O KINETICS AND EQUILIBRIUM Calculating equilibrium composition from an equilibrium constant Suppose a 500. mL flask is filled with 1.1 mol of Cl,, 0.20 mol of HCl and 0.80 mol of CCI,. The following reaction becomes possible: Cl, (2) +CHCI, (g) - HCI(g) + CC1, (2) The equilibrium constant K for this reaction is 9.65 at the temperature of the flask. Calculate the equilibrium molarity of HCl. Round your answer to two decimal places. M

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Chapter12: Chemical Equilibrium
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O KINETICS AND EQUILIBRIUM
Calculating equilibrium composition from an equilibrium constant
1/5
Suppose a 500. mL flask is filled with 1.1 mol of Cl,, 0.20 mol of HCl and 0.80 mol of CCl,. The following reaction becomes possible:
Cl, (2) + CHCI, (g) → HCI(s) +CCI, (g)
The equilibrium constant K for this reaction is 9.65 at the temperature of the flask.
Calculate the equilibrium molarity of HCl. Round your answer to two decimal places.
M
II
Transcribed Image Text:O KINETICS AND EQUILIBRIUM Calculating equilibrium composition from an equilibrium constant 1/5 Suppose a 500. mL flask is filled with 1.1 mol of Cl,, 0.20 mol of HCl and 0.80 mol of CCl,. The following reaction becomes possible: Cl, (2) + CHCI, (g) → HCI(s) +CCI, (g) The equilibrium constant K for this reaction is 9.65 at the temperature of the flask. Calculate the equilibrium molarity of HCl. Round your answer to two decimal places. M II
O ACIDS AND BASES
Calculating the composition of a buffer of a given pH
4/5
A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 × 10 . What mass of NH,Br
should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56?
You may assume that the volume of the solution doesn't change when the NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2
significant digits.
Transcribed Image Text:O ACIDS AND BASES Calculating the composition of a buffer of a given pH 4/5 A chemistry graduate student is given 450. mL of a 1.20M ammonia (NH,) solution. Ammonia is a weak base with K, = 1.8 × 10 . What mass of NH,Br should the student dissolve in the NH, solution to turn it into a buffer with pH =9.56? You may assume that the volume of the solution doesn't change when the NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
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