Set up the apparatus as shown in the diagram. Half fill the trough or bowl with water. Fill the measuring cylinder with water. Make sure it stays filled with water when you turn it upside down., Measure 50 cm3 of 1.0 M hydrochloric acid using the other measuring cylinders. Pour the acid into the 100 cm3 conical flask., When you are ready, add a 3 cm strip of magnesium ribbon to the flask, put the bung back into the flask as quickly as you can, and start the stopwatch., Record the volume of hydrogen gas given off at 10 second intervals in a table., Continue timing until no more gas appears to be given off., Repeat steps 1-5 using 2.0 M hydrochloric acid..

Rates required practical method 2

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