Please answer all 8 questions for all of the points: Select the compound from ea

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Please answer all 8 questions for all of the points:

Select the compound from each pair that is more soluble in acidic solution than in pure water: CaC03 (K 5 .0 x 10-9, Kal 4.3 x 10-7, K 5 6 x 10-11) or AgCL (K = 1.2 x 10-5) PbCl2 (K 1 . 2 x 10-5) or MgF2 (K 7.1 x l0-11, Ka 3.5 x 10-4) Select one basic oxide from the following metallic and nonmetallic oxides: K 20 CO2 N2O5 CaO Select two acidic oxide from the following metallic and nonmetallic oxides: K2O CO2 N2O5 CaO Select the stronger acid in each of the following pairs: HCN (ka = 4.9 x 10-10) or HF (ka = 6 .8 x 10-4) HSO3- (Kb = 1.6 x 10-7) or HCO3- (kb = 2.1 x 10-4) HNO2 (pK = 3.35) or HCIO3 (pK = - 3.00) Determine whether aqueous solutions of the following salts would be acidic, basic, or neutral: NaNO2 KNO3 AL(NO3)3 NaCN Label the acid and the base on either side of the following equation, and identify the two conjugate acid-base pairs. NH3(aq) + HF(aq) NH4+(aq) + F- (aq) Use the table of relative acidity to decide whether the following reaction favors products or reactants: HSO4- + HF H2SO4 + F - Select a buffer system from the following acid-base combinations: HNO3 and NO3- HNO2 and NO2- H2SO3 and HCO3- HCL and NaCL Which of the following buffers will be more appropriate for maintaining a pH of 7.1? Explain. H3PO4 and H2PO4- H2PO4- and HPO42- HPO42-and PO43-

Explanation / Answer

a

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