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)
水２００ｇに硫酸銅の結晶を入れて６０℃の飽和溶液をつくる．
６０℃の水２００ｇにCuSO4・5H2Oの結晶がｘｇ溶けるとすると，
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ｘ× |
—————— |
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| 溶質 |
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| ——— |
＝ |
—————————————— |
| 溶液 |
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２００＋ |
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２ |
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| ＝ |
———————————— |
＝ |
—— |
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１００＋ |
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７ |
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１６ |
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| × |
——— |
×ｘ＝(ｘ＋２００)＝２ｘ＋４００ |
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２５ |
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| ７×１６－ |
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６２ |
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| ——————————————— |
ｘ＝ |
——— |
ｘ＝ |
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| ２５ |
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２５ |
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×４×１００ |
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１００００ |
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| ｘ＝ |
———————————————— |
＝ |
——————— |
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６２ |
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６２ |
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＝１６１．・・・≒×１０２ｇ溶ける．
お疲れ様でした。「採点」ボタンを押して採点してください。
