1. Why is the starch indicator added to the reaction solution? 2. Consider the following balanced chemical reaction...
Question 8 Step 1: H,02 + I +10- +H,0 Step 2: H,02 + 10 + H2O + O2 +I" The mechanism for a chemical reaction is shown above. Which of the following statements about the overall reaction and rate laws of the elementary reactions is correct? The chemical equation for the overall reaction is 2 H202 + I and the rate law for elementary step 2 is rate = k[H,02][10 + 2 H2O + O2 +I , ]. + H2O...
The following mechanism, proposed for the decomposition of hydrogen peroxide is composed of 2 elementary steps: H2O2(aq) + I'(aq) > H2O(l) + 10 (aq) 10 (aq) + H2O2(aq) -> H2O(l) + O2(g) + I'(aq) The rate law predicted by the mechanism is slow fast a) rate = k [H2O2) b) rate =k [H202][I] c) rate =k [H2O2][10] d) rate = k [H202) [1]
(a) Consider the following chemical reaction in acidic aqueous solution: ?MnO4- + ?H2O2+cH+ → ?Mn2++?O2+?H2O Write down (but do not solve) equations that we could use to balance this reaction by Gaussian elimination. Specify what is being “conserved” in front of each equation. (b) Suppose we let ? = 1. Could the reaction then be balanced with exactly one set of numbers ?, ?, ?, ?, ?? (Y/N)
Consider a different titration for this exercise. Potassium permanganate (KMn04) is the titrant and hydrogen peroxide (H202) the analyte according to the following balanced chemical equation. 2 MnO45 H202 + 6 H+ »2 Mn2+ 5 02 + 8 H20 (a) What is the stoichiometry of MnO4 to H202? 8:3 5:2 2:1 1:1 1:2 O2:5 3:8 (b) Complete the following table for this titration. Data Table P3: Titration of hydrogen peroxide with potassium permanganate concentration of MnOa 0.554 M volume H202...
Chemical Kinetics Kit for AP Chemistry Student Guide d. Is it likely that this reaction occurs in one step? Explain. 2. A student would like to determine the orders of the reaction for an iodine clock reaction that occurs in three steps 3r(aq)+ H,O:(aq) + 2H'(aq )-,(aq) +2H 2O0) slow I(aq) + 25,0,(aq) 3r(aq) + S40(aq) 21, (aq) + starch-starch-I" complex + r(aq) fast fast Write the rate law for this reaction, using variables in place of the exponents a...
1. Write the balanced chemical reaction for the reaction of zinc and hydrochloric acid. 2. How does temperature affect the reaction rate? Briefly explain. 3. How does concentration affect the reaction rate? Briefly explain. 4. Write the balanced chemical equation for the decomposition of hydrogen peroxide.
1. For the following reaction, H(aq) +1 -2(aq) + 1/2H2O2(aq) → the following reaction data was obtained: 42 12 (aq) + H20 1-1 (mol/L) H2O2(mol/L) Rate(mol/L*min) Expt. #1 0.015 0.030 0.0022 Expt. #2 0.035 0.030 0.0052 Expt. #3 0.055 0.030 0.0082 Expt. #4 0.035 0.050 0.0087 A. Determine the order of the two reactants(1'1 and H202) and the over all order. His a catalyst and is not included in the rate expression. B. Write the rate expression for the reaction...
2 H2O2(aq) + 2 H2O(l) + O2(g) 5. Hydrogen peroxide decomposes according to the equation above. a. An aqueous solution of H2O, that is 6.00 percent H,O, by mass has a density of 1.03 g ml. Calculate each of the following. (i) The original number of moles of H2O, in a 125 ml sample of the 6.00 percent H2O2 solution (ii) The number of moles of O,(g) that are produced when all of the H2O2 in the 125 mL sample...
Consider the following UNBALANCED reaction IN ACIDIC SOLUTION: Fe2+(aq) + MnO4-(aq) ⟶ Fe3+(aq) + Mn2+(aq) a. (5) Species that is oxidized (be specific – i.e. identify which atom and if there are multiple atoms with different charges, identify the correct one) b. (5) Species that is reduced (same instructions as above) c. (10) Full Balanced oxidation ½ reaction (‘full’ means with regard to mass (atoms) and charges.) d. (10) Full Balanced reduction ½ reaction e. (9) Complete Balanced Reaction Using...
Consider the following balanced chemical reaction: 2 C2H40 + 5 O2 -> 4CO2 + 4H20 This chemical reaction is a a) double-replacement reaction b) single-replacement reaction c) decomposition reaction d) synthesis reaction e combustion reaction