問題
| CuSO4の溶解度： |
２０℃ |
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ｇ |
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６０℃ |
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ｇ |
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CuSO4・5H2O＝２５０(g/mol)
CuSO4＝１６０(g/mol)
６０℃の飽和溶液２００ｇを
２０℃まで冷却するとき，
CuSO4・5H2Oがｙ(ｇ)析出するとすると，
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２００× |
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－ｙ× |
—————— |
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| 溶質 |
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１００＋４０ |
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２５０ |
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| ——— |
＝ |
———————————————————————— |
| 溶液 |
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２００－ |
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| ＝ |
——————————— |
＝ |
—————— |
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１００＋２０ |
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１６ |
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| (２００× |
—————— |
－ |
———— |
ｙ |
)＝２００－ |
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２５ |
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２４００－ |
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| —————— |
＝ |
————————————— |
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| ７ |
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７ |
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９６－ |
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| ＝ |
—————————— |
ｙ＝ |
————— |
ｙ |
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２５ |
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２５ |
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２５０００ |
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| ｙ＝ |
—————— |
× |
—————— |
＝ |
—————— |
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７ |
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＝５０.３・・・≒(g)
お疲れ様でした。「採点」ボタンを押して採点してください。
