Question

2. (a) Consider the reaction between en the reaction explaining all the terms used in the equation O and Kino, and write a general rate equation for and write a genera (b) Write the rate expression using the disappearance of KMnOwith time. (c) A student adds 5.00 mL of 0.755 M of oxalic acid to 6.00 mL of distilled water. To this solution the student adds on another 1.00 mL of 0.135 M potassium permanganate. The total volume of the reaction mixture is 12.0 mL. The elapsed time for the reaction is 242 1) Calculate initial concentration of oxalic acid in the reaction mature 2) Calculate the initial concentration of potassium permanganate in the reaction mixture 3) Which of the two reactant is the limiting reactant? 4) Calculate the initial rate of the reaction

Answer 1

a) The reaction that occurs is:

4H2C2O4 + 2KMnO4 = 8CO2 + K2O + Mn2O3 + 4H2O

b) You have the expression of speed:

Rate = k * [H2C2O4] ^ m * [KMnO4] ^ n

c) 1) The initial acid concentration is calculated:

[Acid] = C1 * V1 / V2 = 0.755 M * 5 mL / 12 mL = 0.315 M

2) Permanganate concentration is calculated:

[KMnO4] = 0.135 M * 1 mL / 12 mL = 0.011 M

3) The limit reagent is KMnO4.

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