Y = 0.0004x + 0.011 R² = 0.75921 1. Use the equation to predict the concentration of unknown etha...
y = 0.0004x + 0.011
R² = 0.75921
1. Use the equation to predict the concentration of unknown ethanol.
2. Predict the concentration of ethanol in a pure ethanol solution. You can do this using the density of pure ethanol (789g/L) and the volume (200uL) to calculate the mass of ethanol. MM = 46.06844g/mol.
The equations you will need to use: d=m/v, n=m/MM, c=n/v.
Once you have calculated the concentration (c), this is the concentration of ethanol in a pure ethanol solution. You will now need to determine the concentration of ethanol in your unknown sample (eg, 5% ethanol solution => cX0.05 = concentration of ethanol in original sample).
Homework Answers
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Y = 0.0004x + 0.011 R² = 0.75921 1. Use the equation to predict the concentration of unknown etha...
DATA SHEET Overall Stoichiometric Equations 1. Results and Observations 2. Unknown No.:l Concentration of standard Na2S&O3...
DATA SHEET Overall Stoichiometric Equations 1. Results and Observations 2. Unknown No.:l Concentration of standard Na2S&O3 solution, M 0.020(0 Trial 3 Trial 2 Trial 1 13.22 33.97 o.0.20 1311 Initial burette reading, mL 13.09 Final burette reading, mL (0.21 Volume of NAS2O3 used, mL Amount of NA2S2O3 used, mol Amount of Cu2 in unknown sample, mol L0.00 10. 00 10.00 Volume of original Cu solution used, mL in original solution, M Concentration of Cu Average Concentration of Cu2, M Procedure...
Solutions & Electrolytes Name Date Lab Meeting 1. What is the concentration of ethanol (C2H60) solution...
Solutions & Electrolytes Name Date Lab Meeting 1. What is the concentration of ethanol (C2H60) solution that was prepared by dissolving 50-500 g of ethanol into water to a final volume of 750,0 mL? Assume the solution has a density of 1.20 g/mL a. % (m/m) b. M cal equations Predict if the following solutions would conduct
Need help on the 2 highlighted parts on bottom and need double check on all "calculated...
Need help on the 2 highlighted parts on bottom and need double
check on all "calculated data"
Data Collection a) Making working NaOH stock (15 points) Original stock concentration of NaOH (aq): 10 M Volume of stock used (ml): 20 mL Use M1V1 = M2V2 to calculate concentration of Working NaOH solution (M): 2 b) Raw Data (20 points) Trial 1 Trial 2 20.000 mL 20.000 mL Volume of Unknown acid before addition of phenolphthalein (mL Volume of Unknown acid...
Concentration of FeSCN2+ = 0.0565 mol/L 11. The volume of the cyanide solution that was found...
Concentration of FeSCN2+ =
0.0565 mol/L
11. The volume of the cyanide solution that was found at the scene was 20 mL. Based on the calculated concentration of FeSCN2+ in the unknown solution, determine the concentration of potassium cyanide, KCN, in the original poison solution. Show all your Hint: One mole of KCN will produce one mole of FeSCN*. Assume that all of the KCN in the poisoned solution reacted to form FeSCN2+. Assume that the 20 mL of original...
Need help on the 2 highlighted parts towards bottom and help check the "calculated data" Data...
Need help on the 2 highlighted parts towards bottom and help
check the "calculated data"
Data Collection a) Making working NaOH stock (15 points) Original stock concentration of NaOH (aq): 10 M Volume of stock used (ml): 20 mL Use M1V1 = M2V2 to calculate concentration of Working NaOH solution (M): 2 b) Raw Data (20 points) Trial 1 Trial 2 20.000 mL 20.000 mL Volume of Unknown acid before addition of phenolphthalein (mL Volume of Unknown acid after addition...
Could you please help me with the questions I got wrong? If you dont know the...
Could you please help me with the questions I got wrong? If you
dont know the answer please do not comment, leave it for another
expert to answer because I really need to get this done , Thank you
so much ^^ There's also a guide to the calculations but i dont get
it
Table view List view Sample 2 Sample 3 Table 5. Calculations for concentration of acid solution Sample 1 [1] Volume of acid (mL) 25.0 25.0 25.0...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the...
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the Part II Data Table and the equation on page 2 for the absorbance assay at 280 nm. Hint: Convert the molar concentration (M or moles/liter) of BSA from absorbance assay at 280 nm method to mg/mL, assume that the molecular weight of BSA = 66.5 kDa [7 points 6500 g/mol Post-lab 10 Report Form: Determination the Concentration of a Protein You must show your...
Need help please SOLUTION MAKING in water. Calculate the amount of NaCl you need to weigh...
Need help please
SOLUTION MAKING in water. Calculate the amount of NaCl you need to weigh out. 1 (a). You need 500mL of 15% (w/v) NaCl 1(b) What approximate volume of water would you dissolve the NaCl in? Please give a range of volumes. 1(c). Assuming that adding the NaCI to your original volume of water caused the volume to increase by 50mL before you added additional water to reach your final volume, what is the DENSITY of your final...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for part II and the equation you obtained from part I to calculate the concentration of FeSCN In the cuvette. Show your calculations with formulas and report the result. 2. Since KSCR was limiting reactant, you may consider amounts of FeSCN and SCN to be the same. KSCN was diluted from the original unknown concentration in the bottle (c1) when the required by the protocol...
DATA SHEET Overall Stoichiometric Equations 1. Results and Observations 2. Unknown No.:l Concentration of standard Na2S&O3 solution, M 0.020(0 Trial 3 Trial 2 Trial 1 13.22 33.97 o.0.20 1311 Initial burette reading, mL 13.09 Final burette reading, mL (0.21 Volume of NAS2O3 used, mL Amount of NA2S2O3 used, mol Amount of Cu2 in unknown sample, mol L0.00 10. 00 10.00 Volume of original Cu solution used, mL in original solution, M Concentration of Cu Average Concentration of Cu2, M Procedure...
Solutions & Electrolytes Name Date Lab Meeting 1. What is the concentration of ethanol (C2H60) solution that was prepared by dissolving 50-500 g of ethanol into water to a final volume of 750,0 mL? Assume the solution has a density of 1.20 g/mL a. % (m/m) b. M cal equations Predict if the following solutions would conduct
Need help on the 2 highlighted parts on bottom and need double
check on all "calculated data"
Data Collection a) Making working NaOH stock (15 points) Original stock concentration of NaOH (aq): 10 M Volume of stock used (ml): 20 mL Use M1V1 = M2V2 to calculate concentration of Working NaOH solution (M): 2 b) Raw Data (20 points) Trial 1 Trial 2 20.000 mL 20.000 mL Volume of Unknown acid before addition of phenolphthalein (mL Volume of Unknown acid...
Concentration of FeSCN2+ =
0.0565 mol/L
11. The volume of the cyanide solution that was found at the scene was 20 mL. Based on the calculated concentration of FeSCN2+ in the unknown solution, determine the concentration of potassium cyanide, KCN, in the original poison solution. Show all your Hint: One mole of KCN will produce one mole of FeSCN*. Assume that all of the KCN in the poisoned solution reacted to form FeSCN2+. Assume that the 20 mL of original...
Need help on the 2 highlighted parts towards bottom and help
check the "calculated data"
Data Collection a) Making working NaOH stock (15 points) Original stock concentration of NaOH (aq): 10 M Volume of stock used (ml): 20 mL Use M1V1 = M2V2 to calculate concentration of Working NaOH solution (M): 2 b) Raw Data (20 points) Trial 1 Trial 2 20.000 mL 20.000 mL Volume of Unknown acid before addition of phenolphthalein (mL Volume of Unknown acid after addition...
Could you please help me with the questions I got wrong? If you
dont know the answer please do not comment, leave it for another
expert to answer because I really need to get this done , Thank you
so much ^^ There's also a guide to the calculations but i dont get
it
Table view List view Sample 2 Sample 3 Table 5. Calculations for concentration of acid solution Sample 1 [1] Volume of acid (mL) 25.0 25.0 25.0...
1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of...
4. (a) Determine the experimental concentration of protein in the unknown solution in mg/mL using the Part II Data Table and the equation on page 2 for the absorbance assay at 280 nm. Hint: Convert the molar concentration (M or moles/liter) of BSA from absorbance assay at 280 nm method to mg/mL, assume that the molecular weight of BSA = 66.5 kDa [7 points 6500 g/mol Post-lab 10 Report Form: Determination the Concentration of a Protein You must show your...
Need help please
SOLUTION MAKING in water. Calculate the amount of NaCl you need to weigh out. 1 (a). You need 500mL of 15% (w/v) NaCl 1(b) What approximate volume of water would you dissolve the NaCl in? Please give a range of volumes. 1(c). Assuming that adding the NaCI to your original volume of water caused the volume to increase by 50mL before you added additional water to reach your final volume, what is the DENSITY of your final...
Part II. Determination of Unknown SCN concentration. 0.387 9=3663.24-0.0427 1. Use the absorbance you measured for part II and the equation you obtained from part I to calculate the concentration of FeSCN In the cuvette. Show your calculations with formulas and report the result. 2. Since KSCR was limiting reactant, you may consider amounts of FeSCN and SCN to be the same. KSCN was diluted from the original unknown concentration in the bottle (c1) when the required by the protocol...
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