ÓÊÔ¼Á²ÅÄܼø±ð³öÀ´µÄÊÇ£¨¡¡¡¡£©
| A£® | FeCl3 NaOH HCl | B£® | BaCl2 Na2CO3 HCl | ||
| C£® | HCl Na2CO3 KNO3 | D£® | CuSO4 BaCl2 HNO3 |
11£®ÏÂÁÐ×ö·¨²»·ûºÏÊÂʵµÄÊÇ£¨¡¡¡¡£©
| A£® | ÆôÓÃÏÐÖõÄÕÓÆø³ØÇ°ÏȽøÐлð°ÑʵÑé | |
| B£® | Óð״×Äܹ»³ýË®ºøÖеÄË®¹¸ | |
| C£® | ¼ÒÓõçÆ÷×Å»ð£¬Ó¦ÏÈÇжϵçÔ´ÔÙÓøɷÛÃð»ðÆ÷Ãð»ð | |
| D£® | ¡±Õæ½ð²»Å»ðÁ¶¡°ËµÃ÷½ðµÄ»¯Ñ§ÐÔÖʲ»»îÆÃ |