A 1.536 sample of K2SO4 is dissolved in 20.0 g of water (Kf = -1.86oC/m)). The solution freezes at -2.07oC. What is the van’t Hoff factor, i, for this solution? Submit your answers below. Save and upload your calculations to the ” Midterm Exam Required Work & Partial Credit” assignment to earn 1pts after you submit this exam. Be sure to number your answers and use the correct units.

To receive up to 26 CREDIT POINTS FOR CALCULATIONS as well as Partial Credit please upload your work to the Midterm Exam Required Work & Partial Credit assignment after you submit your Midterm. Do not forget to number your answers. Do not upload anything here.

After the following solutions reacted at the conditions different from your experiment,  the measured absorbance of the solution was  0.345. Table 1 Volume of 0.0020 M Fe(NO3)3 solution Volume of 0.0020 M KSCN solution Volume of 0.300 M HNO3 solution [Fe3+] initial [SCN-] initial [Fe(SCN)2+] equilibrium [Fe3+]  equilibrium [SCN-]  equilibrium Ка 5.00 mL 3.00 mL 2.00 mL Use the provided data to calculate initial concentrations and the calibration equation from your lab report build the RICE Table and calculate equilibrium concentrations and equilibrium constant. Include your answers in the space provided below.   To receive full credit, create a RICE table and upload it along with your calculations to the Exam Calculations after you submitted this exam  Save and upload your RICE Table and calculations to the “Midterm Exam Required Work  & PC” assignment to earn 10 more points (6 pts – calculations and 4 pts – Rice Table) after you submit this exam. Be sure to number your answers and use the correct units. [Fe3+] initial: [SCN-] initial: [Fe(SCN)2+] equilibrium: [Fe3+]  equilibrium: [SCN-]  equilibrium: Ка:

Calculate the volume of 0.650M stock of Fe3+solution you need to dilute with deionized water to prepare 150.0 mL of 0.025M solution of Fe3+(aq). Submit your answers below. Save and upload your calculations to the ” Midterm Exam Required Work & Partial Credit” assignment to earn 2pts after you submit this exam. Be sure to number your answers and use the correct units.

A 1.550 g sample of a molecular organic compound is dissolved in 10.0 g of benzene and the freezing point is lowered by 2.13oC. What is the molecular weight, in Da, of the organic compound? (Kf = -5.12oC/m). Submit your answers below. Save and upload your calculations to the ” Midterm Exam Required Work & Partial Credit” assignment to earn 1 pts after you submit this exam. Be sure to number your answers and use the correct units.

A 1.367 g sample of Fe(NO3)3 is dissolved in 20.0 g of water (Kf = -1.86oC/m). The solution freezes at -2.54oC. What is the van’t Hoff factor, i, for this solution? Submit your answers below. Save and upload your calculations to the ” Midterm Exam Required Work & Partial Credit” assignment to earn 1pts after you submit this exam. Be sure to number your answers and use the correct units.

On the illustration of a generic cell for Co/Ga electrodes immersed in their salt solutions Use numbers from the picture to identify(5 pts) :  the anode:  the cathode: the direction of cations  the direction of anions the direction of the electrons flow.  Co2++2e−⟶Co     Eo= −0.28V Ga3++3e−⟶Ga     Eo= −0.549V Use the given electrode potentials above to write the following (10 pts): the anode half-reaction (2 pts) the cathode half-reaction (2 pts) the balanced overall net equation the cell voltage produced (4 pts) the standard cell notation (2 pts) Calculate Eocell(5 pts) Submit your answers below. Save your work  and upload to the ” Final Exam Required Work & Partial Credit” assignment to earn full credit after you submit this exam. Be sure to number your answers and use the correct units. ANSWERS:  

How many grams of glucose,  dissolved in 350.0 g of water are needed to make a 1.55 m solution? Save and upload your calculations to the ” Midterm Exam Required Work & Partial Credit” assignment to earn 2pts after you submit this exam. Be sure to number your answers and use the correct units.

To receive up to 10 CREDIT POINTS FOR CALCULATIONS as well as Partial Credit please upload your work to the Midterm Exam Required Work & Partial Credit assignment after you submit your Midterm. Do not forget to number your answers. Do not upload anything here.

Los verbos reflexivos: El día ocupado de Katrina. Read over the description of Katrina’s busy day as a university student. Then, decide which verb best completes each statement. Finally, type the correct form of the verb in the space provided. (2 pts. each: 1 pt. for correct verb, 1 pt. for correct conjugation; 12 pts. total) MODELO: (Yo) Me despierto [acostarse / despertarse / sentarse] a las 6:00 de la mañana porque tengo clase a las 8:00.