Question

ij²¿·Ö±äÖʵÄNaOHÊÔ¼Á¾­´¦ÀíºóÖ»º¬ÓÐNaOHºÍNa₂CO₃Á½ÖÖÎïÖÊ¡£Ð¡Ã÷ͬѧ´ÓÖоùÔÈÈ¡³ö9.3gÑùÆ·ÓÃ19.9gË®Èܽâºó£¬ÔÙÏòÆäÖлºÂýµÎ¼Ó10%µÄÏ¡ÑÎËáÖÁÇ¡ºÃÍêÈ«·´Ó¦Ê±£¬ÓÃȥϡÑÎËá73g£¬¾­²â¶¨¹²·Å³öÆøÌå2.2g¡£

£¨1£©ÏòÑùÆ·ÖмÓÈëÏ¡ÑÎËáÖÁÇ¡ºÃÍêÈ«·´Ó¦Ê±£¬·¢ÉúµÄÁ½¸ö·´Ó¦¿ÉÓû¯Ñ§·½³Ìʽ±íʾΪ£º

_______________________________________£¬_______________________________________£»

9.3gÑùÆ·ÖУ¬º¬Na₂CO₃µÄÖÊÁ¿Îª_____________g£¬º¬NaOHµÄÖÊÁ¿Îª_____________g¡£

£¨2£©Í¨¹ý¼ÆËãÈ·¶¨Ô­NaOHÊÔ¼ÁµÄ±äÖʳ̶ȡ££¨ÓÃÖÊÁ¿°Ù·ÖÊý±íʾ£©

£¨3£©ÉÏÊöÇ¡ºÃÍêÈ«·´Ó¦ºóµÄÈÜÒºÖУ¬ÈÜÖʵÄÖÊÁ¿·ÖÊýÊǶàÉÙ£¿£¨ÓðٷÖÊý±íʾ£¬±£ÁôһλСÊý£©

 

Answer 1

¡¾´ð°¸¡¿

£¨1£©NaOH+HCl=NaCl+H₂O£¨1·Ö£©£»£¨2£©Na₂CO₃+2HCl=2NaCl+H₂O+CO₂¡ü£¨1·Ö£©

5.3£¨1·Ö£© 4£¨1·Ö£©

£¨2£©Éè±äÖÊÉú³É5.3g̼ËáÄƵÄÇâÑõ»¯ÄÆÖÊÁ¿Îªx

2NaOH+CO₂=Na₂CO₃+H₂O

80          106

x           5.3g

x=4g£¨1·Ö£©

ÔòÔ­ÇâÑõ»¯ÄÆÊÔ¼ÁµÄ±äÖʳ̶ÈΪ=¡­¡­=50%£¨1·Ö£©

£¨3£©Éè9.3gÑùÆ·ÓëÏ¡ÑÎËá·´Ó¦ºó¹²Éú³ÉÂÈ»¯ÄƵÄÖÊÁ¿Îªy

ÓÉ£¨1£©Öз´Ó¦·½³Ìʽ¿ÉÖªÉú³ÉµÄÂÈ»¯ÄÆÓëËùÓÃÑÎËáµÄ¹ØϵΪ

HCl¡ª¡ªNaCl

36.5   58.5

73g¡Á10%    y

y=11.7g

»ò£º¸ù¾ÝÖÊÁ¿Êغ㶨ÂÉ£¬·´Ó¦Ç°ºóµÄÄÆÔªËØÖÊÁ¿²»±ä£¬ÔòÓÐÏÂÁйØϵ

NaOH¡ª¡ªNaCl

40     58.5

8g     y

y=11.7g

·´Ó¦ºóÈÜÒºµÄÖÊÁ¿Îª9.3g+19.9g+73g-2.2g=100g

£¨11.7g¡¢100gËã¶ÔÒ»¸ö»òÁ½¸ö¾ù¸ø1·Ö£©

·´Ó¦ºóµÄÈÜÒºµÄÈÜÖÊÖÊÁ¿·ÖÊý=¡­¡­=11.7%£¨1·Ö£©

´ð£º·´Ó¦ºóÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý11.7%¡£

¡¾½âÎö¡¿ÂÔ