PART G: DECOMPOSITION REACTION. AB A+B THIS REACTION MUST BE PERFORMED IN THE FU

Question

PART G: DECOMPOSITION REACTION. AB A+B THIS REACTION MUST BE PERFORMED IN THE FUME HOODI Decomposition reactions are characterized by one substance breaking down to two or more simpler substances. Reaction: Decomposition of hydrogen peroxide (H202) 1. Add small amount (using the tip of the spatula) of manganese dioxide, MnO2, in a large test tube. Remember, a catalyst is not used up in the reaction and its formula is written above the arrow. 2. Add one drop of 0.1 M HCI. Tap it. 3. Hold the test tube with a test tube holder. Add 1-2 mL of hydrogen peroxide to the test tube 4. Place your thumb over the mouth of the test tube to trap the gas. Wait a few seconds. 5. Test the gas that is being given off by placing a glowing splint into the test tube. (Your partner will light a wooden splint and extinguish the flame. Place the glowing splint into the test tube. the wooden splint will ignite, indicating the presence of oxygen as a product of the decomposition reaction) 7. Write a complete balanced equation for this reaction. Balanced Equation Products Reactant(s)

Explanation / Answer

7)

Here the reactant is H2O2

And products are H2O and O2 gas

Balanced chemical equation =

MnO2

2H2O2-----------------> 2H2O + O2

Hence the decomposition of Hydrogen peroxide verifies the decomposition reaction where one compound breaks into two or more simpler substances .

here water and oxygen gas is produced

and evolution of oxygen gas is detected by placing the splint in test tube Oxygen ignite it

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