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11 ) During your dialysis experiment you used 5 mL of a 0.1 % solution of...
In an experiment involving diffusion and osmosis, you are given dialysis tubing, beakers of pure water,...
In an experiment involving diffusion and osmosis, you are given dialysis tubing, beakers of pure water, and 2 solutions: dissolved starch, and diluted iodine. You are told that when starch and iodine come into contact with each other, the starch turns a deep blue-black. Your problem is to find out whether the dialysis tubing is permeable to (lets molecules through) either iodine and/or starch. How could you find out? (Choose the only one of the following possibilities that is accurate.)...
Experiment 2: Diffusion Concentration Gradients and Membrane Permeability Data Tables Table 2: Indicator Reagent Data Indicator...
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...
1. A 19.6 gram sample of KCl is used to make a 275. mL KCl solution....
1. A 19.6 gram sample of KCl is used to make a 275. mL KCl solution. What is the molarity of the KCl solution? 2. A chemist has a bottle containing 0.25 M CuCl2. How many milliliters of this solution should the chemist use to add 12.0 grams of CuCl2 to her reaction? 3. In a saturated solution of the ionic compound sodium sulfate, Na3PO4 all of the water molecules are involved in the hydration process. some solid Na3PO4 is...
Warner Chemical Equilibrium Page 6 of 11 Assuming the density of your initial acid solution is...
Warner Chemical Equilibrium Page 6 of 11 Assuming the density of your initial acid solution is 1.0 g/ml, what is the concentration (in molarity) of the diluted acetic acid solution? Show your work and include units. Hint: An initial 45% w/w solution (w/w means 4.5 g of acid per 100 g of solution) of CH3COOH (MW - 60.05 g/mol) was diluted by placing 0.5 mL into 80 mL of water to produce a final diluted solution with a total volume...
1) If you have a 5 molar solution and a diluted 0.1 molar solution. What is...
1) If you have a 5 molar solution and a diluted 0.1 molar solution. What is the ratio between these two? 2) If you want to prepare 50ml medium containing 5% FBS. What is the volume of FBS you have to add? 3) If the concentration in your original medium is 50.000 cells per ml and you add 1ml of this medium to 4ml fresh medium without cells. How many cells per ml are in these 5ml of new medium?...
Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH=...
Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH= 9.00, from a concentrated ammonia solution (16%w/w, d=0.98g/mL) and solid ammonium chloride (97% w/w). (MW of NH3 = 17.031 g/mol and FW of NH4Cl = 53.491 g/mol and pKa NH4+/NH3 =9.24). How many grams of the solid ammonium chloride do you need? Consider two decimal places for the answer.
Pour 2.5 mL of the 1M glucose (C6H12O6) solution from the flask into the 100 mL...
Pour 2.5 mL of the 1M glucose (C6H12O6) solution from the flask into the 100 mL volumetric flask. Use the “dilution equation” to determine the volume in mL for the required 0.025M solution, given that the original solution is 1M and you used 2.5 mL Fill the volumetric flask to the 100 mL mark with distilled water. Note: The flask already contains a volume of 2.5 mL. 1. Compute the volume of the diluted 0.025 M solution. 2. What volume...
During the experiment you titrated the aspirin solution with 17.00 mL of 0.1022 M sodium hydroxide....
During the experiment you titrated the aspirin solution with 17.00 mL of 0.1022 M sodium hydroxide. How many grams of aspirin were in the tablet used?
10.) If given 290mL of a diluted glucose solution 0.75% (w/v) that was made by adding...
10.) If given 290mL of a diluted glucose solution 0.75% (w/v) that was made by adding 30mL of a stock glucose solution and 260mL of water, what was the original concentration of the stock glucose solution expressed as grams/100mL or % (w/v). 13.) If you have 2mL of a 2.5 X 10-7 M [H+] and it is diluted by adding 3mL of H2O, what is the new concentration of your solution? 14.) Suppose you are given a 50% (w/v) solution...
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that...
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that is 2.0%w/v? Do NOT include any units, just answer with the NUMBER of grams, for example: 4.2 or 13 or 220. Type your response What is the new concentration, if solvent is added to 20.0 mL of a solution that is 4.0%w/v, until the total volume of the solution is 100.0 mL? (DO NOT include any units with your answer.) Type your response 25...
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...
Warner Chemical Equilibrium Page 6 of 11 Assuming the density of your initial acid solution is 1.0 g/ml, what is the concentration (in molarity) of the diluted acetic acid solution? Show your work and include units. Hint: An initial 45% w/w solution (w/w means 4.5 g of acid per 100 g of solution) of CH3COOH (MW - 60.05 g/mol) was diluted by placing 0.5 mL into 80 mL of water to produce a final diluted solution with a total volume...
How many grams of potassium bromide are needed to prepare 300.0 mL of a solution that is 2.0%w/v? Do NOT include any units, just answer with the NUMBER of grams, for example: 4.2 or 13 or 220. Type your response What is the new concentration, if solvent is added to 20.0 mL of a solution that is 4.0%w/v, until the total volume of the solution is 100.0 mL? (DO NOT include any units with your answer.) Type your response 25...
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