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1. How does one perform pH analyzer calibration?
2. Why is calibration necessary for a pH analyzer?
3. What is the difference between 2 point and 3 point calibration?
4. Please describe a procedure for sample collection as explained by the Lab technician.
5. Why are some of the pH measurements different between methods?
6. Please describe the procedure for preparing the pH analyzer for storage.
7. What is the effect of temperature on pH?
8. Of the pH measurement methods studied in this lab, which is the most accurate? Why?
The oxide of which of the following metals should have the greatest lattice energy?
A sample of a complex salt, with ideal composition Ni(NH3)6(NO3)2, was analyzed for nickel by dissolution in slightly acidic solution and precipitation as the dimethylglyoximate, Ni(DMG)2.
Calculate the pH of a solution made by adding 40. g of sodium acetate, NaCH3COO, to 21 g of acetic acid, CH3COOH, and dissolving in water to make 700. mL of solution
A solution is prepared by dissolving 12.9 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 15.00 mL sample of this stock solution is added to 53.00 mL of water.
The IR spectrum of 1- hexyne shows a sharp absorption peak near 2100 cm-1 owing to the CC triple bond stretch. The IR spectrum of 3- hexyne shows no absorption in this region because
A 45-g piece of ice at 0 degree C is added to a sample of water at 8 degrees C. All of the ice melts and the temperature of the water decreases to 0 degree C. How many grams of water were there in the sample
Determine the molar mass of each of the following gases: a.) 0.82g of a gas that occupies 470mL at 0C and 1.00 atm (STP). b.) 1.48g of a gas that occupies 1.45L at 0C and 760 mmHg (STP). c.) 1.48g of a gas that occupies 1.30L at 695 mmHg and 20.0C..
One beaker contains pure water, another contains salt water, and another contains sugar water. How can you tell the which beaker is Which?
Write the formula for the ion formed when each of the following elements loses its valence electrons?
assume that due to dwindling supplies of crude oil and natural gas the us embarks on a plan to implement the hydrogen
a certain protein was found to contain 0.639% zinc by mass. Determine the minimum molecular mass of the protein.
A gas occupying a volume of 263 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
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