Electrical conductivity of salt water

[Guest anaoum]

hello,

 

i am designing an experiment to see the relationship between the electrical conductivity of salt water and the temperature of the salt water.

 

can some one help me by giving a good and accurate way of measuring the conductivity.

 

thanks

[YT2095]

you`ll need an Ameter, a peice of kit that allows you to read current flow, most good digital multi-meters have a current (Amps) setting on them.

 

put this in series with your power supply, and gently heat your salt water with a thermometer in the liquid.

 

then write down the meter reading for every degree C rise in temp. you can then use this data to plot a chart

[5614]

if you repeat the experiment remember that salt greatly increases the electrical conductivity of water so add the same amount each time.

 

useful equation would be:

voltage = current x resistance

or

current = voltage/resistance

or

resistance = voltage/current

[YT2095]

or just apply Ohms law *Sigh*

[Lance]

Better yet, just break out your handy dandy multimeter and turn it to its resistance setting.

[Lance]

Also, dont forget that the distance between the probes will vary the resistance.

[YT2095]

cor blimey, you`ll be taking into account local heating of the electrodes next and making demands that a magnetic stirrer be used to dispate this

[boxhead]

hello' date='

 

i am designing an experiment to see the relationship between the electrical conductivity of salt water and the temperature of the salt water.

 

can some one help me by giving a good and accurate way of measuring the conductivity.

 

thanks[/quote']

 

digital multimeter with temperature scale is the best solution.

[YT2095]

We`de already established that dude

[boxhead]

We`de already established that dude

 

oh i am sorry.

[YT2095]

no worries, it does pay to read a thread before posting though

[5614]

it does pay to read a thread before posting though

if i read it 5 times how much do i get?

[YT2095]

a lower probability of making an ass of yourself for the sake of NOT reading it, and no points added for the fact you had to read it 5 times as that shows a lacking in cognitive and mental retention abilities, but hey, it`s you `puter and inet time

[5614]

damn, i was hoping there was some cash involved

[YT2095]

cash, how common and cheap!

 

now then, Back on Topic, or I might just have to pay Sayo to do nasty, horrible and deplorable things to your account here! ))

[Tetrahedrite]

You don't actually have to do this experiment, conductivity at different temperatures (and concentrations) can be calculated using the Nernst Equation.

[Lance]

You don't actually have to do this experiment, conductivity at different temperatures (and concentrations) can be calculated using the Nernst Equation.

 

You dont "need" to do 99% of the things they make you do in school.