1. In the Metric System (SI), what is the basic unit of measurement & abbreviation () for the following: Distance (length): ) Liquid Volume: Mass (weight): 2. Using water at 4°C, fill in the following information: 1 cm³ ml 3. Make the following conversions IM= A cm 10 4. How much water is present in each of the following graduated cylinders? Be sure to include units. 10 mm B.. μm 10 C. nm 5. What is the difference between qualitative and quantitative values?
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- 11. A 10-mL graduate weighs 42.745 g. When 5 mL of distilled water is measured in it, the combined weight of the graduate and water is 47.675 g. By definition, 5 mL of water should weigh 5 g. Calculate the weight of the measured water and express any deviation from 5 g as percentage of error.3. An empty graduated cylinder weighs 26.80 ± 0.01 g. The mass of the graduated cylinder with 10.0 + -1.1 ml of liquid in it is 34.07 + 0.01g. What is the mass of the liquid? 4. If a graduated cylinder weighs 28.54 + 0.01 g, and if the graduated cylinder containing 9.0 ± 0.1 mL of a liquid weighs 36.19 + 0.01 g, what is the density of the liquid? 5. A student determines that an unknown liquid has a density of 0.78 g/ml., a boiling point of 63.0+ 0.1°C, and it is soluble in water and in ethyl alcohol. Use the table to idehtify the most likely candidate for the unknown liquid. What is the second most likely candidate for the unknown liquid? 6. Do any of the unknown liquids boil at temperatures above the boiling temperature of pure water?DATA Determine the Molar concentration of your dilutions using the formula M₁V₁ = M₂V₂. The initial molarity is 0.0001M (1x10-4M). M1 V1 1.56E-06 500uL Concentrations Tube 1 1.56E-06 Tube 2 Absorbance Tube 1 Tube 2 M2 Tube 3 Tube 3 V2 1000uL Tube 4 Tube 4 Tube 5 Tube 5 Tube 6 Tube 7 Tube 6 Tube 7 Tube 8 Tube 8 Tube 9 Tube 9 Tube 10 Tube 11 Tube 10 Tube 11 10
- 1. Choose the most appropriate glassware (1.0 mL pipette, 50 mL Erlenmeyer flask, 100.0 mL graduated cylinder, 10.0 mL pipette, 1,000.0 mL graduated cylinder, 20.0 mL beaker, or 50.0 mL beaker) for measuring the following volumes 2 mL of distilled water 0 mL of sugar water 5 mL of coffee 0 mL of orange juice 0 mL of tea 0 mL of saltwater 0 mL of milk8. In an experiment, the concentration of the pesticide Lindane (L) was determined by GC analysis by adding an aliquot of toluene (T) to it. First, the peak areas of standard solutions of each was measured and gave A(0.01M)-44,000 and Ar(0.006M) - 12,000. To 10.0 ml of a 0.02M toluene solution was added 20.0 ml of the unknown Lindane solution and diluted to 50.0 ml. The absorbance for each was AL- 120 and Ar-840. Find the concentration of Lindane in the unknown sample..BSA Concentration (ug/mL) Abs 2000 2.25 1500 1.715 1000 0.915 750 1.156 500 0.714 250 0.082 125 0.086 25 0.082 Create a BSA standard curve Abs562=f[BSA] using a Scatter Plot representation in Excel.
- You record the absorbance of your unknown BSA sample at 0.276. What is the concentration in ug/mL of the unknown assuming you have a standard curve with the line of best fit with y=0.0001x+0.0038 as its equationAs a technician in a large pharmaceutical research firm, you need to produce 200. mL of 1.00 M potassium phosphate buffer solution of pH = 6.96. The pKa of H2 PO4 is 7.21. %3D You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K2HPO4 stock solution, and a carboy of pure distilled H2O. How much 1.00 M KH2PO4 will you need to make this solution? Express your answer to three significant digits with the appropriate units. > View Available Hint(s) HẢ Volume of KH2PO4 needed = Valıxe Units SubmitHow to calculate Km value and Vmax in buffer 1 and 2
- A buffer contains 0.015 mol of lactic acid (pK₁ = 3.86) and 0.080 mol of sodium lactate per liter. H₂C OH Lactic acid OH Calculate the pH of the buffer. H₂C. Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of the buffer. O OH Sodium lactate Calculate the change in pH after adding 9.0 mL of 0.10 M HCl to 1.0 L of pure water. O Na+ buffer pH: buffer pH change: water pH change: units unitsi) Write down the equation derived from your Excel generated standard curve , figure legend and describe its components; ii) provide the values of the absorbance data of the unknown sample (do NOT show the absorbance data of the glycine standards). Show all details of the working out of your calculation. Indicate all units! Provide the answer with two decimals precision2. The following question tests your lab skills as well as basic knowledge understanding: In Lab1- KHP Determination, 0.85 g moisturized NaOH (M.W.= 40.01 g/mol) solid was dissolved in 500.0 mL of water. 24.21 mL of this NaOH solution was consumed to reach the equivalence point when titrated with 0.2021 g of pure KHP (M.W.=204.22 g/mol. Solid was fully dissolved in 50 mL deionized water). (a). Please write the reaction equation (balanced). Then calculate the precise concentration of NaOH solution. List all steps. (b). What are the primary standard and secondary standard material in the above operation respectively? (c). During the above operation, what glassware/tools were used to measure 0.85 g NaOH, to store 1 liter NaOH solution, to measure pure KHP solid, to conduct the titration, respective ? (d). Can this titration be used to measure the pH value of an unknown solution? Why or why not? (e). Did we use a pH buffer solution in the…