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Problem- If 79.0mL of 0.127 mol/L NaOH(aq) and 50.0mL of 0.189 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=5.55 at 25oC.
Give reasons or calculations to sustain your answer, please answer with detail step by step.
The following reaction has achieved equilibrium. Predict the effect on the formation of phosphorous pentachloride (increase, decrease or no effect) for the stated changes to the system
if i have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 liter what will the new pressure inside the piston be?
in an electron microscope electrons are accelerated to great velocities. calculate the wavelength in m of an electron
Ammonium phosphate is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid with ammonia . What mass of ammonia is consumed by the reaction of of phosphoric acid? Round your answer to significant digits.
A chemist burns 160 g of aluminum in oxygen to produce aluminum oxide. She produces 260 g of aluminum oxide. Write a balanced equation and calculate the theoretical yield and percent yield.
All numerical answers must be reported to the correct number of significant figures. A piece of mineral believed to be galena (PbS) with a mass of 744.5 g displaces 48.6 mL of water. What is the density of the mineral
what is the minimum amt of ethnaol needed to recrystallize a 2.0gsample of cmpd x?after recrystallization of the 2.0g
if a raindrop weighs 63 mg on average and 5.1 105 raindrops fall on a lawn every minute what mass in kg of rain falls
Consider the two gaseous equilibria- SO2(g) + 1/2O2(g) SO3(g) K1 2SO3(g) SO2(g) + O2(g) K2 The values of the equilibrium constants K1 and K2 are related
Determine the minimum excitation energy of an electron constrained to rotate in a circle of radius equal to the Bohr radius (the value of Bohr predicts for the electron-hydrogen distance in the n=1 state) around a fixed point.
a 1.00 liter solution contains 1.00 mol of weak acid HX. After 0.60 mol of Oh- is added to this olution, the pH of the solution is 4.00. Calculate the Ka for the acid HX.
A certain reaction between a weak acid (boric acid) and a strong base (sodium hydroxide) has an equilibrium point at a pH of approximately 11. From what you know about indicators, which indicator would be best to use to tell when neutralization ha..
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