General Chemistry

Questions & Answers

2. What is the pH of a solution containing a hydrogen ion concentration of 3.0x10-4M? а


5. Write the anode and cathode reactions for a galvanic cell that utilizes the reaction: Ni+2Fe¹ → Ni²+ + Fe²+


Procedure PART A: CALIBRATION OF A CALORIMETER


1 2 3 4 5 Using the data collected in Part A, determine the Calibration Factor for the Calorimeter. (i.e. the Calibration Constant/Calibration Factor). From the Graph created in your results in Part A, describe the quality of the Calorimeter. Calculate the AH for both reactions that were performed in Parts B and C. Calculate the AH for the reactions performed in Parts B and C using the specific heat capacity of water. Give a reason explaining the differences obtained using an electrical calibration as compared to using the specific heat capacity of water. Compare the AH calculated in question 3 for the reactions performed in Parts B and C with their expected values. (You need to find these expected values. Include references of where these values were obtained). Give two reasons explaining the differences obtained experimentally compared to the expected values.


One cube is made of silver and has side length 82.0 cm and one cube is made of an unknown substance with side length 35.0 cm. The mass of the silver cube is 1.89 times larger than the mass of the unknown cube. The density of silver is 10.49 g/cm3; what is the density of unknown cube?


Multiple Choice:


2. Give an example of:


1. Describe a condenser? Why is used?


4. Draw the Lewis structure of Na2SO4. Assign all formal charges.


3. Why does the temperature of the boiling solution have to be measured over a specific time interval, and not the moment you observe boiling?


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