Very detailed video. As a engineer that works at a large data center that uses evaporative cooling for our plant, we have to generate a lot of soft water every day. Sometimes the conductivity of the water gets a little low and I have to check the water hardness up to 3 times per shift. Thankfully we use simple TDH testing chemicals and also use a Hach DR 890 for more accurate readings. Thank you for the video :)
Have a nice day. Thank you for video and I have a question. One of my students do this experiment with EBT indicator last semester with her old teacher, and she didnt observe the color change pink to blue, but grey to blue. What can be the reason behind it, and Should we repeat the experiment because it is for SL internal. Thank you.
If I am titrating to find the effect of (temporary) water hardness due to temperature, is it alright if I use this method for total water hardness and then determine the effect of temperature on the change in water hardness (which would indicate the change in temporary water hardness)? How long would I have to let each water sample be at each temperature, before removing from the heat? Lastly, once it cools down and I carry out the titration, should I rinse the water pipette after every trial OR after every interval of water OR not at all? Would greatly appreciate your help and thanks a lot for the video demonstration!
To measure 100 ml of a water sample you used 25 ml pipette 4 times, but would it be better to use a 100 ml measuring cylinder? I thought this would minimize the bias, but at the end I'm not sure
What would you do suppose you have a water sample that you want to test for hardness and you find it is too hard that Even after adding all the EDTA the end point is not reached? Help please
Make a new, more concentrated EDTA solution and use it to titrate against the water sample. Trial and error will be involved to find the right concentration which will result in a suitable end point. Alternatively, dilute your water sample with distilled water - e.g. if you dilute a 10ml sample to 20ml with distilled water, you will need to multiply your total hardness found by 2 to account for the dilution.
You can use whichever you wish, or whichever you are asked for. However, due to the fact that water hardness is made up of the combined effect of many different calcium and magnesium compounds, the measurement for water hardness is standardised in terms of Calcium Carbonate - this means that, globally, everyone uses the same units in terms of the same compound in order to avoid confusion and ensure comparability.
@@lillian9448 To calculate Ca2+ on its own (e.g. for milk) we must remove the Mg first. We do this by adding some NaOH solution to our milk. We leave this for 5 minutes while gently swirling and the Mg2+ will precipitate out as Mg(OH)2 and settle to the bottom. We can then add the indicator and titrate as normal. This will give our Ca2+ concentration. We can subtract this concentration from the concentration we find when doing this titration normally (Ca2+ and Mg2+ combined) to find the Mg2+ concentration.
@@nicolascarbonell2560 I finished the experimenting part with 3 samples, 3 trials for each that makes a total of 9 trials. We'll have a mock exam next week, so I'm waiting to end the exams to complete my IA. Wbu?
To make up 1 litre of a 0.01M solution of EDTA (assuming it's the tetrasodium EDTA) you weigh out 3.8 g of the EDTA solid and make up to 1 litre using deionised/distilled water. (Molar mass of tetrasodium EDTA is 380 g/mol, and 0.01 x 380 = 3.8 g)
Thank you! I am doing this experiment myself and since you used 100 mLs of bottled water and 1 mL of the pH 10 buffer, if I use 50 mLs of water (tap water) instead, must I halve the buffer amount to 0.5 mL too or does it not matter? Also, should I measure the amount of indicator I tap into the water or does that amount not matter either?
@@kaylituh For the buffer, yes I would half the amount and use 0.5 mL. For the indicator you are trying to tap in the absolute minimum amount possible, swirl then let sit for a minute to allow the colour to develop. If the colour is too pale to clearly see, add more indicator (again, the absolute minimum amount possible). By using the smallest amount possible, you are already being consistent in your use of the indicator, so I wouldn't worry about weighing it. it is VERY easy to add too much indicator in this titration.
To make up 1 litre of a 0.01M solution of EDTA (assuming its the tetrasodium EDTA) you weigh out 3.8 g of the EDTA solid and make up to 1 litre using deionised/distilled water. (Molar mass of tetrasodium EDTA is 380 g/mol, and 0.01 x 380 = 3.8 g)
Yeah, I had the same thought myself when I looked back at the footage for the first time. I had 2.85 x 10^-2 and needed to multiply by 1000. I guess my thinking might have been that I'd rather make sure I wasn't off by an order of magnitude than have to redo the video. What I found more strange was that I used 10^-2 rather than just write out the full decimal value - I'd never normally use 10^-2... Guess having a camera in my face makes me do weird stuff 🤷♂️
Very detailed video. As a engineer that works at a large data center that uses evaporative cooling for our plant, we have to generate a lot of soft water every day. Sometimes the conductivity of the water gets a little low and I have to check the water hardness up to 3 times per shift. Thankfully we use simple TDH testing chemicals and also use a Hach DR 890 for more accurate readings. Thank you for the video :)
I really liked how you explained this. Very clear! Thank you!
Great video. Amazing explanation. Awfully clear. Thank you.
How to get know whether the value obtained in burette is correct??
Thank you so much, your video was really helpful, greetings from Venezuela
Have a nice day. Thank you for video and I have a question. One of my students do this experiment with EBT indicator last semester with her old teacher, and she didnt observe the color change pink to blue, but grey to blue. What can be the reason behind it, and Should we repeat the experiment because it is for SL internal. Thank you.
Thank you! I am a college student and I found your video very helpful.
This actually saved my a$$ in AC (anorganic chem)
Thanks so much! Finally understand this.
thank u so much i owe 10% of my grade to u
Fantastic video. A million times better instruction than the shit job my lab instructor did.
or my prof....
If I am titrating to find the effect of (temporary) water hardness due to temperature, is it alright if I use this method for total water hardness and then determine the effect of temperature on the change in water hardness (which would indicate the change in temporary water hardness)? How long would I have to let each water sample be at each temperature, before removing from the heat? Lastly, once it cools down and I carry out the titration, should I rinse the water pipette after every trial OR after every interval of water OR not at all? Would greatly appreciate your help and thanks a lot for the video demonstration!
THANK YOU! you saved my grade :')
Hi, must our indicator be solid? Or can it be in liquid form. Also if it is in liquid form, that means we must add more of it?
It was really helpful. Thank you.❤
Niall Horan being a chemist
great video, concept clear explanation.
It is use to find titration in cosmetics?
this was super helpful!! thanks for uploading :)
To measure 100 ml of a water sample you used 25 ml pipette 4 times, but would it be better to use a 100 ml measuring cylinder? I thought this would minimize the bias, but at the end I'm not sure
i believe a pipette is still more accurate than a measuring cylinder even when used 4 times. It might be because of its smaller diameter
Such a great video! Thanks a lot!!!
I used to storage the EDTA 0.01 in glass bottle, never see in any SDS that i should store it in plastic.
Please can you support any evidence for that
U waist Man U big cappin
Repeating this experiment with Deionized water what should we expect?
What would you do suppose you have a water sample that you want to test for hardness and you find it is too hard that Even after adding all the EDTA the end point is not reached? Help please
Make a new, more concentrated EDTA solution and use it to titrate against the water sample. Trial and error will be involved to find the right concentration which will result in a suitable end point. Alternatively, dilute your water sample with distilled water - e.g. if you dilute a 10ml sample to 20ml with distilled water, you will need to multiply your total hardness found by 2 to account for the dilution.
Brahh you saved my IA!!
SAMEEEEE
haha same
Nice explanation, thank you so much!
Very clear explanation. Thank you
GREAT EXPLANATION
WHAT WE CAN USE AS A TİTRANT İNSTEAD OF EDTA ????
That was very very helpful thank you very much !
How much edta 4na needed to reduce water with hardness 900
Thank you so much for a good explanation
This was very helpful!
do I have to use the molar mass of calcium carbonate or can I continue with the molar mass of calcium and magnesium?
You can use whichever you wish, or whichever you are asked for. However, due to the fact that water hardness is made up of the combined effect of many different calcium and magnesium compounds, the measurement for water hardness is standardised in terms of Calcium Carbonate - this means that, globally, everyone uses the same units in terms of the same compound in order to avoid confusion and ensure comparability.
what is the name of the ph10. buffer product?
Thank you, this helped me a lot!
Amazing explanation
Can you comment on the results of total hardness
hi! if we need to calculate the mg and calcium in milk, do we also assume caco3 during the calculation?
and if we want to determine the concentration of calcium and magnesium individually, how do we do that
Yes, Ca2+ and Mg2+ concentration is always standardised by assuming it is CaCO3 afaik
@@lillian9448 To calculate Ca2+ on its own (e.g. for milk) we must remove the Mg first. We do this by adding some NaOH solution to our milk. We leave this for 5 minutes while gently swirling and the Mg2+ will precipitate out as Mg(OH)2 and settle to the bottom. We can then add the indicator and titrate as normal. This will give our Ca2+ concentration. We can subtract this concentration from the concentration we find when doing this titration normally (Ca2+ and Mg2+ combined) to find the Mg2+ concentration.
What is the aim of this experiment
Very helpful !! THANKS
Reading ky h sir
Thanks broods Gon help a lot for my IA
hahaha I'm using this as my IA too
@@calpardo same here how is it going
@@nicolascarbonell2560 I finished the experimenting part with 3 samples, 3 trials for each that makes a total of 9 trials. We'll have a mock exam next week, so I'm waiting to end the exams to complete my IA. Wbu?
Thank you it was very useful
How did you prepare the EDTA solution?
To make up 1 litre of a 0.01M solution of EDTA (assuming it's the tetrasodium EDTA) you weigh out 3.8 g of the EDTA solid and make up to 1 litre using deionised/distilled water. (Molar mass of tetrasodium EDTA is 380 g/mol, and 0.01 x 380 = 3.8 g)
Thank you! I am doing this experiment myself and since you used 100 mLs of bottled water and 1 mL of the pH 10 buffer, if I use 50 mLs of water (tap water) instead, must I halve the buffer amount to 0.5 mL too or does it not matter? Also, should I measure the amount of indicator I tap into the water or does that amount not matter either?
@@kaylituh For the buffer, yes I would half the amount and use 0.5 mL. For the indicator you are trying to tap in the absolute minimum amount possible, swirl then let sit for a minute to allow the colour to develop. If the colour is too pale to clearly see, add more indicator (again, the absolute minimum amount possible). By using the smallest amount possible, you are already being consistent in your use of the indicator, so I wouldn't worry about weighing it. it is VERY easy to add too much indicator in this titration.
Very helpful, thank you.
U looking kind of cute
Gay
Diddyyyyyy😂😂
how am i supposed to do the 0.01 M of EDTA ?
To make up 1 litre of a 0.01M solution of EDTA (assuming its the tetrasodium EDTA) you weigh out 3.8 g of the EDTA solid and make up to 1 litre using deionised/distilled water. (Molar mass of tetrasodium EDTA is 380 g/mol, and 0.01 x 380 = 3.8 g)
hello, does Ethylenediamine tetraacetic acid work too?
Thank you sir bless ya heart
I thought this was a Minecraft tutorial
Thanks, super helpful!!!😊
God bless you sir
THANK YOU SO MUCH
شكرا❤
thank you.
what is the concentration of EDTA?
Hi, do you have an email for me to ask questions?
Feel free to ask here
thankuuuuuuuuu sir
When the titration only takes 3 ml
Thanks
Thankyou bro.
this helped me a lot
bro did u finish your lab?
can u tell me how tf to do it? please
@@michellecampa9850 yeah, are u on the discord group?
Thanks for the help but I somehow ended up with 9000ppm... definitely a me problem lol
So complicated
Did you really use a calculator for 0.0285*1000 ?😂 Anyways nice video just found that funny.
Yeah, I had the same thought myself when I looked back at the footage for the first time. I had 2.85 x 10^-2 and needed to multiply by 1000. I guess my thinking might have been that I'd rather make sure I wasn't off by an order of magnitude than have to redo the video. What I found more strange was that I used 10^-2 rather than just write out the full decimal value - I'd never normally use 10^-2... Guess having a camera in my face makes me do weird stuff 🤷♂️
Idgi, how is it funny? Like I get it, move the decimal point 3 places but still… are you trying to be… “one of those guys”
i love you
What non sense writting on 0paque surface
Yuckkkkk