Investigation of the Effect of Concentrations of Sucrose Solutions on Potato Tuber Cells

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Investigation of the Effect of Concentrations of Sucrose Solutions on Potato Tuber Cells

Aim:

To find the rate of reaction between different concentrations of

Sodium Thiosulphate and a constant concentration of Hydrochloric acid

and to follow the speed at which Sulphur is formed.

Hypothesis:

Rate of reaction is determined by the concentration of reactants. The

hypothesis is that the rate of reaction of Sodium Thiosulphate with a

constant concentration of Hydrochloric acid will increase as the

concentration of Sodium Thiosulphate increases.

Equipment used:

q Click To PreviewConical flask

q Large measuring cylinder (50cm3) - for Water and Sodium Thiosulphate

q Small measuring cylinder (10cm3) - for Hydrochloric acid.

q Pipette (optional)

q Distilled water

q Beakers- 1 beaker should be labelled with Sodium Thiosulphate and

the other should be labelled with Hydrochloric acid. This is so the

two do not get confused for one another.

q Thermometer - to measure room temperature

q Stop clock

q Paper with a cross marked clearly on it

q A supply of Hydrochloric acid and Sodium Thiosulphate

Click To Preview Click To Preview

Click To Preview Click To PreviewSafety:

q Wear goggles to protect your eyes

q Wear a lab coat to ensure that your clothes stay clean

q Wear gloves (optional)

q Wash your hands after the experiment

Procedure:

Preliminary work:

Table 1

Concentration of Sodium Thiosulphate (mol/l)

Volume of Sodium Thiosulphate (mol/l)

Volume of Distilled Water (cm3)

Volume of Hydrochloric Acid (concentration- 0.5 cm3)

0.05

10

40

5.0

0.10

20

30

5.0

0.15

30

20

5.0

0.20

40

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