Question

20£®Ð¡Ã÷ͬѧÔÚ¼ÒÖдøÀ´ÁËÒ»¸ö·ÏÆúµÄË®ÁúÍ·£¬Æä³É·ÖΪ»ÆÍ­£¨Í­Ð¿ºÏ½ð£©£¬ÎªÁ˲ⶨ»ÆÍ­ÖÐÍ­µÄÖÊÁ¿·ÖÊý£¬ÔÚÀÏʦµÄÖ¸µ¼ÏÂ×öÁËÈçÏÂʵÑ飬ÓйØʵÑéÊý¾Ý¼Ç¼Èç±í£º

ʵÑé´ÎÊý	µÚ1´Î	µÚ2´Î	µÚ3´Î	µÚ4´Î
ËùÈ¡»ÆÍ­ÑùÆ·µÄÖÊÁ¿£¨g£©	32.0	32.0	32.0	32.0
¼ÓÈëÏ¡ÁòËáµÄÖÊÁ¿£¨g£©	40.0	80.0	120.0	160.0
·´Ó¦ºóÉÕ±­ÄÚÊ£ÓàÎïÖʵÄÖÊÁ¿£¨g£©	71.9	a	151.7	191.7

Çë·ÖÎöʵÑéÊý¾Ý£¬Íê³ÉÏÂÁмÆËã
£¨1£©µÚ2´ÎʵÑéÖÐaµÄÊýֵΪ111.8£®
£¨2£©¸Ã»ÆÍ­ÑùÆ·ÖÐÍ­µÄÖÊÁ¿·ÖÊý£¿£¨Çëд³ö¼ÆËã¹ý³Ì£¬¼ÆËã½á¹û¾«È·µ½0.1%£©
£¨3£©µÚ4´ËʵÑéÖУ¬³ä·Ö·´Ó¦ºóÈÜÒºÖÐÈÜÖʵijɷÖΪH₂SO₄¡¢ZnSO₄£¨Ð´»¯Ñ§Ê½£©£®

Answer 1

·ÖÎö µÚÒ»´Î×ÜÖÊÁ¿¼õÉÙÁË32.0g+40.0g-71.9g=0.1g£¬µÚÈý´Î¼õÉÙÁË32.0g+120.0g-151.7g=0.3g£¬ËµÒÔ¿ÉÒÔÍƵÃÿ40gÁòËá¶ÔÓ¦µÄÇâÆøµÄÖÊÁ¿Îª0.1g£¬ËùÒÔµÚ¶þ´Î¼õÉÙÓ¦¸ÃΪ0.2g£¬ËùÒԿɵÃa£®¶øµÚËÄ´ÎÖÊÁ¿ÔÚµÚÈý´ÎµÄ»ù´¡Éϲ»ÔÙ¼õÉÙ£¬ËµÃ÷µÚÈý´ÎÊÇÇ¡ºÃÍêÈ«·´Ó¦£¬¸ù¾ÝÇóËã´ÎÇóËã²Î¼Ó·´Ó¦µÄпµÄÖÊÁ¿£¬½ø¶øÇóËãÑùÆ·ÖÐÍ­µÄÖÊÁ¿·ÖÊý£®

½â´ð ½â£º
µÚÒ»´Î×ÜÖÊÁ¿¼õÉÙÁË32.0g+40.0g-71.9g=0.1g£¬µÚÈý´Î¼õÉÙÁË32.0g+120.0g-1541.7g=0.3g£¬ËµÒÔ¿ÉÒÔÍƵÃÿ40gÁòËá¶ÔÓ¦µÄÇâÆøµÄÖÊÁ¿Îª0.1g£¬ËùÒÔµÚ¶þ´Î¼õÉÙÓ¦¸ÃΪ0.2g£¬ËùÒԿɵÃa=32.0g+80.0g-0.2g=111.8g
¶øµÚËÄ´ÎÖÊÁ¿ÔÚµÚÈý´ÎµÄ»ù´¡Éϲ»ÔÙ¼õÉÙ£¬ËµÃ÷µÚÈý´ÎÊÇÇ¡ºÃÍêÈ«·´Ó¦£®´ËʱÉú³ÉµÄÇâÆøΪ0.3g
Éè²Î¼Ó·´Ó¦µÄпµÄÖÊÁ¿Îªx£¬
Zn+H₂SO₄=ZnSO₄+H₂¡ü
65                         2
x                           0.3g
$\frac{65}{2}$=$\frac{x}{0.3g}$
x=9.75g
ÑùÆ·ÖÐÍ­µÄÖÊÁ¿·ÖÊýΪ$\frac{32.0g-9.75g}{32.0g}$¡Á100%¡Ö69.5%
µÚËÄ´ÎʱÁòËáÒѾ­¹ýÁ¿£¬ËùÒÔ´ËʱµÄÈÜÖÊΪʣÓàµÄÁòËáºÍÉú³ÉµÄÁòËáп£¬´Ë´¦ÒªÇóÊéд»¯Ñ§Ê½£¬Îª£ºH₂SO₄¡¢ZnSO₄£®
´ð£º£¨1£©µÚ2´ÎʵÑéÖÐaµÄÊýֵΪ 111.8£®
£¨2£©¸Ã»ÆÍ­ÑùÆ·ÖÐÍ­µÄÖÊÁ¿·ÖÊýԼΪ69.5%£®
£¨3£©µÚ4´ËʵÑéÖУ¬³ä·Ö·´Ó¦ºóÈÜÒºÖÐÈÜÖʵijɷÖΪ H₂SO₄¡¢ZnSO₄£¨Ð´»¯Ñ§Ê½£¬ÌîдÃû³Æ²»µÃ·Ö£©£®

µãÆÀ ¸ù¾Ý»¯Ñ§·½³Ìʽ¼ÆËãʱ£¬µÚÒ»ÒªÕýÈ·Êéд»¯Ñ§·½³Ìʽ£¬µÚ¶þҪʹÓÃÕýÈ·µÄÊý¾Ý£¬µÚÈý¼ÆËã¹ý³ÌÒªÍêÕû£®