Question

»¯Ñ§ÐËȤС×é¶Ôij¹¤Òµ·ÏË®£¨º¬ÓÐH₂SO₄¡¢Na₂SO₄£©ÖÐH₂SO₄µÄº¬Á¿½øÐвⶨ¡£¼×¡¢ÒÒÁ½Í¬Ñ§¸÷Ìá³ö²»Í¬µÄ²â¶¨·½·¨£º

£¨1£©¼×ͬѧ£ºËá¼îÖкͷ¨

È¡60g·ÏË®ÓÚÉÕ±­ÖУ¬Öð½¥µÎÈëÈÜÖÊÖÊÁ¿·ÖÊýΪ10%µÄNaOHÈÜÒº£¨·´Ó¦µÄ»¯Ñ§·½³ÌʽΪ£ºH₂SO₄+2NaOH==Na₂SO₄+ 2H₂O£©£¬·´Ó¦¹ý³ÌÈÜÒºpH±ä»¯ÈçÓÒͼ£¬ Çó60g·ÏË®ÖÐH₂SO₄µÄÖÊÁ¿¡£

£¨2£©ÒÒͬѧ£º³Áµí·ÖÎö·¨

 ¸ÄÓÃBaCl₂ÈÜÒº´úÌæNaOHÈÜÒº²â¶¨·ÏË®ÖеÄH₂SO₄µÄº¬Á¿£¨·´Ó¦µÄ»¯Ñ§·½³ÌʽΪ£ºH₂SO₄+ BaCl₂==BaSO₄¡ý+2HCl£©£¬ÄãÈÏΪ½á¹û»á        £¨Ìî¡°Æ«¸ß¡±¡¢¡°Æ«µÍ¡±¡¢¡°²»±ä¡±£©ÀíÓÉÊÇ                                                           ¡£

 

Answer 1

¡¾´ð°¸¡¿

(1) 2.45g

£¨2£©Æ«¸ß£¨1·Ö£© BaCl₂ÈÜÒºÒ²»áÓë·ÏË®ÖеÄNa₂SO₄·´Ó¦¡££¨2·Ö£©

¡¾½âÎö¡¿£¨1£©µ±PH=7ʱ£¬ÈÜÒº³ÊÖÐÐÔ£¬ËµÃ÷Á½ÕßÇ¡ºÃÍêÈ«·´Ó¦£¬´Ëʱ¼ÓÈëµÄNaOHÈÜÒºµÄÖÊÁ¿Îª20¿Ë¡£

½â:Éè·ÏË®ÖÐÁòËáµÄÖÊÁ¿Îªx

H₂SO₄+2NaOH=Na₂SO₄+2H₂O

98              80             

x            20g¡Á10%                          

98/80=X/20g¡Á10%    £¨2·Ö£©

X=2.45g             £¨1·Ö£©

´ð£º·ÏË®ÖÐÁòËáµÄÖÊÁ¿Îª2.45g

£¨2£©Æ«¸ß£¬ÒòΪ BaCl₂ÈÜÒºÒ²»áÓë·ÏË®ÖеÄNa₂SO₄·´Ó¦¡£