Show one sample calculation to find the Tf for a 52.0% mass solution (again, use the...
Show one sample calculation to find the Tf for a 52.0% mass solution (again, use the trendline from the molality graph). (Hint: convert 52.0% to correct units!)
The equation is Tf=0.485(m)+-0.134 where Tf is freezing temperature and m is molality.
I'm guessing you have to convert percent mass to molality but I don't know how to do that.
EDIT: It is a Ethylene glycol solution, so molar mass is 62.06.
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Show one sample calculation to find the Tf for a 52.0%
mass solution (again, use the...
Show one sample calculation to convert from % mass to molality. This is a ethylene glycol...
Show one sample calculation to convert from % mass to molality. This is a ethylene glycol solution. Mass % Ethylene glycol= 2.00, molality=0.32 mass %: 2= (0.50/25.01)x100 molality: 0.32=(0.50 x (1/62.06)) / ((25.01-0.50) x 1/1000)
The molar mass of a compound expresses the ratio of mass to moles Part A molar...
The molar mass of a compound expresses the ratio of mass to moles Part A molar mass- _mass in gr tert-Butyl alcohol is a solvent with a Kf of 9.10 °C/m and a freezing point of 25.5 °C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3°C number of moles This quantity can be determined experimentally by accurately measuring the mass of the sample and determining the corresponding...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier #4 (All unknowns are nonelectrolytes, soi-1) Determination of the freezing point of pure l-butyl alcohol: (Record time-temperature data on the next page) 29.62 1. Mass of empty test tube 2. Mass of test tube and t-butyl alcohol after determination of freezing point of pure t-butyl alcohol 50.25 20.71 3. Mass of t-butyl alcohol Determination of the molar mass of an unknown: (Record time-temperature data...
Show the title, formula, substitution, and solution for each calculation? I don't know how to cal...
show the title, formula, substitution, and solution for each calculation? I don't know how to calculate the answers that are already prefill in the boxes. Data Table A Unknown Letter W Mass of empty flask with Foil (g) 93.58 Mass of flask, foil and condensed liquid (g) 94.17 Mass of condensed gas (g) 187.75 Temperature (C) 100 Temperature (K) 373.15 Pressure (mmHg) 748.2 Pressure (atm) 0.984 Volume of gas (mL) 148 Volume of gas (L) 0.148 Molar mass calculated (g/mol)...
48.64 50. 91 57.94 58.89 Mass of large test tube Mass of test tube with acetic...
48.64 50. 91 57.94 58.89 Mass of large test tube Mass of test tube with acetic acid Mass of test tube + acetic acid + sample Mass of test tube + acetic acid + sample 2 C. Solution 2 C. Solution l Time C, Acetic Acid 57.48 40.3 33. 24.8 17.1 F12.5 9.8 57.2 38.4 24.8 13.2 10.9 G8.0 266 la 5 20.9 16. 6 16.7 14.3 10.0 0 0.5 1.0 1.5 2.0 2.5 5.7 4.2 3.9 3.1 2 2...
Find the molar mass of the unknown compound given the following information: A 1.216 g sample...
Find the molar mass of the unknown compound given the following information: A 1.216 g sample of an unknown compound was dissolved in 8.379 g of BHT BHT is a non-polar solvent with a k, = 6.83°C/m. The freezing point depression (AT) was measured as 3.30'C. Useful information AT, = Kim Hint: sole for molality and then use the mass of the solvent to find the number of moles of solute. If the rate constant for the reaction below is...
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600...
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600 M 0.900 M 0.300 M Which compound forms an electrolyte solution when dissolved in water? O C2H5OH C6H12O6 (glucose) O Nal O Cl2 A solution is saturated in H2 gas and LiCl at room temperature. What happens if the solution is warmed to 75 °C? Solid LiCl precipitates out of solution. Solid LiCl precipitates out of solution and gaseous H2 bubbles out of solution....
I'm struggling with this lab, need help with questions on page 3, explanations please. F11 FiB...
I'm struggling with this lab, need help with questions on page 3,
explanations please.
F11 FiB FIO R F9 FO FE FY F4 Name N E The Enthalpy of Neutralization of Phosphoric Acid As you have seen in previous experiments, a great deal can be learned by conducting an acid- base reaction as a titration. In addition, acid-base reactions can be observed and measured thermodynamically. In this case, the reaction is carried out in a calorimeter. If the temperature of...
just one example/demonstration! Data needed to be calculated is in highlighted in green boxes. And I...
just one example/demonstration!
Data needed to be calculated is in highlighted in green boxes.
And I highlighted in red an equation (not sure if thats what you
use to calculate it) And ignore the lab instructions on completeing
a graph!! I already know how to do that in excel, just curious how
Ln (relative rate) and 1/T in K^-1 is calculated by hand*
here is the rest of that lab leading up to the question as I
know its typically...
The molar mass of a compound expresses the ratio of mass to moles Part A molar mass- _mass in gr tert-Butyl alcohol is a solvent with a Kf of 9.10 °C/m and a freezing point of 25.5 °C. When 0.807 g of an unknown colorless liquid was dissolved in 11.6 g of tert-butyl alcohol, the solution froze at 15.3°C number of moles This quantity can be determined experimentally by accurately measuring the mass of the sample and determining the corresponding...
Freezing Point Depression: Determination of the Molar Mass of an Unknown Substance Laboratory Record Unknown Identifier #4 (All unknowns are nonelectrolytes, soi-1) Determination of the freezing point of pure l-butyl alcohol: (Record time-temperature data on the next page) 29.62 1. Mass of empty test tube 2. Mass of test tube and t-butyl alcohol after determination of freezing point of pure t-butyl alcohol 50.25 20.71 3. Mass of t-butyl alcohol Determination of the molar mass of an unknown: (Record time-temperature data...
48.64 50. 91 57.94 58.89 Mass of large test tube Mass of test tube with acetic acid Mass of test tube + acetic acid + sample Mass of test tube + acetic acid + sample 2 C. Solution 2 C. Solution l Time C, Acetic Acid 57.48 40.3 33. 24.8 17.1 F12.5 9.8 57.2 38.4 24.8 13.2 10.9 G8.0 266 la 5 20.9 16. 6 16.7 14.3 10.0 0 0.5 1.0 1.5 2.0 2.5 5.7 4.2 3.9 3.1 2 2...
Find the molar mass of the unknown compound given the following information: A 1.216 g sample of an unknown compound was dissolved in 8.379 g of BHT BHT is a non-polar solvent with a k, = 6.83°C/m. The freezing point depression (AT) was measured as 3.30'C. Useful information AT, = Kim Hint: sole for molality and then use the mass of the solvent to find the number of moles of solute. If the rate constant for the reaction below is...
What is the molar concentration of potassium ions in a 0.300 MK2CO3 solution? 0.150 M 0.600 M 0.900 M 0.300 M Which compound forms an electrolyte solution when dissolved in water? O C2H5OH C6H12O6 (glucose) O Nal O Cl2 A solution is saturated in H2 gas and LiCl at room temperature. What happens if the solution is warmed to 75 °C? Solid LiCl precipitates out of solution. Solid LiCl precipitates out of solution and gaseous H2 bubbles out of solution....
I'm struggling with this lab, need help with questions on page 3,
explanations please.
F11 FiB FIO R F9 FO FE FY F4 Name N E The Enthalpy of Neutralization of Phosphoric Acid As you have seen in previous experiments, a great deal can be learned by conducting an acid- base reaction as a titration. In addition, acid-base reactions can be observed and measured thermodynamically. In this case, the reaction is carried out in a calorimeter. If the temperature of...
just one example/demonstration!
Data needed to be calculated is in highlighted in green boxes.
And I highlighted in red an equation (not sure if thats what you
use to calculate it) And ignore the lab instructions on completeing
a graph!! I already know how to do that in excel, just curious how
Ln (relative rate) and 1/T in K^-1 is calculated by hand*
here is the rest of that lab leading up to the question as I
know its typically...
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