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à¤Ã×èͧÁ×ͧ͢ËÑÇ¢éÍ | ¤é¹ËÒã¹ËÑÇ¢é͹Õé |
#1
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⨷Âìà¤ÁÕàÃ×èͧÊÒÃÅÐÅÒ ªèÇÂ˹èͤÃѺ
µéͧãªéÊÒÃÅÐÅÒ NaOH 0.5 mol/L ¡Õè $cm^3 ¼ÊÁ¡ÑºÊÒÃÅÐÅÒ NaOH 0.2 mol/L ¡Õè $cm^3 ¨Ö§¨Ðä´éÊÒÃÅÐÅÒ NaOH 0.3 mol/L 400 $cm^3
§§ÁÒ¡æ¤Ñº |
#2
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ãªéµÑÇ 0.5 mol = x ÅÔµÃ
ãªéµÑÇ 0.2 mol = 0.4 - x ÅԵà mol NaOH ¡è͹¼ÊÁ = ËÅѧ¼ÊÁ 0.5 (x) + 0.2 (0.4 - x) = 0.3 (0.4) 0.5 x + 0.08 - 0.2 x = 0.12 0.3 x = 0.04 x = 0.133... ÅԵà = 133.33 ź«Á |
#3
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¢Íº¤Ø³ÁÒ¡æ ¤Ñº
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