Question

£¨2011?ºÓ³Ø£©Ä³Í¬Ñ§ÎªÁ˲ⶨijͭÌú»ìºÏÎïÖÐÍ­µÄÖÊÁ¿·ÖÊý£¬ÏÈÈ¡ÏàͬÖÊÁ¿µÄ»ìºÏÎï·Ö±ðÖÃÓÚÈý¸öµÈÖÊÁ¿£¨100g£©µÄÉÕ±­ÖУ¬ÔÙ·Ö±ð¼ÓÈëÏ¡ÁòËá³ä·Ö·´Ó¦£¬ÓйØʵÑéÊý¾ÝÈçÏ£º

	µÚ1±­	µÚ2±­	µÚ3±­
»ìºÍÎïÖÊÁ¿	20g	20g	20g
Ï¡ÁòËáÖÊÁ¿	50g	100g	150g
·´Ó¦ºóÉÕ±­¼°ÆäÖÐÎïÖÊÖÊÁ¿	169.8g	219.6g	269.6g

Çë¼ÆË㣺£¨1£©·´Ó¦½áÊøºóµÚ¶þ¸öÉÕ±­ÖвúÉúµÄÆøÌåÊÇ

0.4

¿Ë£®
£¨2£©»ìºÏÎïÖÐÍ­µÄÖÊÁ¿·ÖÊýΪ¶àÉÙ£¿
£¨3£©ÏòʵÑéºóµÄµÚÈý±­ÈÜÒºÖмÓÈë×ãÁ¿µÄÌú·Û£¬ÍêÈ«·´Ó¦ºó¹ýÂË£¬½«ËùµÃµÄÂËÒºÅä³É10%µÄFeSO₄ÈÜÒº£¬ÐèÒªÏòÂËÒºÖмÓÈë¶àÉÙ¿ËË®£¿£¨¼ÙÉèʵÑé¹ý³ÌÖÐÈÜÒºËðʧºöÂÔ²»¼Æ£©

Answer 1

·ÖÎö£º£¨1£©ÒÀ¾ÝÖÊÁ¿Êغ㶨ÂÉ¿ÉÒÔ¼ÆËã³ö·´Ó¦Éú³ÉµÄÇâÆøÖÊÁ¿£»
£¨2£©·ÖÎö±íÖÐÊý¾Ý£¬¿ÉÖªµÚ3±­ÖнðÊôпÒÑÍêÈ«·´Ó¦£¬¸ù¾Ý·´Ó¦Ç°ºóÖÊÁ¿²îÇóµÃ·Å³öÇâÆøÖÊÁ¿£¬¸ù¾Ý·´Ó¦µÄ»¯Ñ§·½³Ìʽ£¬ÓÉÇâÆøÖÊÁ¿Çó³ö»ìºÏÎïÖÐпµÄÖÊÁ¿£¬¼´¿ÉÇóµÃ»ìºÏÎïÖÐÍ­µÄÖÊÁ¿¶ø¼ÆËã³ö»ìºÏÎïÖÐÍ­µÄÖÊÁ¿·ÖÊý£»
£¨3£©¸ù¾ÝʵÑéÊý¾Ý£¬µÚ1±­ÖÐËù¼ÓÈëµÄÏ¡ÁòËáÍêÈ«·´Ó¦£¬ÓÉ·´Ó¦·Å³öÇâÆøÖÊÁ¿¼ÆËãËù¼ÓÏ¡ÁòËáÖÐÁòËáµÄÖÊÁ¿£¬¼´¿É¼ÆËã³öËùÓÃÏ¡ÁòËáµÄÖÊÁ¿·ÖÊý£¬¼´¿ÉÒÀ¾Ý·´Ó¦·½³Ìʽ¿ÉÒÔÇó³öµÚÈý¸ö·´Ó¦¼ÓÌúºóÉú³ÉµÄÁòËáпµÄÖÊÁ¿£¬¾Ý´Ë·ÖÎö½â´ð£®

½â´ð£º½â£º£¨1£©ÒÀ¾ÝÖÊÁ¿Êغ㶨ÂÉ¿ÉÖª·´Ó¦½áÊøºóµÚ¶þ¸öÉÕ±­ÖвúÉúµÄÆøÌåÊÇ100g+100g+20g-219.6g=0.4g£»
£¨2£©¸ù¾ÝʵÑéÊý¾Ý¿ÉÖª£ºµÚ3±­·´Ó¦²úÉúµÄÇâÆøÖÊÁ¿Îª£º20g+150g+100g-269.6g=0.4g
Éè»ìºÏÎïÖÐÌúµÄÖÊÁ¿Îªx
Fe+H₂SO₄=FeSO₄+H₂¡ü
56             2
x             0.4g

56

x

=

2

0.4g

x=11.2g
»ìºÏÎïÖÐÍ­µÄÖÊÁ¿·ÖÊý=

20g-11.2g

20g

¡Á100%=44%
£¨3£©ÓÉÊý¾Ý·ÖÎö¿ÉÖªµÚÈý´ÎʵÑé¶àÓà50gÏ¡ÁòËᣬ¹ÊÈç¹û¼ÓÌúÔòÓÉ£¨2£©µÄ¼ÆËã¿ÉÖªÐè¼ÓÌúµÄÖÊÁ¿ÊÇ5.6g£¬Ôò·´Ó¦µÄÌúµÄÖÊÁ¿Îª5.6g+11.2g=16.8g
ÉèÉú³ÉµÄÁòËáÑÇÌúµÄÖÊÁ¿ÊÇy£¬ÇâÆøµÄÖÊÁ¿ÊÇz
Fe+H₂SO₄=FeSO₄+H₂¡ü
56       152   2
16.8g     y    z

56

16.8g

=

152

y

=

2

z

y=45.6g  z=0.6g
¹Ê·´Ó¦ºóËùµÃµÄÈÜÒºµÄÖÊÁ¿ÊÇ16.8g+150g-0.6g=166.2g
ÉèÅäÖóÉ10%µÄÁòËáÑÇÌúÐèÒª¼ÓË®µÄÖÊÁ¿ÊÇw

45.6g

166.2g+w

¡Á100%=10%
w=289.8g
¹Ê´ð°¸Îª£º£¨1£©0.4g£»£¨2£©»ìºÏÎïÖÐÍ­µÄÖÊÁ¿·ÖÊýΪ44%£»£¨3£©£¬ÐèÒªÏòÂËÒºÖмÓÈë289.8g£»

µãÆÀ£º¸ù¾ÝÖÊÁ¿Êغ㶨ÂÉ£¬ÓɱíÖÐʵÑéÊý¾Ý·ÖÎöÇóµÃ·´Ó¦·Å³öÇâÆøµÄÖÊÁ¿£¬ÌåÏÖʵÑéÊý¾ÝµÄ·ÖÎöÄÜÁ¦¼°½â¾öÎÊÌâµÄÄÜÁ¦£®