【毎日一問】理論基礎 2019.5.30

2019-05-30View Original

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選択問題：等体積の0.08mol•dm-3 KI溶液と0.1mol•dm-3 AgNO3溶液を混合してゾル系を得た。それぞれに次のものを加える：(1) MgSO4； (2)CaCl2； (3)Na2SO4の場合、その凝集能力の大きさは：（） A.(1)＞(2)＞(3) B.(2)＞(1)＞(3) C.(3)＞(1)＞(2) D.(3)＞(2)＞(1) 正解：C AgNO3溶液が過剰な状態では、AgIのコロイド核が優先的に銀イオンを吸着し、コロイド粒子は正電荷を帯びる。陰イオンの価数が高いほど凝集能力は強くなる。MgSO4の陽イオン価数はNa2SO4よりも高いため、MgSO4の凝集能力が最も強い。ヒント：答えの返信は表示されます

Reply #22019-05-30

C.(3)＞(1)＞(2)

Reply #32019-05-30

C.(3)＞(1)＞(2)

Reply #42019-05-30

B.(2)＞(1)＞(3)

Reply #52019-05-30

B.(2)＞(1)＞(3)

Reply #62019-05-30

C.(3)＞(1)＞(2)

Reply #72019-05-30

C. (3)＞(1)＞(2)

Reply #82019-05-30

C.(3)＞(1)＞(2)

Reply #92019-05-30

C.(3)＞(1)＞(2)

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【毎日一問】理論基礎 2019.5.30

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