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A 2.50 mL buffer solution is .250 mol in acetic acid and .250 mol in sodium acetate. (Ka=1.8x10 to the -5).
A. What is the initial pH to the buffer solution?
B. What is the pH after addition of 0.010 moles of HCl?
What mass of NH4Cl should the student dissolve in the solution to turn it into a buffer with pH =8.77
how would each affect the calculated molecular mass of the solute?
Now if your lab partner needed 7.030 x 1019 molecules of Sodium cyanide (NaCN), how many milligrams would you need to weigh out?
If you prepare a liter of 0.02 M acetic acid and 0.01 M sodium acetate, what will be the pH if the pKa of acetic acid is 4.76? b) If you add 1 ml of 5 M NaOH to the 1 liter above, what will be the new pH and the change in pH?
The crystalline form of silver (Ag) is composed of face-centered cubic unit cells. If the density of silver is 10.48 g/cm3 at room temperature,
Suppose a sample of solid hydrogen is held under an external pressure of 0.030 atm and heated from 5 to 300 K. What phase change(s), if any, will occur?
A piece of metal with a mass of 169 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 38 mL. What is the density of the metal?
Caffeine has a distrubution coefficient of 8.4 for methylene chloride/ water. How much caffiene will be extracted from a 200 mL cup of Turkish coffee (250 mg caffeiene) by 100 mL of methylene chloride?
Calculate the molecular weight of sulfur if 35.5 grams of sulfur dissolve in 100.0 grams of CS2 to produce a solution that has a boiling point of 49.49 oC.
An excess of aqueous silver nitrate, AgNO3 was added to precipitate the bromide ion as silver bromide. If 8.00g of the soluble salt produced 2.00g of silver bromide, what was the mass percentage of the chloride in the sample?
How much heat is associated with the burning of 2.14 g of methane in the following unbalanced reaction
A basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
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