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In a titration, 25.0 mL of 0.154 M HCl was added to 45.0 mL of 0.213 M ammonia (NH3). What is the pH at this point? (Kb of NH3 = 1.8 × 10-5 )
A buffer, consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system.
A sample of gas (24.2 g) initially at 4.00 bar was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was ________ bar.
Bonding in some solids does not fit neatly into one of the four categories. Explain why the bonding in Na2CO3 is not purely ionic.
What volume of 0.200M Hydrochloric acid must combined to 250mL of 0.300M C8H7NaO3 to produce a buffer of solution with a pH of 3.37?
If 0.327 moles of H2S effuses in 462 seconds, how many seconds would it take for the same number of moles of CH3Cl to effuse?
Given chemical reaction is used to produce electricity in lead storage battery that used in automobiles generally.
We add excess Na2CrO4 solution to 16.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.380 grams.
if the freezing point of a 0.107 m CH3COOH solution is -0.200°C, calculate the percent of the acid that has undergone ionization.
A sealed balloon is filled with 2.20 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 210. torr and the temperature is -32°C. What is the change in volume of the balloon as it ascends from 1.00..
Compare the amount of .200 moles of KOH needed to neutralize 50 mL of .200 moles of HNO3 with the amount of .200 moles of KOH needed to neutralize 50 mL of .200 moles of CH3COOH. Is the volume of KOH more, less or the same.
A solution contains 1.0 x 10-5 M Na3PO4. Calculate the minimum concentration of Ag+ that would cause precipitation of solid Ag3PO4.
A room of volume of 2 cubic meters is initially at 19 C and 101 kPa. A block of dry ice (solid carbon dioxide) is dropped into the room and then the room is sealed (air tight)
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