Monitor the rate of production of oxygen from hydrogen peroxide using manganese dioxide as a catalyst

Step 1

Set up apparatus as shown and bring the conical flask into the vertical position

Step 2

Start timer when manganese dioxide falls into hydrogen peroxide. Read volume of gas at half-minute intervals and repeat until reaction is done

Step 3

Plot graph of volume of oxygen vs. time

What is on the y-axis?

Volume of oxygen

What is on the x-axis?

Time

Appearance of manganese dioxide before use

Black powder

What are the products of the decomposition of hydrogen peroxide?

Water Oxygen

If hydrogen peroxide is ‘20 volume‘ what does it mean?

Certain volume of hydrogen peroxide would give off 20 times that volume when it decomposes

What property of oxygen allows collection over water?

Oxygen is only slightly soluble in water

Average rate (meaning)

Mean rate of reaction for the whole reaction

One everyday use of manganese dioxide

Manufacture dry batteries e.g. AA batteries

Draw a diagram of this experiement

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Draw a graph of this experiment finding the average rate and instantaneous rate

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