Lab# 9 - 2H2O2 + K+ +I- 2H2O + O2 Exothermic RXN...

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2H 2 O 2 + K + +I - →2H 2 O + O 2 Exothermic RXN Hypothesis: The greater the concentration of the catalyst, the faster the reaction will go. First, we poured 25ml of a 5 weight % of hydrogen peroxide solution in 4 different beakers. We also added 75ml of H20 to dilute the peroxide. We labeled the beakers: 1g KI, 0.5g KI and 0.25g KI. Next we placed the first beaker on the hot plate and added the stirrer to start agitation. The speed was set at a constant five. The initial temperature of the first beaker was 22.5ºC. We had to determine how long it took for the bubbling to stop. This entire process was repeated for each of the remaining beakers. The initial temperature of the second beaker was 23 ºC and 22 ºC for the third. Analysis and Observation: For the first trial, what we found was that at49 ºC, the solution was clear and after few minutes, the temperature began to decline. After minutes, the temperature was at 55 ºC. Another observation was that, when we first began
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