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10 Nov 2019
Consider the following salts: NH_4 Cl NaCHO_2 [or NaHCOO] KCN LiNO_3 (CH_3 NH_3)Br MgCl_2 a. For each salt, identify the ions produced when each salt is placed in water and the salt completely ionizes. (Do NOT write the reaction with water). For example NaCl ionizes to form [Na^+1 and Cl^-1] b. Identify each salt solution produced as acidic, neutral or basic. Calculate the pH of a buffer that is 0.355 M CH_3 COOH and 0.288 M NaCH_3 COO. Calculate the pH of a buffer that is 0.321 NH_3 AND 0.123M NH_4 Cl. What is the pH of a buffer produced by mixing 150 mL of 0.421 NH_3 and 175 mL of 0.157 NH_4 Cl? Be sure to first find the concentration of each compound in the mixed solution (M_1 V_1 = M_2 V_2 where V_2 equals the total volume), then apply equilibrium. What is the pH of a buffer produced by mixing 275 mL of 0.277 M HCOOH AND 300 mL of 0.203 M KCOOH? Be sure to first find the concentration of each compound in the mixed solution (M_1 V_1 = M_2 V_2 remember V_2 = total volume), then apply equilibrium.
Consider the following salts: NH_4 Cl NaCHO_2 [or NaHCOO] KCN LiNO_3 (CH_3 NH_3)Br MgCl_2 a. For each salt, identify the ions produced when each salt is placed in water and the salt completely ionizes. (Do NOT write the reaction with water). For example NaCl ionizes to form [Na^+1 and Cl^-1] b. Identify each salt solution produced as acidic, neutral or basic. Calculate the pH of a buffer that is 0.355 M CH_3 COOH and 0.288 M NaCH_3 COO. Calculate the pH of a buffer that is 0.321 NH_3 AND 0.123M NH_4 Cl. What is the pH of a buffer produced by mixing 150 mL of 0.421 NH_3 and 175 mL of 0.157 NH_4 Cl? Be sure to first find the concentration of each compound in the mixed solution (M_1 V_1 = M_2 V_2 where V_2 equals the total volume), then apply equilibrium. What is the pH of a buffer produced by mixing 275 mL of 0.277 M HCOOH AND 300 mL of 0.203 M KCOOH? Be sure to first find the concentration of each compound in the mixed solution (M_1 V_1 = M_2 V_2 remember V_2 = total volume), then apply equilibrium.
Hubert KochLv2
10 Nov 2019