Hello, I am so grateful for this video as I need to conduct an experiment for this topic at school, I was wondering if you could tell me what the dependent, independent, and constant variables are?
If you are a student doing a school science project, you can ask for help in the Ask an Expert forums on our website and one of our volunteers can help you figure this out: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro
The wire does not need to be exactly 24 gauge. 24 gauge works well because it's a good balance of stiffness - flexible enough that you can bend it around the straw by hand, but stiff enough to hold its shape. Much thicker or much thinner wires can be difficult to work with.
I was comparing different fluids and used a measuring cup to pour 1.5 cups of each fluid into a bowl. From your video, you said that more surface area of the wire immersed would increase the current, so I wanted to have the depth of the conductor assembly the same for all fluids tested.
You can use the same sensor as long as you take readings quickly and rinse it with distilled water in between tests. If you start to notice significant color change of the wire, you should make a new sensor.
why does my multimeter always read 1, i all ready change the scale of am, everything is well connected, it always reads 1 ( the type of 1 that means that the scale is too low or too high for measuring the am)
The straw needs to be non-conductive - do not use a metal straw or it will short out the sensor. The number of coils will affect the surface area exposed to liquid and therefore affect the conductivity measurement, but this will not matter as long as you keep the number of coils constant since you are making relative measurements between different liquids.
Me and my science partner were meant to buy your kit but he accidentally bought a different multimeter. It didnt come with copper wire so im wondering if you know what type of copper wire it is?
You need "bare" (uninsulated) copper wire to do this project, any thin flexible gauge will work well (meaning flexible enough that you can easily bend it with your hands, like 28 AWG). Do not buy "magnet wire" or "enamel-coated" wire because that has a thin layer of transparent insulation on it.
Hi, i am trying this experiment and i have set the multimeter knob to 200m, but it greatly contrasts with the reading in the video. I am getting about 0.7 for powerade at 20 degrees celcius
Your reading can depend on the geometry of your conductance sensor (the total surface area of wire submerged under the liquid and the spacing between the two wires), so your results may vary from what you see in our video. The important thing is consistency within your own experiment and the relative readings you get between different liquids you test.
Hi - you can't convert the milliamp measurements into a direct measurement of the amount of electrolytes, but you can make relative comparisons between different liquids by comparing their conductivity. Please see the link in the video description to the written instructions on our website for more details.
How can I figure out how many milligrams of electrolytes are in the drink because it says divide the milliamps by voltage but i don’t know if that’s electrolytes or something else
why not just stick the alligator clips in the water manually and forget the wire straw appartus? Seems like if you place them in the liquid at the same spots and depth you eliminate the whole straw copper contraption. Also even considering your set up the distance between the wires on the straw - will that make the measurement change the farther or bigger the straw is. Thats fine if it does it just means that your comparisons have to be done with the same configuration. Making one measurement with one sized straw will change using another sized straw with the same liquid? Thats a question not a statement. Interesting video thanks for posting
The wire can start to corrode over time so you want it to be replaceable - it's cheaper to replace a few inches of wire than to replace your alligator clips. Otherwise, yes, you're correct - you need to keep the amount of submerged wire and spacing between the wires constant between trials.
I did this experiment except with energy drinks and an orange juice. With my orange juice I used the 200milliamp feature and the reading on my multimeter can back as 21. Would I calculate the conductance by doing 21/9 or do 0.021/9?
See equation 1 in the project's introduction - conductance (siemens) = current (amps) / voltage (volts). So if you want conductance in siemens, you need to convert your current to amps first (0.021). If you keep current as milliamps, then your result will be in millisiemens. Either way is fine as long as you are consistent between different liquids.
Hi - please see the link in the video description, the written instructions on our website contain more information than what's presented in the video.
Hi - have you looked at the written instructions for the project, particularly Figures 3 and 4 in the procedure? www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#procedure
Please refer to our multimeter tutorial, you will need to adapt the procedure for your multimeter: www.sciencebuddies.org/science-fair-projects/references/how-to-use-a-multimeter
Please see the written procedure linked in the video description for more details. This procedure does not let you directly measure electrolyte content, but lets you make relative comparisons between liquids.
Hi - please see the FAQ section of the written instructions: www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#faq
For purposes of this project you can assume the voltage is 9V. In reality the battery's voltage will not be exactly 9V, but you would need a second multimeter to measure the voltage while simultaneously measuring current.
Hi - the milliamp measurements in this project let you make relative comparisons between liquids; you cannot directly convert them to an amount of electrolytes.
Hi, so on the website it says I need a 1k ohm resistor and while looking for one I found several, however some had different wattages and I was wondering if it has to be a specific wattage, for example a 1/4 watt or 1/8, or can it be any? Thank you.
Hi - long story short, 1/4W is probably the most common type but in this case a 1/8W resistor would be OK. The full explanation is that you need to make sure the power dissipated by a resistor does not exceed its wattage rating. To figure that out, first we calculate the current through the resistor using Ohm's Law - voltage = current x resistance or V = i*R. In this circuit we know V = 9 volts and R = 1,000 ohms. So i = 9V / 1,000 ohms = 0.009 amps. Next we calculate the resistor's power dissipation, power = current squared x resistance or P = i^2*R. That's P = (0.009)^2 x 1,000 = 0.081 watts (W), or 81 milliwatts (mW). That is well below 1/4 W (0.25W or 250mW) and also below 1/8W (0.125W or 125mW). While it isn't critical for this project, typically in engineering you want a "factor of safety" so you don't get *too* close to your maximum ratings, so if building a more permanent circuit in this case you'd probably go with 1/4W just to be safe. Hope that helps!
You can use the resistor to check whether you've blown the fuse in your multimeter, see the project FAQ: www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#question9
The masking tape is just used to put labels on different bowls. Please see the link in the video description for written instructions with more information.
A kit with all the parts you need for this project is available here: www.homesciencetools.com/product/electrolyte-sport-drink-sensor-science-kit/?aff=SB1
If you are having trouble with this project, you can ask for help in the Ask an Expert forums on our website: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro. You will need to provide more details about what exactly is not working.
If you are having trouble with this project, you can ask for help in the Ask an Expert forums on our website and we can provide more support: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro
Okay, thanks so much for the video! This was a very helpful instruction this year's science fair in Miami-Dade County. Have a amazing day!
Hello, I am so grateful for this video as I need to conduct an experiment for this topic at school, I was wondering if you could tell me what the dependent, independent, and constant variables are?
If you are a student doing a school science project, you can ask for help in the Ask an Expert forums on our website and one of our volunteers can help you figure this out: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro
Hi there, I was just wondering if the copper wire we use has to be 24 gauge.
The wire does not need to be exactly 24 gauge. 24 gauge works well because it's a good balance of stiffness - flexible enough that you can bend it around the straw by hand, but stiff enough to hold its shape. Much thicker or much thinner wires can be difficult to work with.
I was comparing different fluids and used a measuring cup to pour 1.5 cups of each fluid into a bowl. From your video, you said that more surface area of the wire immersed would increase the current, so I wanted to have the depth of the conductor assembly the same for all fluids tested.
You can use the same sensor as long as you take readings quickly and rinse it with distilled water in between tests. If you start to notice significant color change of the wire, you should make a new sensor.
If I get a certain amount of milliamps for a liquid in my data should i just write x amount of milliamps or do I convert it to another measurement?
Please see the written instructions on our website linked in the video description for calculations you can do with this measurement.
why does my multimeter always read 1, i all ready change the scale of am, everything is well connected, it always reads 1 ( the type of 1 that means that the scale is too low or too high for measuring the am)
You may have blown the fuse in your multimeter. See the FAQ in the written instructions (linked in the video description) for troubleshooting tips.
What does the numbers for each drink mean exactly? Is it the amount of electrolytes or something?
Please see the written instructions on our website (linked in the video description) for a more detailed explanation.
does the straw need to be plastic
also does the amount of coils affect the test?
The straw needs to be non-conductive - do not use a metal straw or it will short out the sensor. The number of coils will affect the surface area exposed to liquid and therefore affect the conductivity measurement, but this will not matter as long as you keep the number of coils constant since you are making relative measurements between different liquids.
@@Science.Buddies k thnks
Me and my science partner were meant to buy your kit but he accidentally bought a different multimeter. It didnt come with copper wire so im wondering if you know what type of copper wire it is?
You need "bare" (uninsulated) copper wire to do this project, any thin flexible gauge will work well (meaning flexible enough that you can easily bend it with your hands, like 28 AWG). Do not buy "magnet wire" or "enamel-coated" wire because that has a thin layer of transparent insulation on it.
How much liquid should I put in when doing this experiment? (in mL please)
Please see the link in the video description for instructions on our website!
Hi, i am trying this experiment and i have set the multimeter knob to 200m, but it greatly contrasts with the reading in the video. I am getting about 0.7 for powerade at 20 degrees celcius
Your reading can depend on the geometry of your conductance sensor (the total surface area of wire submerged under the liquid and the spacing between the two wires), so your results may vary from what you see in our video. The important thing is consistency within your own experiment and the relative readings you get between different liquids you test.
How would I good around converting the milliamperes into electrolytes
Hi - you can't convert the milliamp measurements into a direct measurement of the amount of electrolytes, but you can make relative comparisons between different liquids by comparing their conductivity. Please see the link in the video description to the written instructions on our website for more details.
How can I figure out how many milligrams of electrolytes are in the drink because it says divide the milliamps by voltage but i don’t know if that’s electrolytes or something else
This project doesn't give you the absolute amount of electrolytes in different drinks, it lets you compare the relative amount between drinks.
why not just stick the alligator clips in the water manually and forget the wire straw appartus? Seems like if you place them in the liquid at the same spots and depth you eliminate the whole straw copper contraption. Also even considering your set up the distance between the wires on the straw - will that make the measurement change the farther or bigger the straw is. Thats fine if it does it just means that your comparisons have to be done with the same configuration. Making one measurement with one sized straw will change using another sized straw with the same liquid? Thats a question not a statement. Interesting video thanks for posting
The wire can start to corrode over time so you want it to be replaceable - it's cheaper to replace a few inches of wire than to replace your alligator clips. Otherwise, yes, you're correct - you need to keep the amount of submerged wire and spacing between the wires constant between trials.
I did this experiment except with energy drinks and an orange juice. With my orange juice I used the 200milliamp feature and the reading on my multimeter can back as 21. Would I calculate the conductance by doing 21/9 or do 0.021/9?
See equation 1 in the project's introduction - conductance (siemens) = current (amps) / voltage (volts). So if you want conductance in siemens, you need to convert your current to amps first (0.021). If you keep current as milliamps, then your result will be in millisiemens. Either way is fine as long as you are consistent between different liquids.
Hey i was wondering if there was a scientific explanation about how this works as im doing this for a science project and need to know how it works
Hi - please see the link in the video description, the written instructions on our website contain more information than what's presented in the video.
Hi! I’m trying to do this for a science project, but i’m confused on what is actually connecting the two alligator clips together?
Hi - have you looked at the written instructions for the project, particularly Figures 3 and 4 in the procedure? www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#procedure
gatoradeBro thank you so much this helped me alot🎉🎉🎉
what sport drink did you use in the video?
We used Gatorade for the video but you can do this project with any sports drink.
@@Science.Buddies ok, thank you
My multimeter doesent have the 200m or 2, 2000m milliapms range. What should i do
Please refer to our multimeter tutorial, you will need to adapt the procedure for your multimeter: www.sciencebuddies.org/science-fair-projects/references/how-to-use-a-multimeter
do you need to use the copper wire or could you just stick in the alligator clips?
It would work with the alligator clips but they may corrode over time and the copper wire is easier to replace.
How do I convert this into electrolytes?
Please see the written procedure linked in the video description for more details. This procedure does not let you directly measure electrolyte content, but lets you make relative comparisons between liquids.
what measurements of copper wire should I buy
Please see the link in the written instructions for materials.
can you use jewelry copper wire or does it have to be uninsulated copper wire?
It’s has to be pure copper
You need uninsulated wire for this project.
@@Science.Buddies I couldn’t find 24 gauge anywhere so I purchased jewelry copper wire from Michaels and it didn’t work...
Gatorade? I am professor crocodile's teaching assistant, thank you very much
I have a question I followed everything but still the readings on my multimeter keep increasing on connecting the red wire so what exactly is wrong
Hi - please see the FAQ section of the written instructions: www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#faq
Hi, im trying to do this experiment, is the resistor needed?
The resistor is included in the kit so you can confirm that your multimeter's fuse isn't blown (see project FAQ linked in the description).
How does the equation work?
Hi - could you let us know which equation you're referring to?
@@Science.Buddies the conductance = amps divided by voltage. Is the voltage the 9v battery, or do you have to measure the volts?
For purposes of this project you can assume the voltage is 9V. In reality the battery's voltage will not be exactly 9V, but you would need a second multimeter to measure the voltage while simultaneously measuring current.
Why can't you use the continuance function on the multi-meter?
The continuity function just produces a loud beep when it detects continuity, it would not let you differentiate between different liquids.
what drink did you use?
The red liquid in this video is Gatorade but you can try it with any sports drink or juice.
How do I convert the miliamps to electrolytes
Hi - the milliamp measurements in this project let you make relative comparisons between liquids; you cannot directly convert them to an amount of electrolytes.
what should i explain about
What does the multimeter need to be set to
Please see the section of the video starting at 3:20.
Hi, so on the website it says I need a 1k ohm resistor and while looking for one I found several, however some had different wattages and I was wondering if it has to be a specific wattage, for example a 1/4 watt or 1/8, or can it be any? Thank you.
Hi - long story short, 1/4W is probably the most common type but in this case a 1/8W resistor would be OK. The full explanation is that you need to make sure the power dissipated by a resistor does not exceed its wattage rating. To figure that out, first we calculate the current through the resistor using Ohm's Law - voltage = current x resistance or V = i*R. In this circuit we know V = 9 volts and R = 1,000 ohms. So i = 9V / 1,000 ohms = 0.009 amps. Next we calculate the resistor's power dissipation, power = current squared x resistance or P = i^2*R. That's P = (0.009)^2 x 1,000 = 0.081 watts (W), or 81 milliwatts (mW). That is well below 1/4 W (0.25W or 250mW) and also below 1/8W (0.125W or 125mW). While it isn't critical for this project, typically in engineering you want a "factor of safety" so you don't get *too* close to your maximum ratings, so if building a more permanent circuit in this case you'd probably go with 1/4W just to be safe. Hope that helps!
The kit on your site also has an Ohm resistor. You didn't use it on the video. What do you do with it?
You can use the resistor to check whether you've blown the fuse in your multimeter, see the project FAQ: www.sciencebuddies.org/science-fair-projects/project-ideas/Chem_p053/chemistry/electrolyte-challenge-orange-juice-vs-sports-drink?from=TH-cam#question9
@@Science.Buddies So other than that we don't need that.
Thanks!
Hi I am trying to do this project but what is the masking tape used for?
The masking tape is just used to put labels on different bowls. Please see the link in the video description for written instructions with more information.
Is this good for 6th grade?
A 6th grade student may be able to do this project, but might require some help from an adult to use multimeter.
@@Science.Buddies great, thank you!
I was wondering if there was a kit I could buy on amazon so i didnt have to buy so many different things
A kit with all the parts you need for this project is available here: www.homesciencetools.com/product/electrolyte-sport-drink-sensor-science-kit/?aff=SB1
it was helpful
when i try doing this for my sons it doesnt work for some reason
If you are having trouble with this project, you can ask for help in the Ask an Expert forums on our website: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro. You will need to provide more details about what exactly is not working.
Yo I’m using a 9 volt battery and it’s coming back as 9 volts every time
If you are having trouble with this project, you can ask for help in the Ask an Expert forums on our website and we can provide more support: www.sciencebuddies.org/science-fair-projects/ask-an-expert-intro
Help me
Ooor it’s just a volts boost
Hello
Sui
Thanks!