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A buffer is prepared by adding 3.00 g of sodium acetate (Formula Wt.=82.03g/mol) to 200 ml of 0.20 M acetic acid (Molec. Wt. = 60.053g/mol, Ka = 1.85x10-5). What will be the pH of this buffer? Assume adding the salt does not change the total volume.
NaOH is added to K2CrO4 and K2Cr2O7 separately in test tubes and a color change is noted.
The weak acid AH4 has how many buffering regions. Can anyone explain how to approach this type of problems
for each of the three types of polarization,briefly describe the mechanism by which dipoles are induced and/or oriented by the action of an applied electric field. For solid lead titanate, gaseous neon, diamond
Suggest an indicator that could be used to provide an end point for the titration of the first proton in
The distribution constant for the metabolite between ligroin and an aqueous solution is 11.8. You extract 50.0 mL of an aqueous solution that is 0.0350 M in the metabolite with 25.0 mL ligroin. What is the concentration of the metabolite in the aq..
How many milliliters of 0.105 M HCl are needed to completely neutralize 60.0 mL of 0.108 M Ba(OH)2 solution?
A gas expands and does P-V work on the surroundings equal to 283 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system
It is found that 6.4 x 10-4 g of Ag3AsO4 dissolves per 500 mL of aqueous solution at a given temperature. Calculate the solubility product for Ag3AsO4. Ag3AsO4 (s) 3 Ag+(aq) + AsO4-3(aq)
If 125 cal of heat is applied to a 60.0 g piece of copper at 25.0 C, what will the final temperature be? The specific heat of copper is 0.0920 cal/(g.C}) .
A sugar water mixture contains 45.8g of sugar and 108.5 g of water. What is the percent by mass of sugar and the percent by mass of water in the solution?
explain it is important to cerry out the determining the molar mass of a volatile liquid by the dumas method
A helium-filled balloon at sea level has a volume of 2.5 L at 0.989 atm and 33°C. If it is released and rises to an elevation at which the pressure is 0.900 atm and the temperature is 29°C, what will be the new volume of the balloon?
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