16. Calculate the freezing point of 2.0 g Al(NO3)3 in 30. g H2O. (Assume complete dissociation and ideal solution.) (Note: Kf for water = 1.86 °C/m and Al(NO3)3 = 213 g mol⁻¹) (A) -0.059 °C (B) 2.33 °C (C) -2.95 °C (D) -1.75°C (E) -2.33 °C

16. Calculate the freezing point of 2.0 g Al(NO₃)₃ in 30. g H₂O. (Assume complete dissociation and ideal solution.) (Note: Kf for water = 1.86 °C/m and Al(NO₃)₃ = 213 g mol⁻¹)
(A) -0.059 °C
(B) 2.33 °C
(C) -2.95 °C
(D) -1.75°C
(E) -2.33 °C

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統計： A(1), B(0), C(0), D(0), E(2) #3252558

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B1 · 2025/10/21

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1. 題目解析這道題目要求計算在30...

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4. A strip of copper is placed in a 1 M solution of copper nitrate, and a strip of silver is placed in a 1 M solution of silver nitrate. The two metal strips are connected to a voltmeter by wires, and a salt bridge connects the solutions. The following standard reduction potentials apply: Ag+(aq) + e- → Ag(s) E° = +0.80 V Cu2+(aq) + 2e- → Cu(s) E° = +0.34 V When the voltmeter is removed and the two electrodes are connected by a wire, which of the following does .not. take place? (A) Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell. (B) Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell. (C) The silver electrode increases in mass as the cell operates. (D) Electrons flow in the external circuit from the copper electrode to the silver electrode. (E) There is a net general movement of silver ions through the salt bridge to the copper half-cell.

16. Calculate the freezing point of 2.0 g Al(NO₃)₃ in 30. g H₂O. (Assume complete dissociation and ideal solution.) (Note: Kf for water = 1.86 °C/m and Al(NO₃)₃ = 213 g mol⁻¹)
(A) -0.059 °C
(B) 2.33 °C
(C) -2.95 °C
(D) -1.75°C
(E) -2.33 °C

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