28 What are the ionic strength and pH of the buffer solution consisting of 0.1 M CH3COOH (pKa = 4.76) and 0.1 M CH3COONa? (A) 0.1 M, pH 4.76 (B) 0.2 M, pH 5.76 (C) 0.3 M, pH 3.76 (D) 0.4 M, pH 2.76 (E) 0.6 M, pH 6.76

28 What are the ionic strength and pH of the buffer solution consisting of 0.1 M CH₃COOH (pK_a = 4.76) and 0.1 M CH3COONa?
(A) 0.1 M, pH 4.76
(B) 0.2 M, pH 5.76
(C) 0.3 M, pH 3.76
(D) 0.4 M, pH 2.76
(E) 0.6 M, pH 6.76

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統計： A(1), B(0), C(0), D(0), E(0) #3423919

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7Which statement about H-atom is not true? (A) Spherical polar coordinates are the natural choice for H-atom Schrödinger equation because the potential term is spherically symmetric. (B) H-atom Schrödinger equation can be solved by separation of variables where the radial part Rni(r) and the angular partare linked through I(I+1) while Θ(θ) andΦ (Φ) are linked through m². (C) The operator for the z-component of angular momentum has the simplest form in spherical polar coordinates as opposed to the x and y-components. (D) The rules for allowed angular momentum magnitudes and orientations are shared by the rigid rotor and the H-atom. (E) By changing the variable sinθ into x, the Θ differential equation can be recognized as being the associated Legendre equation.

28 What are the ionic strength and pH of the buffer solution consisting of 0.1 M CH₃COOH (pK_a = 4.76) and 0.1 M CH3COONa?
(A) 0.1 M, pH 4.76
(B) 0.2 M, pH 5.76
(C) 0.3 M, pH 3.76
(D) 0.4 M, pH 2.76
(E) 0.6 M, pH 6.76

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