This document outlines an experiment to determine how the mass concentration of salt affects electrical conductivity. It lists the necessary materials, including a beaker, water, salt, electrical conductivity tester, timer, and balance. The independent variable is the mass concentration of salt, and the dependent variables are volume, mass, conductivity, and time. Temperature must be kept constant. The procedure involves adding increasing amounts of salt to 100ml of water, measuring the volume, mass, time until dissolution, and conductivity. Results will be recorded in a table and graphed to compare mass concentration to conductivity.

1. Electrical Conductivity
Materials
1. 250ml beaker
2. 100 ml water
3. Electrical conductivity tester
4. NaCl
5. Timer
6. Goggle
7. Balance
8. May be more
Design
1. How does the mass concentration of salt affect the electrical conductivity?
Independent Variable: Pressure
Dependent Variables: Volume, Mass, conductivity, time
Controlled Variable: Temperature
2. Pressure: In this experiment, 100 ml of water will be poured into 250 ml beaker, so in
this case pressure is totally independent.
Volume: In order to calculate, you need to read the volume each time you increase salt.
Time: As soon as you pour the salt into the water, begin your timing and you may insert
your conductivity also.
Mass: You must weigh the mass of salt, which will be divided by the volume, to get the
value of the mass of the concentration.
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2. Conductivity: This is the most vital part; you need to record the conductivity data on
your table each time you repeat.
Temperature: Temperature is the one variable that you want to keep constant as possible
as you can, because as result of the temperature change the reaction rate will vary also.
Procedure
1. Be ready with your materials.
2. Put 100ml of water in 250ml beaker.
3. Weight 10 g of salt and add to the water. (Stir little bit) Don’t forget to time the rate
of reaction.
4. After they dissolve completely, insert the conductivity tester into the water and
record the data in Volt or depending on what kind of tester you use.
5. Record the volume, mass, Time and Volt into your table.
6. Follow the same procedure but water, which must be constant, and salt, which you
must increase by 10 g , should be fresh.
Dependent Mass Volume Mass Time Volt
concentration
Change
/difference
Mass concentration = mass/volume
Since my original goal is to investigate how the mass concentration effects the ability
of the electric to conduct, I can compare the two of them on the Grape.
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