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10 Nov 2019
Consider the following salts: NH_4Cl NaCHO_2 [or NaHCOO] KCN LiNO_3 (CH_3NH_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 Cr^-1] b. Identify each salt solution produced as acidic, neutral or basic. Calculate the pH of a buffer that is 0.355 M CH_3COOH and 0.288 M NaCH_3COO. Calculate the pH of a buffer that is 0.321 NH_3 AND 0.123M NH_4CL What is the pH of a buffer produced by mixing 150 mL of 0.421 NH_3 and 175 mL of 0.157 NH_4CI? Be sure to first find the concentration of each compound in the mixed solution (M_1V_1 = M_2V_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_1V_1 = M_2V_2 remember V_2, total volume), then apply equilibrium.
Consider the following salts: NH_4Cl NaCHO_2 [or NaHCOO] KCN LiNO_3 (CH_3NH_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 Cr^-1] b. Identify each salt solution produced as acidic, neutral or basic. Calculate the pH of a buffer that is 0.355 M CH_3COOH and 0.288 M NaCH_3COO. Calculate the pH of a buffer that is 0.321 NH_3 AND 0.123M NH_4CL What is the pH of a buffer produced by mixing 150 mL of 0.421 NH_3 and 175 mL of 0.157 NH_4CI? Be sure to first find the concentration of each compound in the mixed solution (M_1V_1 = M_2V_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_1V_1 = M_2V_2 remember V_2, total volume), then apply equilibrium.
Elin HesselLv2
18 Mar 2019