# Chemistry

Consider the reaction A+B->C+3D. A solution was prepared by mixing 50 ml of .001 M of A, 100 ml of .002 M of B, 10 ml of 1 M of C, and 75 ml of .0015 M of D. At equilibrium, the concentration of D was measured and found to be .0006 M. Calculate the equilibrium concentrations of A, B, C, and D. Calculate the equilibrium constant for the reaction.

1. total volume = 100 + 50 + 10 + 75 = 235 mL.

In the final solution at mixing and before equilibrium
(A) = 0.001M x (50/235) = ?M
(B) = 0.002M x (100/235) = ?M
(C) = 1M x (10/235) = ?M
(D) = 0.0015M x (75/235) = ?M

So you know at equilibrium (D) = 0.0006M.
Therefore, the reaction formed 1/3 * 0.0006M for C. Add that to (C) above.
(A) at equilibrium = initial concn - 1/3 * 0.0006 and (B) at equilibrium = initial concn B - 1/3 * 0.0006.
Plug those values into Keq expression and solve for Keq.

posted by DrBob222

First Name

## Similar Questions

One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within ±0.005 inch of
2. ### Chemistry-Dr.Bob

A solution is prepared by mixing 50.0mL of 0.001 M HCl and 10.0 mL of 0.200 M NaCl. What is the molarity of chloride ions in this solution? My work: (0.001 mol/L)((0.05 L)= 0.005 mol HCl (0.200 mol/L)(0.01 L)= 0.002 mol NaCl
3. ### chemistry

Hy Dr Bob222 this will be the last time I will bother you about this type of question. Can you please tell what I am doing wrong? This is the best answer I could come up with: Question: Strychnine, C21H22N2O2(aq) is a weak base
4. ### Chemistry

A solution is prepared by mixing 8 mL of .2 M Fe(NO3)3, 10mL of .001 M NaSCN, and 7 mL of .1 M HNO3 a. calculate the concentration of Fe3+ in the solution b. calculate the SCN- in the solution
5. ### chemistry

A solution is prepared by mixing 5.00 grams of compound Z (molar mass 15.00 g/mol) in 100.0 ml of water. The density of the solution is 1.09 g/ml. Calculate the molarity of the solution
6. ### chemistry

A solution is prepared by mixing 4.62 grams of potassium hydroxide in 1.00 L of water. After that, 250.0 mL of a 0.100 M solution of HCl is added to the solution. What is the resulting pH of the final mixture?