Question

18£®ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©

• A£® ÓÃÇâÆø»¹Ô­10gÑõ»¯Í­£¬¼ÓÈÈƬ¿Ìºó£¬ÀäÈ´³ÆµÃÊ£Óà¹ÌÌåÖÊÁ¿Îª8.4g£¬Ôò²Î¼Ó·´Ó¦µÄÑõ»¯Í­µÄÖÊÁ¿ÊÇ8g
• B£® ½«5gijÎïÖÊÍêÈ«ÈܽâÓÚ95gË®ÖУ¬ËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊýÒ»¶¨ÊÇ5%
• C£® ½«3g̼ºÍ6gÑõÆøÔÚÃܱÕÈÝÆ÷Öеãȼ£¬³ä·Ö·´Ó¦ºó£¬ÈÝÆ÷ÖеÄÆøÌåΪ´¿¾»Îï
• D£® ½«Ò»¶¨Á¿µÄÇâÑõ»¯ÄƺÍÇâÑõ»¯¸ÆµÄ»ìºÏÎïÈÜÓÚ×ãÁ¿Ë®ÖУ¬ÔÙÏòÈÜÒºÖмÓÈë¹ýÁ¿µÄ̼ËáÄÆÈÜÒº£¬³ä·Ö·´Ó¦ºó£¬Éú³ÉµÄ³ÁµíÖÊÁ¿ÓëÔ­»ìºÏÎïµÄÖÊÁ¿ÏàµÈ£¬ÔòÔ­»ìºÏÎïÖÐÇâÑõ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ26%

Answer 1

·ÖÎö A¡¢¼ÓÈÈÌõ¼þÏ£¬Ñõ»¯Í­ºÍÇâÆø·´Ó¦Éú³ÉÍ­ºÍË®£»
B¡¢½«5gijÎïÖÊÍêÈ«ÈܽâÓÚ95gË®ÖУ¬ËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý²»Ò»¶¨ÊÇ5%£»
C¡¢Ì¼ºÍÑõÆø¿ÉÄÜÉú³É¶þÑõ»¯Ì¼£¬Ò²¿ÉÄÜÉú³ÉÒ»Ñõ»¯Ì¼£»
D¡¢Ì¼ËáÄƺÍÇâÑõ»¯¸Æ·´Ó¦Éú³É̼Ëá¸Æ³ÁµíºÍÇâÑõ»¯ÄÆ£®

½â´ð ½â£ºA¡¢Éè²Î¼Ó·´Ó¦µÄÑõ»¯Í­ÖÊÁ¿Îªx£¬
CuO+H₂$\frac{\underline{\;\;¡÷\;\;}}{\;}$Cu+H₂O£¬
80              64
x               $\frac{64x}{80}$
¸ù¾ÝÌâÒâÓУº10g-x+$\frac{64x}{80}$=8.4g£¬
x=8g£¬¸ÃÑ¡Ïî˵·¨ÕýÈ·£»
B¡¢½«5gijÎïÖÊÍêÈ«ÈܽâÓÚ95gË®ÖУ¬ËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý²»Ò»¶¨ÊÇ5%£¬ÀýÈç°Ñ5gÎåË®ÁòËáÍ­ÈܽâÔÚ95gË®ÖУ¬ËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊýСÓÚ5%£¬¸ÃÑ¡Ïî˵·¨²»ÕýÈ·£»
C¡¢Ì¼ÔÚÑõÆøÖÐȼÉÕÉú³É¶þÑõ»¯Ì¼¡¢Ò»Ñõ»¯Ì¼µÄ»¯Ñ§·½³Ìʽ¼°ÆäÖÊÁ¿¹ØϵΪ£º
C+O₂$\frac{\underline{\;µãȼ\;}}{\;}$CO₂£¬2C+O₂$\frac{\underline{\;µãȼ\;}}{\;}$2CO£¬
12 32        44     24   32         56
ÓÉÒÔÉÏÖÊÁ¿¹Øϵ¿ÉÖª£¬Ì¼ºÍÑõÆø·´Ó¦Éú³É¶þÑõ»¯Ì¼Ê±£¬Ì¼ºÍÑõÆøµÄÖÊÁ¿±ÈÊÇ3£º8£¬Ì¼ºÍÑõÆø·´Ó¦Éú³ÉÒ»Ñõ»¯Ì¼Ê±£¬Ì¼ºÍÑõÆøµÄÖÊÁ¿±ÈÊÇ3£º4£¬½«3g̼ºÍ6gÑõÆøÔÚÃܱÕÈÝÆ÷Öеãȼʱ£¬Éú³ÉÒ»Ñõ»¯Ì¼ºÍ¶þÑõ»¯Ì¼µÄ»ìºÏÎ¸ÃÑ¡Ïî˵·¨²»ÕýÈ·£»
D¡¢Éè»ìºÏÎïÖÊÁ¿Îª1g£¬ÇâÑõ»¯¸ÆµÄÖÊÁ¿Îªx£¬
Na₂CO₃+Ca£¨OH£©₂¨TCaCO₃¡ý+2NaOH£¬
                 74              100
                 x                $\frac{100x}{74}$
¸ù¾ÝÌâÒâÓУº$\frac{100x}{74}$=1g£¬
x=0.74g£¬
ÔòÔ­»ìºÏÎïÖÐÇâÑõ»¯ÄƵÄÖÊÁ¿·ÖÊýΪ£º$\frac{1g-0.74g}{1g}$¡Á100%=26%£¬¸ÃÑ¡Ïî˵·¨ÕýÈ·£®
¹ÊÑ¡£ºAD£®

µãÆÀ ÉèDÖлìºÏÎïÖÊÁ¿Ê±£¬Ôõô¼ÆËã·½±ã¾ÍÔõôÉ裬Óë¼ÆËã½á¹ûÎ޹أ¬ÕâÊÇÒòΪÇóµÄÊÇÖÊÁ¿·ÖÊý£¬Òª×¢ÒâÀí½â£®