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Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
The pH of a white vinegar solution is 2.29. This vinegar is aqueous solution of acetic acid with a density of 1.09 g/mL. What is the mass percentage of acetic acid in the solution?
When solid iodine is introduced into an evacuated vessel at 25 degrees Celcius, some of the iodine sublimes. Predict how the enthalpy, entropy, and free energy change in the system
Determine the number of moles of oxygen that react completely with 8.0 moles of C2H6 based on the following balanced equation.
During a work-up, we are asked to interrupt vacuum, "drizzle" cold methanol over the crude product, then reestablish vacuum. What is the purpose of this step and why does the methanol need to be cold
if 77.0 mL of .150 M HCl (aq) is needed to neutralize all the NH3(g) from a 2.25 gram sample of organic material, calculate the mass percentage of nitroge in the sample.
2 mol of a compound is allowed to react in a foam coffee cup that contains 101 grams of water. the reaction caused the temperature of the water to rise from 21 to 24.7 C. What is the enthalpy of the reaction?Assume that no heat is lost to the surr..
Does ammonium chloride added to water produce a simple solution, does the ammounium chloride dissociate or does a chemical reaction occur resulting in a new set of compounds.
Determine the final concentration if a 144-mL portion of that solution is diluted using water of 143 mL ?
The solubility of silver phosphate in pure water and Na3PO4, Silver Phosphate, Ag3PO4, is an ionic compound with a solubility product constant Ksp of 206 x 10 ^ - 18.
A lithium atom is contained in a cubic well 10 nm on a side. (a) Calculate the energy (joules) required to achieve the transitions from the ground state to the first excited state for this system
How many mL of medicine X would you need to give a 100 g dose?
Calculate the mass of sodium hydroxide that must be added to 1.00 L of 1.00 M HC2H3O2 to double the pH of the solution (assume that the added NaOH does not change the volume of the solution)
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