Investigation of aqueous electrolytic cells.For this experiment, we are to test an aqueous solution, choosing from the four selections given: sodium chloride, copper sulfate, copper chloride and hydrogen sulfuric acid.

Authors Avatar

Chinese International School

Yr 11 MYP Science

Cells and Electricity

Mr. T. Fryer

Medora Choi 11AM

9th January, 2008

Investigation into aqueous electrolytic cells

Introduction:

For this experiment, we are to test an aqueous solution, choosing from the four selections given: sodium chloride, copper sulfate, copper chloride and hydrogen sulfuric acid. The purpose of this investigation is to investigate one factor that affects the output of an aqueous electrolytic cell. We were given a double lesson to plan the experiment and another for us to collect data. I decided that the electrolytic cell I will study is copper chloride by measuring the mass of the carbon stick, the electrode. We are also given a supply of power units to help us investigate into aqueous electrolytic cells.

Aim:

My aim for this experiment is to investigate whether the amount of voltage in a circuit can affect the amount of solid discharged.

Hypothesis (including reason):

If the voltage increases, the amount of solid discharged from the electrode will increase as well.

I predict that the solid discharged from the electrode will increase as the voltage increase in the circuit because as the voltage goes higher, the more energy will be produced and the faster the solid will be discharged from the electrode. And hence, the mass of the electrode will gradually become heavier as the voltage increases.

Join now!

Variables:

Independent variable:  voltage

For the independent variable, it is the voltage, because I have to change it as we finish the experiment every time, meaning the input of the experiment. It is also a manipulated variable, which is a factor or condition that changes intentionally manipulated by the investigator to observe the effect. Since we want a big difference of mass change, we decided to go from 2amps to 12amps.

Dependent variable:                mass of electrode

For the dependent variable, it is the mass of electrode, because this is what I will be measuring, meaning the output of ...

This is a preview of the whole essay