Calculate the concentration of sodium acetate needed to produce a pH of5.0 in a solution of acetic acid(0.1 mol L-1) at 25℃. pK for aceticacid is 4.75 at 25℃.
Calculate the silver ion concentration in a solution prepared by shaking solid Ag2S with saturated H2S (0.10mol·dm-3) in 0.15mol·dm-3H3O+until equilibrium is established.
A solution containing Mg 3.00μg/ml was determined by AAS. The absorbance was 0.224. Calculate the characteristic concentration of magnesium (Mg) [μg/(ml·1%)].
A certain reaction, A+B → C, is first order with respect to each reactant, with k = 5.0 × 10-3M-1s-1. Calculate the concentration of A remaining after 100 s if the initial concentration of A was 0. 100 M and that of B was 6.00 M. State any approximation made in obtaining your result.
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