Question

£¨2013?婽­ÇøÄ£Ä⣩ÓÐÌú·ÛºÍÍ­·ÛµÄ¾ùÔÈ»ìºÏÎ¼×¡¢ÒÒ¡¢±ûÈýλͬѧ·Ö±ðÈ¡¸Ã»ìºÏÎïÓëÏ¡ÁòËá·´Ó¦£¬ËùµÃÊý¾ÝÈçϱíËùʾ£º

	¼×	ÒÒ	±û
È¡ÓýðÊô»ìºÏÎïµÄÖÊÁ¿/g	10	10	20
È¡ÓÃÏ¡ÁòËáµÄÖÊÁ¿/g	100	120	100
·´Ó¦ºó¹ýÂË£¬µÃ¸ÉÔï¹ÌÌåµÄÖÊÁ¿/g	4	4	13

Çë·ÖÎöÊý¾Ý£¬»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÒÒ³ä·Ö·´Ó¦ºó×îÖյõ½µÄ4g¹ÌÌåÊÇ

Cu

£®£¨Ìѧʽ£©
£¨2£©¼ÆËã±ûͬѧËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý£®£¨Ð´³ö¼ÆËã¹ý³Ì£¬¼ÆËã½á¹û¾«È·µ½0.1%£©
£¨3£©¼×ËùµÃÈÜÒºÖк¬ÓеÄÈÜÖÊÊÇ

H₂SO₄¡¢FeSO₄

£®£¨Ìѧʽ£©ÀíÓÉÊÇ

¼×¡¢±ûÁ½×éÊý¾Ý¶Ô±È¿ÉÖª£º¼×ÖÐËáûÓÐÍêÈ«·´Ó¦£¬ÇÒÌúÓëÏ¡ÁòËá·´Ó¦Éú³ÉFeSO₄

£®

Answer 1

·ÖÎö£º£¨1£©±È½Ï¼×ÒÒÁ½×éÊý¾Ý¿ÉÒÔÖªµÀͬÊÇ10g½ðÊô·Ö±ðÓë100gÏ¡ÁòËá¡¢120gÏ¡ÁòËᷴӦʣÓà¹ÌÌåµÄÖÊÁ¿¶¼ÊÇ4g£¬ËùÒÔ¿ÉÒÔÅжÏ4g¹ÌÌåΪͭ£¬¿ÉÒԾݴ˽â´ð£»
£¨2£©±È½Ï±í¸ñÖеÄÊý¾Ý¿ÉÒÔÖªµÀ£¬10g½ðÊôÖк¬ÓÐÍ­µÄÖÊÁ¿Îª4g£¬ÄÇô20g½ðÊôÖк¬ÓÐÍ­µÄÖÊÁ¿Îª8g£¬¶ø±ûÖмÓÈë20g½ðÊôÓÚ100gËáÖУ¬Ê£ÓàµÄ¹ÌÌåµÄÖÊÁ¿Îª13g£¬ËùÒÔ¿ÉÒÔÅжϽðÊô»ìºÏÎïÖеÄÌúÓÐÊ£Ó࣬¿ÉÒԾݴ˽áºÏ·´Ó¦µÄ»¯Ñ§·½³Ìʽ½øÐмÆË㣻
£¨3£©¼×¡¢±ûÁ½×éÊý¾Ý¶Ô±È¿ÉÖª£º¼×ÖÐËáûÓÐÍêÈ«·´Ó¦£¬ÇÒÌúÓëÏ¡ÁòËá·´Ó¦Éú³ÉFeSO₄£¬¿ÉÒԾݴ˽â´ð£®

½â´ð£º½â£º£¨1£©±È½Ï¼×ÒÒÁ½×éÊý¾Ý¿ÉÒÔÖªµÀͬÊÇ10g½ðÊô·Ö±ðÓë100gÏ¡ÁòËá¡¢120gÏ¡ÁòËᷴӦʣÓà¹ÌÌåµÄÖÊÁ¿¶¼ÊÇ4g£¬ËùÒÔ¿ÉÒÔÅжÏ4g¹ÌÌåΪͭ£¬Æ仯ѧʽΪCu£»
£¨2£©¾­·ÖÎö¿ÉÒÔÖªµÀ·´Ó¦ÖÐÏûºÄÌúµÄÖÊÁ¿Îª20g-13g=7g
ÉèÉú³ÉÁòËáÑÇÌúµÄÖÊÁ¿Îªx£¬Éú³ÉÇâÆøµÄÖÊÁ¿Îªy
Fe+H₂SO₄=FeSO₄+H₂¡ü                            
56       152   2                          
7g       x     y

56

7g

=

152

x

=

2

y

 
½âµÃ£ºx=19g£»y=0.25g
·´Ó¦ºóÈÜÒºÖÐÁòËáÑÇÌúµÄÖÊÁ¿·ÖÊýΪ£º

19g

7g+100g-0.25g

¡Á100%=17.8%£»
´ð£º±ûͬѧËùµÃÈÜÒºÖÐÁòËáÑÇÌúµÄÖÊÁ¿·ÖÊýΪ17.8%£»
£¨3£©¼×¡¢±ûÁ½×éÊý¾Ý¶Ô±È¿ÉÖª£º¼×ÖÐËáûÓÐÍêÈ«·´Ó¦£¬ÇÒÌúÓëÏ¡ÁòËá·´Ó¦Éú³ÉFeSO₄£®ËùÒÔ·´Ó¦ºóÈÜÒºÖÐÈÜÖÊΪH₂SO₄¡¢FeSO₄£®
¹Ê´ð°¸Îª£º£¨1£©Cu£»
£¨2£©7.8%£»
£¨3£©H₂SO₄¡¢FeSO₄£»¼×¡¢±ûÁ½×éÊý¾Ý¶Ô±È¿ÉÖª£º¼×ÖÐËáûÓÐÍêÈ«·´Ó¦£¬ÇÒÌúÓëÏ¡ÁòËá·´Ó¦Éú³ÉFeSO₄£®

µãÆÀ£º±¾ÌâÖ÷Òª¿¼²éѧÉúÔËÓÃËùѧ»¯Ñ§ÖªÊ¶×ۺϷÖÎöºÍ½â¾öʵ¼ÊÎÊÌâµÄÄÜÁ¦£®Ôö¼ÓÁËѧÉú·ÖÎöÎÊÌâµÄ˼ά¿ç¶È£¬Ç¿µ÷ÁËѧÉúÕûºÏ֪ʶµÄÄÜÁ¦£®