Exam 1 Study Guide.docx - Exam 1 Study Guide Analytical...

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Exam 1 Study Guide: Analytical Chemistry 221 Questions - Calculate molar ion (molarity) of ethanol C 2 H 5 OH in an aqueous solution that contains 2.30 grams of ethanol (46.07 g/mol) in 3.50 L of solution. - Describe the preparation of 2.00 L of 0.108 M BaCl 2 2 H 2 O (244.3 g/mol). - Describe the preparation of 500. mL of 0.0740 M ¿ Cl ¿ solution from solid BaCl 2 2 H 2 O (244.3 g/mol). - What is the molarity of + ¿ K ¿ in a solution that contains 63.3 ppm of K 3 Fe ( CN ) 6 (329.3 g/mol)?
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- Calculate p-value for each ion in a solution that is 2.00 × 10 3 M in NaCl and 5.4 × 10 4 M in HCl - Calculate the molar concentration of + ¿ Ag ¿ in a solution that has a pAg of 6.372. - Describe the preparation of 1.500 L of 0.215 M NaOH (40 g/mol) from the concentrated commercial reagent [50.00% NaOH (w/w) sp. Gr. 1.525] - (a.) What mass of AgNO 3 (169.9 g/mol) is needed to convert 2.330 g of Na 2 CO 3 (106.0 g/mol) to Ag 2 CO 3 ? (b.) What mass of Ag 2 NO 3 (275.7 g/mol) will be formed? a) Na 2 C O 3 ( aq ) + 2 AgN O 3 ( aq ) Ag 2 C O 3 ( s ) + 2 NaN O 3 ( aq ) - How many + ¿ Na ¿ ions are contained in 4.62 g of Na 3 PO 4 ?
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- Find the number of millimoles of the indicated species: a. 64 mg of P 2 O 5 b. 12.92 g of C O 2 c. 30.0 g of NAHC O 3 - Find the number of millimoles of solute in a. 750 mL of 0.0416 M KSCN b. 250 mL of a solution that contains 4.20 ppm of CuS O 4 c. 3.50 L of 0.276 M KCl - What is the mass in milligrams of a. 0.666 mol of HN O 3 b. 300 mmol of MgO - What is the mass in grams of: a. 6.21 mol of KBr
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b. 12.8 mmol of S O 4 ¿ 2 6 H 2 O N H 4 ¿ 2 ¿ Fe ¿ - What is the mass in milligrams of solute in a. 26.0 mL of 0.150 M sucrose (342 g/mol) b. 737 mL of a solution that contains 6.38 ppm of Pb(N O 3 ¿ 2 - What is the mass in grams of solute in a. 27.0 mL of 8.75 × 10 4 M of benzoic acid (122 g/mol) b. 3.50 L of a solution that contains 21.7 ppm of Sn Cl 2 - Calculate the p-functions for each ion in a solution that is: a. 0.0100 M in NaBr b. 0.0100 M in Ba Br 2 c. 5.2 × 10 3 M HCl and 0.020 M in NaCl - Convert the following p-functions to molar concentrations a. pH=8.67 b. pOH=0.125 c. pLi= - 0.321 d. pMn= 0.0025
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- Sea water contains an average of 1.08 × 10 3 ppm of + ¿ Na ¿ and 270 ppm 2 ¿ SO 4 ¿ . Calculate: a. The molar concentration of 2 ¿ + ¿ SO 4 ¿ Na ¿ given that the average density of sea water id 1.02 g/mL b. The pNa and pS O 4 for sea water - A solution was prepared by dissolving 414 mg of CN ¿ 6 K 3 Fe ¿ (329 g/mol) in sufficient water to give 750 mL of solution. Calculate: a. The molar analytical concentration of CN ¿ 6 K 3 Fe ¿ b. The molar concentration of + ¿ K ¿ c. The molar concentration of Fe(CN 3 ¿ ¿ 6 ¿ d. The weight/volume percentage of CN ¿ 6 K 3 Fe ¿ e. pK for the solution f. CN ¿ 6 pFe ¿ for the solution
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- Describe the preparation of 750 mL of 6.00 M H 3 PO 4 from the commercial reagent that is 85% H 3 PO 4 (w/w) and has a specific gravity of 1.69. - Describe the preparation of 900 mL of 3.00 M HN O 3 from the commercial reagent that is 69% HN O 3 (w/w) and has a specific gravity of 1.42 - Describe the preparation of: a. 500 mL of 0.0650 M AgN O 3 from the solid reagent b. 1.00 L of 0.285 M HCl starting with a 6.00 M solution of the reagent c. 400mL of a solution that is 0.0825 M in + ¿ K ¿ , starting with a solid CN ¿ 6 K 4 Fe ¿ d. 2.00 L of 0.120 M
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