I like this video also. But I have some questions about the procedure. Does anyone know how I could contact with them?.
@areebsiddiqui99998 ай бұрын
Masha Allah !!!! Very Useful For University Level Students ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤ Keep Up The Great Nice Work From Pakistan 🇵🇰🇵🇸❤❤❤❤❤❤❤❤
@lenkaweglarzАй бұрын
Thank you! Your video really helped me to get to understand this process. Very useful!
@chatzidaАй бұрын
I am glad that it was helpful!
@samratkumawat97573 жыл бұрын
Thanks so much
@fancyboi2616 Жыл бұрын
Why does the EDTA solution have to be diluted to 0.01? Also, why is ethanol used in the indicator solution?
@shraddhanair525419 күн бұрын
can you explain the principle behind calcium content being found ?
@COC_champs13 жыл бұрын
I want to be one of them (4 students) , i can do it♥️
@chemistryfun3 жыл бұрын
Me also
@iqrakabirnoor3 жыл бұрын
Nice
@chimekkoo-old2 жыл бұрын
Me tooo
@angelasun9896 Жыл бұрын
Hello, does anyone know what pH of buffer is this using? Is it the neutral buffer solution 7? @chatzida
@eleazer_kips Жыл бұрын
Ph 10
@chatzida Жыл бұрын
No. It is a pH=10 buffer made with ammonia/ ammonium chloride
@mariansyk2 жыл бұрын
You have saved me. Χαιρετίσματα από international σχολείο της Ισπανίας :). Ωραίο βίντεο μπράβο
@chatzida2 жыл бұрын
Χαίρομαι που βοήθησε! IB project? Όταν λέτε international σχολειο εννοείτε "Ευρωπαϊκό σχολείο" ή κάτι άλλο;
@mariansyk2 жыл бұрын
@@chatzida ib ναι. Κάνουμε internal assesments στην 3η λυκείου με τα παιδιά. ( ατομικά projects ) Είναι ιδιωτικό internacional. Πρέπει να είναι πολύ τυχερά τα παιδιά που κάνετε τέτοια πειράματα σε δημόσιο σχολείο. Νομίζω δεν είναι σύνηθες. Μπράβο και για το εξαιρετικής ποιότητας βίντεο. Συγχαρητήρια
@anujsharma78534 ай бұрын
It's a gem for me. Love from India
@zoohorshaglof1285 Жыл бұрын
thanks
@tubbakhan43763 жыл бұрын
Amazing video very informative
@arvindmishraful2 жыл бұрын
Hey loved this from india
@user-cc4ob4sw3q Жыл бұрын
Hello, I am writing an essay on different amounts of calcium present in various types of milk and I would like to reference your name in the methodology as I have use the same method to conduct my experiment as the one in the video. Could you please give me the name you would like to be referenced by?
@chatzida Жыл бұрын
Sorry for the delayed response. My name is Dr. Chatzidakis Ioannis. I am really glad you found our method useful!
@goldggongchi2 жыл бұрын
so useful❤❤👍
@egekaradag83072 жыл бұрын
is there any chance that i can have the procedure
@shabnammostary89402 жыл бұрын
Why pH is 10 during the experiment
@chatzida2 жыл бұрын
At pH>10 there is a)sedimentation of Mg(OH)2 and b) the color of indicator at final point is orange which can not easily be discriminated from red. At pH
@shabnammostary89402 жыл бұрын
@@chatzida Thank you
@nurhafirani8631 Жыл бұрын
Great video. I want to ask a question. I used 0.1g patton-Reeder indicator to determine calcium in my sample. But it turn directly to purple after i added the indicator. It should be pink to purple to blue(end point). Is 0.1g is too much or my calcium content in sample is to low?
@lokeyBaby8 ай бұрын
i think that happened cause you used a different type of indicator.
@lillian94482 жыл бұрын
hii, great video! if I want to do this using yoghurt, what is the suitable amount? is it possible to determine the concentration of calcium and magnesium individually? lastly, I don't quite understand how the calculation works in 8:58 second line.
@lillian94482 жыл бұрын
and also, if we calculate the calcium concentration in milk, will the magnesium has the exact same concentration as the calcium?
@chatzida2 жыл бұрын
@@lillian9448 this method calculates the SUM of magnesium and calcium; calcium in milk is usually 10-15 times (in terms of milligrams) more than Mg.
@chatzida2 жыл бұрын
For the 1st question , I don't know but personally I would dilute yoghurt with 3-4 volumes of water , stir well, filter through a mesh, perform titration and then adjust your calculations considering the dilution. For the 2nd question, I am not aware of any titration method for individual determination, but there should be other more advanced methods like atomic absorption spectroscopy. For the 8:58 calculations we assume that all moles are Ca2+ (accordingly, we assumed that there is only CaCO3 - and not MgCO3 - in water) and therefore we multiply by atomic mass of calcium (=40)
@totocatz73422 жыл бұрын
@@chatzida hello! i'm not sure if i did this dilution right but i was curious in figuring out how i could dilute the yoghurt, (unit wise how many ml of water would that be?), i also found that before my titration the sample with the Black T indicator turned blue, and after titrating with EDTA it turned purple.. (which for this experiment I believe is supposed to be the opposite), do you might have an idea why and what i could be doing wrong?
@chatzida2 жыл бұрын
For the first question you can weigh like 20 g of yoghurt add about 50 mL water , stir well, filter through mesh and then add water to the flow-through up to 100 mL final volume. For the 2nd question, it seems that pH was not 10 (did you use a pH=10 buffer?)
@GisliNairs Жыл бұрын
I need 4 samples of water where can i get? I have no water bodies near me...