The enthalpy of formation of acetylene
Please see the attached Word document to view the problem. The enthalpy of formation of acetylene is 226.6 kJ/mol. a. Draw a correct Lewis structure for acetylene.
An ammonium ion selective electrode responds to both NH4+ and H+, but not to NH3. (pKa=9.244 for NH4+) A) What pH conditions must be imposed to ensure the electode properly represents toe activity of NH4+ (SHOW ALL MATH). B) Why is the ionic strength an important factor when using this or any ISE? How can you compensate f ...continues
A spectrophotometric assay was to be carried out on a compound ε = 5000. The stock solution of standard had been made with a concentration of 0.0203M. Given a 1.000cm path length and a desired absorbance around 0.4-0.5, by what factor should the stock solution be diluted? (SHOW ALL MATH) B) Exactly how would you best ...continues
A 25 mL sample of .13M HCl is mixed with 15mL of .24M NaOH. The pH of the resulting solution will be nearest. The answer is 11.9 but I need the step by step solution.
H2O yield in mL from Na2CO3 + 2HCl
I have worked this problem many different ways and cannot seem to set it up correctly. Na2CO3 + 2HCl => 2NaCl + CO2 + H2O I have 36.53g of sodium carbonate reacting with 32.94g of hydrchloric acid. I am trying to find how many mL of water are produced from this reaction.
Consider the electrode/water based solution interface Pt/Ag+ (0.01M), Cd^2+ (0.01M), HClO4 (1M) . Write the equation (s) for the electrode reaction(s) that occur at applied potentials of: 1.4 V, 0.6 V, 0.2 V, and -0.5 V (NHE) Show step by step please.
Calorimitery and the First Law of Thermodynamics
I recently performed a lab experiment dealing with the properties of a coffee cup calorimeter. One of the procedures involved measuring the temperatures of liquid water in 2 coffee cups (1 hot water, 1 cold water) for 3 minutes, and then mixing them into one cup and recording the temperature for another 3 minutes. I have sever ...continues
Calorimetry Involving Heat of Solution of NaOH(s)
I recently performed a lab experiment dealing with the properties of a coffee cup calorimeter. One of the procedures involved measuring the temperature of 50mL water placed in a calorimeter for 3 minutes, and then adding NaOH(s) pellets and measuring the temperature for 4 more minutes. I have several temperature measurements, ...continues
What will be the exact potential difference in the following concentration cells? a) Ag/Ag+ (0.1 M) // (0.01 M) Ag+/Ag b) Ag/Ag+ (0.000001 M) // (0.00001 M) Ag+/Ag Show step by step please
Consider a galvanic cell consisting of Cu wire immersed in a solution containing 10^-10 M Cu(NO3)subscript 2 and 1 M HNO3 and Ag wire immersed in 10^-2 M AgNO3 and 1 M HNO3. What is the equation for the elctrode reaction and under what circumstances will the processes in the system will stop?
