To see what affects the rate of reaction between HCL and Mg

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CHEMISTRY COURSEWORK


Aim

To see what affects the rate of reaction between HCL and Mg

Scientific information

Mg + 2HCl (r) MgCl2 + H2

Magnesium + Hydrochloric acid (r) Magnesium Chloride + Hydrogen

( s ) ( aq ) ( aq ) ( g )

Magnesium will react with hydrochloric acid, because it is higher in the reactivity series that hydrogen. When the two chemicals react a displacement reaction will take place and the magnesium will displace the hydrogen in the hydrochloric acid forming magnesium chloride and hydrogen gas.

Apparatus

Safety glasses

Conical flask

Measuring cylinders x3

Water Bath

Water

Hydrochloric Acid

Delivery tube

Strips of Magnesium

 


Method

  • Firstly take a conical flask and place in the required amount of HCL and H20.
  • Fill a water bath and fill it with water and place in the bath a measuring cylinder to measure out the amount of H2 collected.
  • Connect the delivery tube from the flask to the water bath and place it under the measuring cylinder.
  • Carefully cut a strip of Mg to five cm lengh.
  • Then place it in the conical flask.
  • Make sure that all the H2 bubbles are collected.
  • Every five seconds record the gas collected
  • Repeat this for five times doing each experiment twice to make a fair test.
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Ways that I could record my experiment

There are several way which I could record my experiment.

The possible ways are as follows:

  • The weight before and after the experiment

I could put the conical flask with 25cm2 of hydrochloric acid onto a set scales and record the weight of it. I could then drop a piece of magnesium into the conical flask and measure the decrease in weight different times

  • To see how long the magnesium takes to dissolve,

Seeing how long eit takes for the magnesium to dissolve. The problem with this ...

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