Question

8£®Ä³Ñо¿Ñ§Ï°Ð¡×éÓû²â¶¨Ê¯»ÒʯÖÐ̼Ëá¸ÆµÄÖÊÁ¿·ÖÊý£¬²ÉÓõķ½·¨ÈçÏ£ºÈ¡¸Ãʯ»ÒʯÑùÆ·20g£¬°Ñ80gÏ¡ÑÎËá·ÖËĴμÓÈ룬ʵÑé¹ý³ÌËùµÃÊý¾ÝÈç±í¸ñ£¨ÒÑ֪ʯ»ÒʯÑùÆ·Öк¬ÓеĶþÑõ»¯¹èµÈÔÓÖʲ»ÈÜÓÚË®£¬²»ÓëÏ¡ÑÎËá·´Ó¦£©£®

ʵÑé´ÎÊý	¼ÓÈëÏ¡ÑÎËáµÄÖÊÁ¿/g	Ê£Óà¹ÌÌåµÄÖÊÁ¿/g
1	20	15
2	20	10
3	20	6.8
4	20	n

¸ù¾ÝʵÑéÊý¾Ý¼ÆË㣺
£¨1£©±íÖÐnµÄÊýֵΪ6.8£®
£¨2£©ÑùÆ·ÖÐ̼Ëá¸ÆµÄÖÊÁ¿·ÖÊýÊÇ66%£®
£¨3£©ÍêÈ«·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼µÄÖÊÁ¿£®£¨¼ÆËã½á¹û±£ÁôһλСÊý£©

Answer 1

·ÖÎö £¨1£©¸ù¾Ýͼ±íÊý¾Ý¿ÉÖª£¬µÚ1¡¢2´Î·´Ó¦ºó¹ÌÌåÎïÖʼõÉÙµÄÖÊÁ¿¶¼Îª5g£¬¶øµÚ3´Î·´Ó¦ºó¹ÌÌåÎïÖʼõÉÙµÄÖÊÁ¿Îª3.2g£¬ËµÃ÷´Ëʱ̼Ëá¸ÆÒÑ·´Ó¦Í꣬²»ÔÙ²úÉúÆøÌ壬¹Ê±íÖÐnµÄÊýֵΪ6.8£®
£¨2£©¸ù¾Ýͼ±íÊý¾Ý¿ÉÖª£¬ÍêÈ«·´Ó¦ºó£¬Ê£Óà¹ÌÌåÎïÖʵÄÖÊÁ¿Îª6.8g£¬Ê¯»ÒʯÑùÆ·µÄÖÊÁ¿¼õȥʣÓà¹ÌÌåÎïÖʵÄÖÊÁ¿¾ÍÊÇÑùÆ·ÖÐ̼Ëá¸ÆµÄÖÊÁ¿£¬È»ºó¸ù¾ÝÖÊÁ¿·ÖÊý¹«Ê½¼ÆËã¼´¿É£®
£¨3£©¸ù¾Ý̼Ëá¸ÆÓëÑÎËá·´Ó¦µÄ»¯Ñ§·½³ÌʽºÍ̼Ëá¸ÆµÄÖÊÁ¿£¬¼´¿É¼ÆËã³öÍêÈ«·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼µÄÖÊÁ¿£®

½â´ð ½â£º£¨1£©¸ù¾Ýͼ±íÊý¾Ý¿ÉÖª£¬µÚ1¡¢2´Î·´Ó¦ºó¹ÌÌåÎïÖʼõÉÙµÄÖÊÁ¿¶¼Îª5g£¬¶øµÚ3´Î·´Ó¦ºó¹ÌÌåÎïÖʼõÉÙµÄÖÊÁ¿Îª3.2g£¬ËµÃ÷´Ëʱ̼Ëá¸ÆÒÑ·´Ó¦Í꣬²»ÔÙ²úÉúÆøÌ壬¹Ê±íÖÐnµÄÊýֵΪ6.8£®
¹Ê´ð°¸Îª£º6.8£®
£¨2£©ÑùÆ·ÖÐ̼Ëá¸ÆµÄÖÊÁ¿·ÖÊý=$\frac{20g-6.8g}{20g}$¡Á100%=66%£®
¹Ê´ð°¸Îª£º66%£®
£¨3£©Ì¼Ëá¸ÆµÄ×ÜÖÊÁ¿Îª20g-6.8g=13.2g
ÉèÍêÈ«·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼µÄÖÊÁ¿Îªx£¬
CaCO₃+2HCl=CaCl₂+H₂O+CO₂¡ü
100                                    44
13.2g                                  x
$\frac{100}{13.2g}=\frac{44}{x}$
  ½âÖ®µÃ£ºx¡Ö5.8g£¬
´ð£ºÍêÈ«·´Ó¦ºóÉú³ÉµÄ¶þÑõ»¯Ì¼µÄÖÊÁ¿Îª5.8g£®

µãÆÀ ±¾ÌâÖ÷Òª¿¼²éѧÉúÀûÓû¯Ñ§·½³ÌʽºÍÈÜÖʵÄÖÊÁ¿·ÖÊý¹«Ê½½øÐмÆËãµÄÄÜÁ¦£®