5. A 0.01 M solution of HCI will not hurt your skin, yet a 0.1 M solution of HCI will leave a painful sore. Explain. *
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- 1. Given .750L of a 12M HCI solution, what volume of 5.00M HCI could you make?1. What is the concentration of the solution prepared by diluting 50 µl of ampicillin (1.0mg/ml) to a final volume of 1ml? 2. Determine the volumes of phenol, chloroform, and isoamyl alcohol required to prepare250 ml of a 25:24:1 (v/v) solution.1. Calculate the pH of the following solutions a. 2 μM HCI b. 3 x 10-³ M KOH
- 1. Prepare 30 mL of a 5 mg/mL oral phenobarbital solution using phenobarbital available from the manufacturer in a 65 mg/mL solution that comes in 1-mL vials. How much stock solution will be required? 2. What mass in milligrams of potassium nitrate is present in 0.25 kg of a 500 ppm aqueous solution of KNO,?8. What mass of solute is needed to prepare each of 1.00 L of 0.125 M K2SO4 solutions? (2 Points) 21.8 g K2SO4 218.0 g K2SO4 2.816 g K2SO4 28.16 g K2SO43. The following absorbance spectrum was collected. What color is the sample solution? Explain using the color wheel. 1.4- 1.2 0.8 0.6+ 0.4 0.2 300 400 500 600 700 800 wavelength (nm) 4. Given the Beer's Law Plot for permanganate in the Introduction of the lab handout, what would be the concentration of an unknown permanganate sample if the absorbance was 0.308. Absorbance
- A patient is prescribed 0.151 g of Lidocaine intravenously. The lidocaine is available as a 12 mg/mL solution. How many mL must be administered?5. We have 100 mL of 5X TBE (Tris/Borate/EDTA) solution and need to make 1 L of 2X solution. Solid compounds also exist for each of these materials. The molecular weight of Tris is 157.60; Borate has molecular weight of 58.80 and EDTA has a molecular weight of 292.44. a) What is the stock concentration? b) What is the final concentration? c) What is the starting volume? d) What is the final volume? e) Write out the equation used to solve this. Show all your work. Are we able to make a solution using this dilution method using are starting materials? If not, propose another way to make the desired concentration and volume of the solution. Show your work.1. Calculate the pH of the following solutions: A. [H+] = 1.36 x 10-9 M В. [ОН] —D 3.86 x 10-8 М 2. Calculate the pOH of the following solutions: A. [OH-] = 8.6 x 10-8 M В. рH %3D 3.2 3. What is the pH of a buffer prepared by mixing 100 ml 0.050 mM NAH2PO4 and 25 ml 0.075 mM Na2HPO4? (рКa1%32.2; рКо23 7.21; pКаз312.7)
- 1. compute for patient B result of his chloride analysis with the following data using mg/dL unit factor: 355/ mg/dL , Absorbance sample = 0.2148, Absorbance standard = 0.3017 a. 24.8 mg/L b. 25.27 mg/dL c. 2.7119 mmol/L d. 252.7 mg/dL 2. an adult patient suffering from debilitation is supected of calcium deficiency. His doctor requested for calcium anaylusis with the following data gathered standard known value is B: Absorabance is 0.2876. sample absorbance is 0.4291 compute for the calcium in mmol/L a. 53.6mmol/L b. 5.36 mmol/L c. 11.9 mmol/L d. 119mmol/L 3. calculate the value of sodium where the PREC solution has diclored. data gathered are the following: Absorbance of Reagent Blank = 0.3124 Absorbance of sample = 0.114, Absorbance of standard = 0.275 value is 150mmol/L a. 108.2 mmol/L b. 170.4 mmol/L c. 795.72 mmol/L d. 79.5 mmol/LYou just made a 1.5M permanganate solution. What concentration is your potassium permanganate solution in percent? "K: 39.10 g/mole" "Mn: 54.94 g/mole" "O: 16 g/mole" "MW of KMnO4 is 158.04 g/mole" O a. 0.24% Ob. 20.1% O c. 15.8% O d. 23.7% O e. 2%6. What volume of a 9% NaCl solution is needed to prepare 100 mL of a 0.9% NaCl solution?