Question

1. Why is the starch indicator added to the reaction solution? 2. Consider the following balanced chemical reaction: 2 MnO, (aq) + 5 H2O2(aq) + 6 H*(aq) → 2 Mn2+ (aq) + 5 O2(g) + 8 H,O(1) a. A student wrote the following rate law for this reaction: Rate = k [MnOz]”[H202]*[H+]6 Is this correct? Explain. b. Briefly describe what must be done to obtain the correct rate law. 3. Define the following terms: a. Rate: b. Rate law: c. Rate constant, k:

Answer 1

SA I. Starch is used as the indicator and added to the reach solo lucause of he show/ Incentify the Presence of todine. It changes the son to 'Lank lule colour which is cluce to foomaßion of Stench- rodbine coniflex 2 Civen encach i 2 Mnoglalt 50% (aq) +GHT(all 2012 (ap) +50 0 +8Holes (al Rate = F [Mno, J² [H2O2 JS Eurjó Glui ii the wrong rate low A general law can la shown Rabe = K [Memory Jº (napr Jb [n+jC intiene , b, c is Other that they stachionchic Coefficient (6) There are many onefhools to find out the order of а) i Hit Itaal Metleed. Дило от , [А], - Lo1, -к, Р 1&torch, Kaf = fo CAJ, Putting values & check, which give same value of rate const will be order of oceach ii) Groflikel reeflood. by calling a equation for noth oreles. Plot the care for 1 minust If tune is straight line it will be gewo order of greaca CATA

ii) Half life method ya) A.1.17 ex) x The Tony to you bye Define a) Rates The rease of a change in Concentration of any leccefant or forduced oliviced ley its stoichio metric coefficient to concentrated termo Eigt 2063) +33(g) =((g) +2019) lesef gegen (Y) = -= A[A] => 4181290 b) Rate Law : It is the mathematical Exfreuions that describe the relationship between the nate of chemical lecacion and conceukalon gets Gractants, ad ALDT Of 22 c) Rate constant :- Il ei defined as the reate of reach when the Concetration of each recortant is taken as Unily!