Lab 2

Given the Ksp for Ag2CrO4 is equal to 1.20 x 10-12, calculate the percent error in your experimentally determined value for average Ksp (this will be an extremely large percentage – think about why).

Write a conclusion based on the result above

Chemistry 5 grams of cereal was crushed and dissolved in 25 mL water and placed in a dialysis bag. This sample was dialysed over a week in a beaker which contains 500 mL of water. 5 mL of the dialysate (an aliquote from the 500 mL) was separated to determine the glucose concentration. The glucose concentration was determined as 5 mM. Calculate the amount (% w/w) of glucose present in the cereal. Hint: The molecular weight of glucose is 180.

Calculate the solubility of PbF, in water at 25 °C. You'll find K data in the ALEKS Data tab. sp Round your answer to 2 significant digits. x10

Explain the function of each electrode in the polarography cell

Write a conclusion based on the result above

Chemistry In a whole-cell patch-clamp experiment at 32 degrees C, the intracellular solution contains 16 mM NaCl, 150 mM K-gluconate, and 1µM Ca(NO3)2, and the extracellular solution contains 150 mM NaCl, 3 mM KCI, 25 mM NaHCO3, 2 mM MgCl2, and 1.5 mM CaCl2. The below graph is a current-voltage (I-V) curve generated by measuring the current flux through a specific ion channel over a range of voltages (-100 to +40mV). What is the reversal potential of this current? 1000 800 - 600 400 – 200 – T T -100 -80 -60 -40 -20 20 40 -200 - -400 - pA

Bra Н20

In one paper, draw a simple visual summary of all the units (Structure & Properties of Matter, Organic Chemistry, Energy Changes and Rates of Reaction, Chemical Systems and Equilibrium, and Electrochemistry) in grade 12 chemistry.

A solution that is 0.20 molar in monomer and 4.0x10-3 M in a peroxide initiator is heated to60 °C. How long will it take to achieve 50% conversion? kp = 145 liters/mol-sec, kt = 7.0 x107 liters/mol-sec, f = 1, and the initiator half-life is 44 hr.

1) Listen The Ksp value for calcium sulfate [CaSO4] is 2.40 X 10-5 and a professor made 1825 mL of a CaSO4(ag) solution but then one of his graduate student accidentally poured in a 0.125 M solution of calcium phosphate [Ca3(PO4)2] solution. You may ignore the additional volume coming from the Cag(PO4)2 solution to make the calculation simpler. Now that you have calculated the new equilibrium constant (K) with this common ion effect then which way will the chemical equilibrium shift? need more information to be determined at equilibrium chemical equilibrium will shift to the right first and then to the left chemical equilibrium will shift to the right chemical equilibrium will shift to the left 201591..docx LAB EXP. #3 -..docx Show All

Chp14-5(2)

B3

1- Imagine that you are working as a biomedical engineer in the hospital. At an emergency situation somehow, hospital lost all of its equipment for sterilization. However, there are several different types of disinfectants that are not sporicidal at the concentrations that are used for disinfection. You are asked to develop a strategy to sterilize metallic surgical instrument. What would your strategy be? Please explain and give reasons.

A soil sample taken from a hill reveals that soil solution in the top 30 cm of soil contains 900 micromoles Ca/L. Imagine that the grass growing on this hill has a water use efficiency of 400 g H20/g dry matter. Calcium is considered to be sufficient when between 1-2% of the dry matter. Calculate the calcium content in the soil's dry matter and determine if the level is sufficient.

* Vinegar - colour of solution = bright pink, observed pH = 1, Measured pH = 1.62 *Soap - colour of solution purple, observed pH = 6, Measured pH = 5.60 *Laundry Detergent - colour of solution blue green, observed pH 10, = I Measured pH = 8.20 A. Show your calculation for [H30 +] and [OH-] values for each product and indicate if it is an acidic or a basic substance. (20p) Skip question Exit Tyne here to search

3c₂2- 1 Tap here or pull up for additional resources + 2 (s) OH- Complete and balance the following redox reaction in acidic solution H₂O₂(aq) + Cr₂O72- (aq) → O₂(g) + Cr³+ (aq) 3 O Reset e (1) H* Question 14 of 14 e 5 LO Cr 6 MacBook Air H 7 个 • x H₂O 8 H₂O* 9 (aq) H₂O O Submit

Complete the blanks.

Bucks McGee, after being poisoned, is currently being treated in the hospital with an antidote- the chemical Fe(CN)18. The compound is so intensely coloured that even a small amount of it makes for a black or dark blue suspension. 2022-02-0. Given that this antidote has never before been administered at the hospital, none of the doctors or nurses have experience with it. There is one very old bottle of Fe>(CN)18 pills in the medicine store-room, but the label is worn and the units are in the old, archaic British Apothecaries' system which has unusual units like drachms, scruples, grains, and mites: 453.6 grams (g) = 1 pound (Ib) = 12 ounces (3) = 96 drachms (3) = 288 scruples (3) = 5760 grains (gr) = 115200 mites (m) ruu useu tnis antidote long ugu at dnother hospital, and who seemed to remember that they used to make 0.025 M solutions of this compound in ethanol and give 45 mL of the solution three times daily. What critical information is missing from the worn label? How many pills…

Please provide the following answers:- reaction rate order- rate constant- Activation energy if A=80,000- Temperature if reaction will be 12 times as fast

When a conductivity cell is filled with KCl with a concentration of 0.10 mol/dm3 and an intrinsic conductivity of 1.1639 Sm-1, its resistance at 25 °C was measured as 24.36 ohms. When the same cell was filled with acetic acid solution with a concentration of 0.01 mol/dm3, its resistance at the same temperature was measured as 1982 ohms. A) Find the cell constant. Blank 1. Fill in the blanks, read the relevant text. Blank 2. Fill in the blanks, read the relevant text. B) Find the conductivity of the acetic acid solution. Blank 3. Fill in the blanks, read the relevant text. Blank 4. Fill in the blanks, read the relevant text. C) Find the molar conductivity of the acetic acid solution.

Colligative properties Henry’s Law –effect of pressure on gas solubility Fractional distillation Fractional crystallization Polymer Polyamide polyester Soap Nuclear reaction Cobalt-60 First order kinetics Second order kinetics Activation energy Catalyst pH acid anhydrides base anhydrides buffers titration acid/base properties of salts Galvanic cell Electrolytic cell Select the predominant concept or word that apply to the following situations. ________Miner burps when riding elevator up and out of a mine after having a carbonated beverage for lunch ________Salt is put onto roads in cold wet weather ________Moonshiners method to purify whiskey ________Layman call these “plastics” ________Sodium salt of a fatty acid ________We add lemon juice to fish to get rid of the smell. ________Method for determining the acid or base concentration of a solution ________Source of electricity in your cell phone Used to make gold plated Jewelry

Current, μA +100.0 +80.0 +60.0- +40.0 +20.0 0.0 I -20.0 T 0.0 -0.2 Limiting current Y Xi/2 E1/2 Z A+ ne P -0.4 -0.6 -0.8 -1.0 Eapply V vs. SCE Why does current stop increasing and plateaus at -0.6 V

Time (sec) PH [RX] [H30+] Ln[RX] 0.000 7.000 0.00002344 0.0000001 -10.6610666 15.000 6.400 0.00001954 0.00000039 -10.8430469 30.000 5.410 0.00001955 0.00000389 -10.8425353 45.000 5.230 0.00001756 0.00000588 -10.94988696 60.000 5.070 0.00001493 0.00000851 -11.11213794 75.000 4.920 0.00001142 0.00001202 -11.3801444 90.000 4.840 0.00000899 0.00001445 -11.6193977 105.000 | 4.780 0.00000685 0.00001659 -11.8912619 120.000 4.750 0.00000566 0.00001778 -12.08208666 135.000 4.720 0.00000439 0.00001905 -12.33618133 150.000 4.700 0.00000349 0.00001995 -12.56569882 165.000 4.670 0.00000207 0.00002137 -13.08796195 180.000 4.670 0.00000207 0.00002137 -13.08796195 195.000 4.660 0.00000157 0.00002187 -13.3644349 210.000 4.650 0.00000061 0.00002283 -14.30980687 225.000 4.650 0.00000061 0.00002283 -14.30980687 240.000 4.640 0.00000061 0.0000229 -14.30980687 255.000 4.640 0.00000061 0.0000229 -14.30980687 270.000 4.640 0.00000061 0.0000229 -14.30980687 285.000 4.630 0.00002344 Undefined 300.000 4.630…

Time (sec) pH [RX] [H30+] Ln[RX] 0.000 7.000 0.00002344 0.0000001 -10.6610666 15.000 6.400 0.00001954 0.00000039 -10.8430469 30.000 5.410 0.00001955 0.00000389 -10.8425353 45.000 5.230 0.00001756 0.00000588 -10.94988696 60.000 5.070 0.00001493 0.00000851 -11.11213794 75.000 4.920 0.00001142 0.00001202 -11.3801444 90.000 4.840 0.00000899 0.00001445 -11.6193977 105.000 | 4.780 0.00000685 0.00001659 -11.8912619 120.000 4.750 0.00000566 0.00001778 -12.08208666 135.000 4.720 0.00000439 0.00001905 -12.33618133 150.000 4.700 0.00000349 0.00001995 -12.56569882 165.000 4.670 0.00000207 0.00002137 -13.08796195 180.000 4.670 0.00000207 0.00002137 -13.08796195 195.000 4.660 0.00000157 0.00002187 -13.3644349 210.000 4.650 0.00000061 0.00002283 -14.30980687 225.000 4.650 0.00000061 0.00002283 -14.30980687 240.000 4.640 0.00000061 0.0000229 -14.30980687 255.000 4.640 0.00000061 0.0000229 -14.30980687 270.000 4.640 0.00000061 0.0000229 -14.30980687 285.000 4.630 0.00002344 Undefined 300.000 | 4.630…