EXPERIMENT 5 - H2O2 and yeast 1) Yeast contains an enzyme...

EXPERIMENT 5 - H2O2 and yeast 1) Yeast contains an enzyme that catalyzes (speeds up) the breaking down of hydrogen peroxide to produce water and oxygen gas. Classify this reaction: and 2) Which of the substances produced caused the ember on your wooden stick to glow brighter? Oxygen 3) Write the balanced equation for this reaction. Make sure you include states, keeping in mind that you used a 3.0% solution of hydrogen peroxide. 4) Assign oxidation states to each atom in each reactant and product, writing the oxidation states above the atoms in your balanced equation above.

Transcript

00:01 Hello students we will discuss a problem from general chemistry and the problem says that we are having yeast and everyone of us know about it it produces enzyme and the enzyme of the yeast is such that it catalyzes a reaction it catalyzes a particular reaction and the reaction is h2o2 decomposes into h2o and o2.

00:36 Based upon this particular reaction we have to reply certain questions and the very first question that has been asked is classify this reaction what type of reaction is this this is the example of redox reaction in this reaction reduction as well as oxidation is taking place and this particular reaction is example of this proportionation reaction this is the example of disproportionation reaction it means from a single compound one element out of two is undergoing oxidation and another one is undergoing reduction let's move to the second question and the second question is which of the substances produced among the products cause the amber of your wooden stick to glow brighter who supposed burning isn't it oxygen so the answer is oxygen it make the ember on our wooden stick to glow brighter third question is write the balanced equation for this reaction so the balanced equation is 2 h2 o2 is equal to 2h2o plus o2 and they have also asked to write the states so this is an aqua solution water is liquid and oxygen is gas and the final question is assign oxidation state to each element in the reactant and among the product and also show which one is oxidized and which one is reduced it is very interesting to discuss the structure of hydrogen peroxide among hydrogen and oxygen.

02:39 Hydrogen is less electronegative.

02:42 So the oxidation state or the charge distribution is like this in h2o2.

02:47 And when the reaction happens, one of the oxygen that is present into minus one oxidation state change itself into water.

02:56 And water is like this where every hydrogen is plus 1.

03:01 And oxygen is minus 2...

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