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Calculate the concentration in
a.
b. A
c. On analysis for total protein, a blood serum sample of
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Chemistry for Today: General, Organic, and Biochemistry
- 1. Find the number of millimoles of solute in a. 226 ?? of 0.320 ? HClO4. b. 25.0 ? of 8.05 ? 10−3 ? K2CrO4. c. 6.00 ? of an aqueous solution that contains 6.75 ??? of AgNO3. d. 537 ?? of 0.0200 ? KOH. 2. Describe the preparation of a. 5.00 ? of 0.0500 ? KMnO4 from the solid reagent. b. 4.00 ? of 0.250 ? HClO4, starting with an 8.00 ? solution of the reagent. c. 400 ?? of a solution that is 0.0250 ? in I2, starting with MgI2. d. 200 ?? of 1.00% (?/?) aqueous CuSO4 from a 0.365 ? CuSO4 solution. e. 1.50 ? of 0.215 ? NaOH from the concentrated commercial reagent [50% NaOH (w/w), ?? ?? = 1.525]. f. 1.50 ? of a solution that is 12.0 ??? in K+, starting with solid K4Fe(CN)6. 3. Exactly 75.00 ?? of a 0.3132 ? solution of Na2SO3 were treated with 150.0 ?? of 0.4025 ? HClO4 and boiled to remove the SO2 formed. a. What was the mass in grams of SO2 that was evolved? b. What was the concentration of the unreacted reagent (Na2SO3 or HClO4) after thereaction was complete?arrow_forwardA 0.8250 g of soda ash sample was dissolved in distilled H O and diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute soda ash solution needed 4.50 mL of 0.1200 M HCl to reach the phenolphthalein end point and 10.00 mL to reach the methyl orange end point. What is the %NaHCO (%w/w) present in the soda ash sample? FW NaHCO = 84.01 g/mol (Hint: Use dilution factor)arrow_forwardA standard solution of a chemical compound was prepared by diluting 10.0 mL of a 5,0 M stock solution with water to a final volume of 100.0 mL The following formula is used to calculate the concentration of the standard solution. C2= V2 C1XV1 What is the value of V2? Choose... What is the value of V ? Choose... What is the value of C,? Choose... Choose... 100.0 mL 110.0 mL 10.0 mL 5.0 M Next pagearrow_forward
- In standardization of HCl sample with 0.1 M Na2C03 standard solution if we consumed 10 ml HCl to neutralize 10 ml of 0.1 M Na2CO3 :The morality of HCL equals :Select one a. 0.2 M b. 0.05 M c. 0.1 M أخل اختياريarrow_forwardA 0.8250 g of soda ash sample was dissolved in distilled H₂O and diluted to 250-mL using a volumetric flask. This solution was labeled as dilute soda ash solution (DSAS). a. A 50.00 mL aliquot portion of the dilute soda ash solution needed 5.20 mL of 0.1200 M HCI to reach the phenolphthalein end point. About 2-3 drops of methyl orange to the same mixture and it needed 10.00 mL of 0.1200 M HCI to reach the methyl orange end point. 1. Calculate the number of millimoles of HCI needed to reach the phenolphthalein end point. 2. Calculate the number of millimoles of HCI needed to reach the methyl orange end point. 3. What is the %Na₂CO, and %NaHCO, present in the soda ash sample? b. From the dilute soda ash solution (DSAS) two 50-mL portions were obtained. The first portion needed 5.20 mL of 0.1200 M HCI to reach the phenolphthalein end point. The second 50-ml portion needed 15.20 mL to reach the methyl orange end point. 4. Calculate the number of millimoles of HCI needed to reach the…arrow_forwardA5.85% (w/w) Fe(NO. )g (241.86 g/ mol) solution has a density of 1.059 g/mL. Calculate 1, the molar analytical concentration of Fe(N03)g in this solution. 2. the molar NOg- concentration in the solution. 3, the mass in grams of Fe(NO3)g contained in each liter of this solution.arrow_forward
- What is the molarity of aspartic acid (C4H7NO4, MM = 133.11 g/mol) if 4.56 g is dissolved inenough water to make 1500.0 mL of solution?A. 2.28B. 0.0228C. 2.82D. 0.0300arrow_forward1. What is pCl for a solution of 0.0345 M in ZnCl,? Type only the numerical value in standard form-four significant figures. 2. What is the ppm of the C,H0, if 3.0 mg of it found in 300 kg of drinking water? Type the numerical value in standard form with unit (ppm) - one significant figurearrow_forwardanswer the following: 1. Why do sodas contain acids? 2.Titration of a soda sample of 20.00 mL requires 22.65 mL of 0.45 M of NaOH. What is the molarity of the citric acid present in the sample? 3.Based on the previous problem, calculate the concentration of the citric acid in the sample in mg/mL.arrow_forward
- 3. Which of the following statement/s is/are correct? 1. 3.00 N H,SO, is equivalent to 6.00 M H2SO4. II. 5.29 % (w/v) HCl is equivalent to 1.45 N HCI. III. 3.18 M NaCl is equivalent to 9.29 g NaCl in 50 mL solution. (M12504 = 98.086 g/mol; M,ICI = 36.458 g/mol; MNaCi = 58.44 g/mol) O l and II O Il only O l and II O I and IIarrow_forward10. A 0.514 gram sample of NazCO, (106.0 g/mol) was dissolved in distilled water in a 100.0 mi volumetric flask. The molar concentration of Na,CO, in solution is: 0.0485 M 0.0370 M b. 0.4849 M 0.0340 M 0.0330 M d. е.arrow_forward28. A 10% (w/v) (NH4)2SO4 standard is needed. How much solute would be needed to make 50 ml? vide ore contained in 300 ml. of an 8% (w/w) solution?arrow_forward
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