biochem lab final exam

What is the solubility of HgI2 in water? The Ksp for HgI2 is 4.0X10^-29

researchers working in a chemistry lab were examined anatomical structures of the brain using concentrated formaldehyde solutions. Once their studies concluded there remained 1.5 gallons of the substance and the researcher decided to pour this down the drain. In this case, they directly violet regulations put in place by which office?1. Office of research integrity 2. Institutional animal care and use committee3. Occupational safety and health administration 4. Institutional review board

Prepare 100 μL of 10.0 mM hydrolyzed sucrose in 10.0 mM acetate pH 4.8 as a standard, in a 1.5 mL microcentrifuge tube, also incorporating 5.00 μL of 5.0 mM tris pH 7.4 within the 100 μL volume. Using a stock solution of 20.0 mM sucrose substrate in 10.0 mM acetate, calculate the volumes of hydrolyzed sucrose, acetate, and dH2O.

How much ppm will replace 200kg/ha of Ca++? *a.) 100b.) 40c.) 20d.) 0.2

Indicate the appropriate protocol below to prepare the required solution. a) Solution 5 Preparation: Prepare: 10 mL of 23% mannitol From: solid mannitol Procedure:  b)  Solution 2 Preparation: Prepare: 0.5 liters of 0.01 mg/mL ascorbic acid From: solid ascorbic acid , MW = 176.1 g/mol Procedure: C) Solution 3 Preparation: Prepare: 1 liter of 150 mM Tris From: 1 Molar Tris stock solution Procedure:

a)Volume of anti-bacterial gel is 5.00 cm3,and the Volume of anti-bacterial gel solution is 100.0 cm3 , calculate the Concentration of ethanol in the anti-bacterial gel (% (v / v))   b) Round the concentration of ethanol in the anti-bacterial gel (% (v / v))

What mass of riboflavin (in mg) must be dissolved in 0.02 M acetic acid solution (we have 2L of acetic acid, assume density is 1.0 g/mL) to create 500 mL of a 50.0 ppm standard solution of riboflavin?

convert glucose concentration in g/100ml from 0.144mM

List all possible methods for the quantitative determination of glucose solution: A) Polarimetry B) Refractometry C) Reverse iodometry D) Reverse alkalimetry

To harvest blood culture, you add 100ul 10ug/ml colcemid to 10 ml blood culture.     What is the final concentration of colcemid in your blood culture?

5.00 ml of the 1.0 x 10-4 M CV stock solution is first diluted to 100.ml. Then 1.00 ml pf this solution is diluted again to 50.0 ml. What is the final concentration?

A student needs 50.0 mL of 5.74×10 -4 M FD&C Blue Dye No. 1 solution. If the student has 2.00 mM FD&C Blue Dye No. 1 stock solution to work with, how much of the 2.00 mM solution should be added to the 50.0 mL volumetric flask? Hint, 2.00 mM is 0.00200 M.     14.35 mL     0.06971 mL     3.485 mL     12.85 mL     6.971 mL

1. Make 1800 mL of a 50% weight/weight acetone alcohol solution. Specific gravity acetone: 0.786 Specific gravity alcohol: 0.810 2. Calculate the dilution using 0.5 mL of urine and 8.5 mL of isotonic saline. 3. Calculate the dilution of 0.1 mL serum in 0.9 mL water.

1) How much total glucose is present in a 75 Kg female person? (a normal person (70 kg BW) has approximately 43L body fluid).2) Please express the normal salt (NaCl) concentration in body fluid into molarity (mM).3) Commercial fuming Sulphuric acid (Oleum-H2S2O6) is 99.9% solution. Please convert it into molarity.4) Find out the Volume (dm3) of product (gas) at RTP when 0.58 M, 150 mL NaOH (aq.) reacts with 350 mL, 0.25 NH4Cl.5) The above reaction has the product Ammonia, which when dissolved in 650 mL ethanol makes an alkaline ethanolic solution. Find its molarity (M).6) Calculate the adult dose as per the BW of the baby. (Child dose-50 mg and the BW of the baby is 48 lb (British pound) (1lb=0.453 Kg)

GST protein has a molecular weight of 26kDa.  You want a 0.5µM solution of the protein in 100mL. How much of the protein do you add (in grams)?

In the conductivity test, _____________________ is going to result to a brightly lit light bulb. a. 70% v/v ethanol b. 1.0 M citric acid c. Mixture of 10.0 mL 1.0 M Mg(OH)2 and 10.0 mL 1.0 M HNO3 d. Glacial acetic acid

1. What is the purpose of rinsing and disinfection in hemodialysis treatment?2- When and how often needs to do disinfection and rinsing? 3.Which process is first rinsing or disinfection?4- Did you experience any troubleshooting procedure during the lab? If yes, pleaseexplain how identified and solved the problem?

6 I-  +  BrO3-  +  6 H+ ----- 3 I2  +  Br-  +  3 H2O Rate= k[I-]m[BrO3-]n[H+]p rate= (∆[I2])/(3*∆time)             [I-]   0.010M [S2O3-2] 0.0010M H2O   [BrO3-] 0.04M HCl  0.10M Starch Indicator (sec.)   Volume, ml Volume, ml Volume, ml   Volume, ml Volume, ml     1 10 10 20   10 10 1-3 drops 301.90 2 20 10 10   10 10 1-3 drops 213.28 3 10 10 10   20 10 1-3 drops 214.92 4 10 10 10   10 20 1-3 drops 86.45 Temperature of Reaction: _______20 C________ 1. Using the dilution equation (M1V1 = M2V2) calculate the concentration of the I-, BrO3- and the H+ (HCl) in the final mixture just prior to any reaction. 2. Calculate the rate for each experiment as explained in the background information. 3. Using the information above determine the rate law (m, n and p) for the reaction. Show all calculations/reasoning in your notebook. m_____________ n_________________ p…

How much of the suspending agent is needed to prepare a 60-mL preparation of Aluminum hydroxide gel based on this formulation? Ammonium alum 800 g Sodium carbonate 1000g Peppermint Oil 0.01% (0.01 g/100mL) Sodium benzoate 0.1% (0.1 g/100mL) Purified water, qs ad. 2000 mL   a. 0.06 g b. 30 g c. 24 g d. 0.006 g

How much of the preservative is needed to prepare a 120-mL preparation of Aluminum hydroxide gel based on this formulation? Ammonium alum 800 g Sodium carbonate 1000g Peppermint Oil 0.01% (0.01 g/100mL) Sodium benzoate 0.1% (0.1 g/100mL) Purified water, qs ad.2000 mL   a. 0.12 g b. 60 g c. 48 g d. 0.012 g

A glucosamine solution of unknown concentration was diluted as follows:  1 mL of the solution was diluted to 5.0  mL.  A 0.3 mL aliquot of this solution was diluted with 0.7 mL of water. The concentration of the final diluted solution is 0.292 umol/mL. What is the concentration of the original undiluted solution?    Original: ? First dilution: ? Final dilution: 0.292 umol/mL

You are given 150 mL of an oil made up of a mixture of 3 fatty acids: palmitoleic acid (C 16:1 (n-7)) erucic acid (C 22:1 (n-9)) stearidonic acid (C 18:4 (n-3))   You know that the 150 mL sample of this oil was prepared by adding 60 mL of palmitoleic acid to 90 mL of a mixture of erucic acid and stearidonic acid.   Using a hydrometer you carefully measure the density of the 150 mL sample of oil and your analysis indicates that it has a density of 0.900 g/cm3.   The densities of the individual fatty acids are: palmitoleic acid = 0.894 g/cm3 erucic acid = 0.860 g/cm3 stearidonic acid = 0.9334 g/cm3   Can you determine the volumes (in mL) of erucic acid and stearidonic acid in the total volume (150 mL) of the oil mixture?

For the CO2 impact experiment station: 1)         Obtain two plastic cups, red cabbage indicator, a straw, and plastic wrap. 2)         Fill each cup approximately one-quarter to one-third full of tap water and add ~10 mL of the red cabbage indicator. 3)         Place the two cups side by side on a sheet of white paper. 4)         Place the straw into one of the beakers and cover that beaker with the plastic wrap. 5)         Carefully blow bubbles into the test cup for 3 min. and observe both cups.  6)         Compare the color to the control cup and record any differences. This the Question:  Did the beaker with the solution into which CO2 was bubbled change pH/color?  By how much?  Is this what, you would predict, based on your knowledge of the chemistry of CO2?

Have 50 gallons of water dripping concentrated nutrients into the water system. Need a concentration of 1500 ppm. Using 16% N, 5% P, 30% K, 15% Mg, and 5% Ca.

1. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1500 M CaCh2 Solve for the concentration of the stock solution in M. 2. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1200 g CaCl2 Solve for %w/v CaCl2 in the stock solution.

Calculate the solubility of PbCO3 in water at 25°C . You'll find Ksp data in the ALEKS Data tab. Round your answer to 2  significant digits.

What is the concentration in ppb of Polychlorinated biphenyl's (PCB) in a chemical spill, if there is 0.060 mg in 4600 kgofsoil?a) 0.0013b) 1.3 x10^-5c) 0.013d)0.13e) 1.3

Pretend you are making dilutions using a 20-mg/dL stock standard solution of uric acid. Complete the table to indicate preparation of various concentrations. Concentration (mg/dL) Stock Standard (mL) Distilled H2O Total Volume of Dilution (mL) 0 0.0 5.0 5.0 2.5     5.0 5.0     5.0 7.5     5.0 10.0     5.0 12.5     5.0 20.0 5.0 0.0 5.0