Standardization of Hydrochloric Acid Solution Answer the concentrations in 3 significant figure. The tolerance or error should follow the decimal place of the value. You can use scientific notation using "e". Example: 0.0010 = 1.0e-3 Primary Standard: Na2C03 Formula Mass of 1° Standard: 105.99 g/mol Purity of 1° Standard: 95% Instrument used: Analytical Balance Trial 1 3 0.0504 + 1° Standard 0.0510 (same 0.0501 (same weight, g as 1) as 1) Net vol. of 18.00 ± 0.14 18.30 ± 0.14 17.90 ± 0.14 HCI, mL M HCI Average M HCI
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Given the following data, what is the molarity? Include the relative error
Error is 1.0 mg or 1.0e-4
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- Calculate the molarity of dilute Ca(OH)2 solution if the titration of 30.00 mL of 0.05231 M HCl required 24.76 mL of the acid. An 0.2500 g hydroxide tablet sample submitted in the lab used 36.75 mL during titration. How much is the hydroxide in mg present?A patient’s treatment plan requires two IV solutions to be administered:20% magnesium sulfate, MgSO4, and 10% calcium chloride, CaCl2. Thenurse is concerned, MgSO4 and CaCl2 are listed as incompatible IVsolutions with the risk of solid precipitate formation (image shown toright). Write the chemical equation that predicts the products thatform when combining MgSO4 and CaCl2. Please use the providedsolubility chart to help you determine chemical phases.Match the common laboratory scenarios to the correct buffer required using the guide below. Molecule pKa Value(s) Acetic acid 4.8 Carbonic acid 6.1, 10.2 Citric acid 3.1, 4.8, 5.4 HEPES 7.5 Phosphoric acid 2.1, 7.1, 12.3 TRIS 8.3 Mammalian cells require a pH of about 7.4 for cell and tissue culture experiments. Elution of remaining molecules from a cation exchange column requires washing with pH 10 buffer. Dissolution of lysozyme requires pH 3 buffer to maintain activity. Elution of remaining molecules from an anion exchange column requires washing with pH 2 buffer.…
- The normal range of the sodium electrolyte in the body is 134 to 145 mEq/L. The term mEq is dependent on the charge of the ion. Since sodium is a +1 ion, 134 mEq/L is the same as 134 mmol/L. An ion that has a greater positive or negative charge; however, will have 1 mEq for each positive or negative charge of the ion for every 1 mmol. For example, for Ca+2, 2mEq/1mmol. If the standard range of Magnesium in the body is 0.70 to 0.95 mmol/L, convert this value into mEq/L for the Mg2+ ion. (Use dimensional analysis to figure this out)You own a compounding able pharmacy and are presented with a presciption for fortified gentamicin eye drops 5mg/mL. You have in stock a gentamicin injection at 40mg/ml and 5ml gentamicin eye drop labled to contain 3mg/ml. How many mililiters of the injection should be added to the 5ml of the commercial eye drop to gice it a 5mg/ml "fortifited" concentration?Describe the preparation of the following solutions include all mathematic calculations and equipment of the laboratory needed A.500 mm of a solution of KNO 1.50 M B. 150 g of a solution 5.0% of NaC2H3O2 C. 500 mm of a solution of NaOH 0.50 M from a solution of NaOH 6.0 M
- Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 7.4–7.6? NaOCl / HOCl (K a = 3.2 × 10 –8) NH 3 / NH 4Cl (K a = 5.6 × 10 –10) NaNO 2 / HNO 2 (K a = 4.5 × 10 –4) NaCl / HCl CH 3COONa / CH 3COOH (K a = 1.8 × 10 –5)Draw titration curve for compound X when NaOH equivalence(s) is/are added. Indicate the buffering region(s) with a box.Sodium Citrate 5 g Tartar Emetic 0.015 g Cherry Syrup ad 120 mLUsing a balance with a sensitivity of 4 mg, an acceptable weighing error of 5%, and cherry syrup as the solvent for tartar emetic, how could you obtain the correct quantity of tartar emetic to fill the prescription?
- 439 mL of 0.270 M hydrochloric acid is exactly neutralized with 0.920 M potassium hydroxide solution. What volume of base solution is required?Sodium chloride, the table salt (NaCl) is added in cooking to enhance the flavor of the food. When 10.0 g of NaCl are added in 200.0 mL of water at 25.0oC in a coffee-cup calorimeter, 669 J of heat are absorbed. (Assume that there is no change in volume, d=1.00 g/mL, specific heat=4.18 J/g.oC). Evaluate the truthfulness of this statement: "Based on the above description, the solution process (i.e., the dissolution of NaCl or the breakdown of NaCl into its constituent ions) is exothermic." True FalseAn aqueous solution is 3.50 % by mass hydrochloric acid, HCl, and has a density of 1.02 g/mL. The mole fraction of hydrochloric acid in the solution is ____.