Chemical kinetics Chemical Kinetics| 53 NOTEBOOK TIP It is easy to switch axes a

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Chemical kinetics
Chemical Kinetics| 53 NOTEBOOK TIP It is easy to switch axes accidentally. When plotting a graph, be sure to properly label (with units) and double check each axis. Speaking of units-always include clear units in your notebook DISCOVERY MATERIALS Equipment . 5-beaker . 4 125 mL. Erlenmeyer flask . 2- 10 mL graduated cylinder clock or stopwatch . pan for ice . 2 water baths per lab room I-thermometer Chemicals 0.1 M ammonium persulfate. .0.005 M sodium thiosulfate, Na S:O 2% starch solution . 0.2 M potassium iodide, KI .0.2 M potassium chloride, KCI 0.1 M ammonium sulfate, (NHahSO HAZARDS Wear appropriate PPE. Thermometers are not stirring rods. PROCEDURE Part A: Reaction Order All glassware must be clean and dry to get the correct concentrations and volumes. Obtain solutions needed for this experiment from the reagent cart in clean, dry, labeled beakers. Only obtain the amount of solution you need for the experiment do not waste chemicals. Prepare the reaction mixtures in two different 125 mL. Erlenmeyer flasks as indicated below, measuring the volumes carefully using graduated cylinders (accurately record the notebook). Assume volumes are additive, and ignore the minor contribution from the drops of starch. volumes in your Mixture I Mixture 2 Mixture 3 KI KCi Flask a SO 10 mL. 0 mL 5 mL 5 mL 5 mL 10 mL 10 mL. 0 mL 5 mL 10 mL 5 mL Flask 2 NHo)SO. 0ml 0 ml When you have Flask 1 and Flask 2 prepared for Mixture 1, pour the contents of Flask 2 into Flask 1, then swirl to mix. Start measuring the time as soon as the two mixtures are poured together. Measure the elapsed time, in seconds, required for the blue color to appear, then record

Explanation / Answer

Question 1:

Therefore,all the 4 factors influence the rate of a chemical reaction.So,select all.

a) It is true,because the reaction speed increases whe more reactants are present

b) this is true, because more area, more interaction, more collisions, more speed

c) this is true, because the catalyst is used to facilitate the reaction

d) this is true, because if you increase T, you increase K, if oyu decrease it, you slow it down

  

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