You have a 5.0 ml sample of a protein in 0.5M NaCI. You place the protein/salt...
7) (2 points) if we place one dialysis bag (permeable to water but not permeable to Naci) filled with 10% Nach into a beaker of distilled water and wait 2 hours what is the expected result? Explain what would happen to the weight of the bag (you do not need to have specific numbers, just trends). Explain why it happened.
yellow, green or red, the test is positive. The color of the solution depends on the concentration of 3. Observe the color of your negative and positive controls. Note which one has a red color. 4 After the dialysis of the NaCi-elucose-red dye solution has progressed for an hour, test the water outside the dialysis bag (your experimental data) for the presence of Ci and glucose same way you did for your controls in steps 1 and 2. Observe if...
Experiment 2: Diffusion Concentration Gradients and Membrane Permeability Data Tables Table 2: Indicator Reagent Data Indicator Starch Positive Starch Negative Glucose Positive Glucose Negative Glucose Test Strip n/a n/a green yellow IKI Solution dark blue light brown n/a n/a Table 3: Diffusion of Starch and Glucose Over Time Indicator Dialysis Bag After 60 Minutes Beaker Water After 60 Minutes Glucose Test Strip yellow green ( if all glucose passed to the beaker from the bag) IKI from incolore changed to...
30. How many Tablespoons of table salt (NaCI) would you need to add to 2 quarts of water to increase the boiling point by 5°C? (1 Tablespoon NaCl = 17.06 g; 1 quart-0.946 L; d(H2O) 1.0 g/mL) (a) 17 (b) 32 (c) 79 (d) 540 31 . A covalent compound with molar mass of 62.0 g/mol was dissolved in water at 20.0°C to yield a 2.00 L solution with an osmotic pressure of 524 torr. What mass of the compound...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was placed in a beaker containing a solution of 20% glucose. After one hour, the bag was weighed again a. Calculate the % mass change of this dialysis bag from the following information: • Mass of bag before experiment: 15.39 • Mass of bag after experiment: 12.79 b. Determine the tonicity of the beaker when it is compared to the dialysis bag: 2. facell had...
Biochem help 2 14. What would be the net charge on the dipeptide Ser-His at pH- 6.04? (Choose the one best answer.) a) 1.5 b) +1; c) +0.5 d) 0 e) -0.5; 15. The pKa of a lysine side chain in a protein ending up on the outside of a globular protein has a different pKa than if the lysine is buried within the interior of a protein. What would be the expected pKa of a side chain of lysine...
You have a water sample from a creek that is thought to contain some amount of dissolved copper ions. It has no apparent blue color. You set up standards of varying known concentrations of Cu2+, mix 0ml of each into 1.0 ml 10 g/L glucose + 1.0 ml of BCA solution, let them all sit long enough to reach equilibrium (some heat helps them get there faster), and you find these results: Cu2+(mg/L) Absorbance at 562nm 0.0 0.000 2.0 0.150 4.0...
EQUL 499- Det. Of pH of Strong Acid, weak acid, salt, and buffer solution Discussion Topics Discussion Topics (need to submit in Blackboard): 1. What is a buffer? • A buffer is a solution that, when introduced to a new environment, undergoes minimal pH change, typically when adding acidic or basic solutions. These are extremely important for life because the pH of human blood is delicate and even if it is changed by 0.1, there may be catastrophic effects. 2....
1. Calculate the molarity of the following solutions: a. 318 g Mg Br, in 859 ml solution b. 8.28 g Ca(C,H,O,), in 414 ml solution c. 31,1 g Al,(80.), in 766 ml solution d. 59.8 g CaCl, in 100 ml solution e. 313.5 g LICIO, in 250 ml solution | 849 Calculate the moles of solute needed to prepare each of the following: 2. LOL of a 3.0 M NaCl solution b. 0.40 L of a 1.0 M KBr solution...
question#1 Experiment 17A. A Solubility Product Constant Procedure Getting Started 1. Obtain a 10 ml pipet, a 50 mL buret, and 2 pieces of 120 cm filter paper Preparing Saturated Solutions of M10J MIO), is an insoluble divalent iodate salt. The identity of the cation M-is unknown. 1 Prepare MIO,), by adding S0 ml of o.2 M KIO, to 20 mL of 1 Molar M(NO,J, in a 150 mt 2. Stir the mixture vigorously with a stirring rod. A white,...