# Chemistry Problem

posted by .

At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4.
2BrCl <----> Br2 + Cl2

A solution was prepared with the following initial concentrations: [BrCl] = 0.0482 M, [Br2]= 0.0307 M, and [Cl2]= 0.0277 M.

What will their equilibrium concentrations be?
How do i know when the change in concentration is +x or -x?

I tried-2BrCl<-->Br2 Cl2

.0482 .0307 .0277
-2x +x +x

and reverse too but it's wrong. Any ideas?

• Chemistry Problem -

You must have made a math error.
........2BrCl ==> Br2 + Cl2
I.......0.0482..0.0307..0.0277

First decide which direction the reaction will move? How? Qrxn.
Q = (0.0307)(0.0277)/(0.0482) = 0.0176 and compare this with Kc = 0.145. Q < K which means the fraction is too low in the numerator and too high in the denominator and that means the rxn must go to the right.
C.........-2x.......x.......x
E......0.0482-2x....x.......x

and solve for x. and 0.0482-2x.If you still have a problem post your work and I'll find the error.

## Similar Questions

1. ### Chemistry

The initial pressure for the compounds involved in the reaction shown were determined to be P(Br2(g)) = 0.5417 atm, P(Cl2(g)) = 0.6962 atm, P(BrCl(g)) = 0.3442 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if …
2. ### chemistry

Use the equation below to answer the questions that follow. Br2 + Cl 2 ⎯→ 2BrCl a. How many moles of BrCl form when 2.74 mol Cl2 react with excess Br2?
3. ### chemistry

Br2 + Cl2 ----> 2BrCl all estequiometicas con respecto a Cl2?
4. ### quemistry

Br2 + Cl2 ---> 2BrCl 1. FIND ALL THE REASONS ESTEQUIOMETRICAS WITH REGARD TO Cl2. 2. all the masses of Cl2 are needed to form 55g of BrCl. 3. all the grams of Br2 are needed to form 38g of BrCl. please I need help for this question …
5. ### CHEM:

The bond enthalpy of the Br−Cl bond is equal to ƒ¢H‹ for the reaction BrCl(g) ¨ Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br−Cl bond. Br2(l)--->Br2(g) ƒ¢H=30.91 KJ/mol Br2(g)--->2Br2(g) …
6. ### chemistry:)

The bond enthalpy of the Br–Cl bond is equal to DH° for the reaction BrCl(g)-> Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br–Cl bond. Br2(l)--->Br2(g) ÄH=30.91 KJ/mol Br2(g)--->2Br2(g) ÄH=192.9 …
7. ### chemistry:)

The bond enthalpy of the Br–Cl bond is equal to DH° for the reaction BrCl(g)-> Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br–Cl bond. Br2(l)--->Br2(g) ÄH=30.91 KJ/mol Br2(g)--->2Br2(g) ÄH=192.9 …
8. ### AP Chem

At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4. 2BrCl <----> Br2 + Cl2 A solution was prepared with the following initial concentrations: [BrCl] = 0.0482 M, [Br2]= 0.0307 M, and [Cl2]= 0.0277 M. What will …
9. ### chemistry

For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) equilibrium reaction arrow 2 BrCl(g) If 0.85 mol of Br2 and 0.85 mol Cl2 are introduced into a 2.0 L-container at 400. K, what will be the equilibrium concentrations of …
10. ### AP Chemistry

Hey guys stuck again! Bromine and chlorine dissolve in carbon tetrachloride and react to form BrCl: Br2 + Cl2--> 2BrCl (in CCl4) Under equilibrium conditions [Br2] = [Cl2] = 0.00430 M and [BrCl] = 0.0114 M. The addition of 0.100 …

More Similar Questions