Saturday, April 13, 2013

Rates of reactions coursework (GCSE)

Rate of reaction

The Effect of concentration on the reaction between atomic number 12 and hydrochloric sour.

Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g)

Aim:

In this experiment I am going observe and come in the reaction between magnesium and different concentrations of hydrochloric back breaker.

Prediction:

I think that the laid-back concentrations of acid such as 1.0 and 0.8mols we have the most quick reaction and let turned more gas a lot quicker. The weaker concentrations such as 0.2 will let off a smaller amount of CO2 because there is non much acid for the magnesium to react with.

Equipment:

        Eye protection

        Hydrochloric acid (1mol/dm3)

        Magnesium ribbon

        Distilled water

        Conical flask

        Delivery tube

        Water trough

        Measuring Cylinders to invite gas, 100cm3

        Stopwatch

Method:

1.         Firstly I will get the required concentrations touch on up using a measuring cylinder to make sure the concentrations are right.

2.         I will then depend up 0.1g of magnesium ribbon.

3.         I will then conduct the magnesium to the first concentration and use a taking into custody watch to record the amount of gas for 3 transactions taking 20 second intervals.

4.         I will do this for all the concentrations.

5.         Once all the results for the concentrations have been recorded I will be finished.

How to make up the concentrations:

Concentration of acid          lot of concentration cm3         Hydrochloric acid         Distilled Water

1.0         20cm3         20cm3         0cm3

0.8         20cm3         16cm3         4cm3

0.6         20cm3         12cm3         8cm3

0.4         20cm3         8cm3         12cm3

0.

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2         20cm3         4cm3         16cm3

Results:

Volume of gas at time (cm3)

Concentration of acid         0

        20         40         60         80         100         long hundred         140         160         180

1.0cm3         0         25         44         62         74         81         89         92         94         96

0.8cm3         0         7         15         21         27         34         40         46         51         55

0.6cm3         0         4         10         17         25         32         39         46         50         54

0.4cm3         0         2         4         7         10         12 ...

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