What is the role of manganese dioxide in the preparation of oxygen gas in the laboratory?​

The manganese dioxide is a catalyst. That means it speeds up the decomposition reaction of H2O2 → H2O + O2. Also, being a catalyst,manganese dioxide is not consumed or chemically altered during the reaction. ... a1) Take a photo of your setup while it is producing oxygen.

So what you would do is go through and add 3 teaspoons(tsp) 6 times because of the 6 tablespoons(tbsp). which will give you an answer of 18. another way is to multiply 3x6=18.

Show an image of the data (˵¯͒ བ¯͒˵)