[HD] Salt Preparation - Titration Method using Methyl Orange

Acid-Base Titration demonstration for Secondary 3 Chemistry:
Titration of hydrochloric acid with sodium hydroxide to prepare sodium chloride salt. Indicator used: Methyl Orange.
General equation:
Acid + Alkali ---- Salt + Water
Word equation:
Hydrochloric acid + Sodium hydroxide ----- Sodium chloride + Water
Chemical equation:
HCl + NaOH ---- NaCl + H2O
*Note: Experimental results may vary a little, depending on the concentration of indicator used.
All Rights Reserved - Raquel Yoong
Chemistry and Social Studies teacher
Singapore
Filmed on Canon EOS 80D
Edited on iMovie

[@ognjenristic503]

This is the best titration video I've ever seen! ✨✨✨✨✨✨✨✨✨

[@laichengchee6214]

you have passed the end point. Alkali typically placed in conical flask. end point is obtained when solution turned from yellow to orange. when you placed acid in conical flask, it is more difficult to see pink to orange when the correct drop of titrant is added. U fail to see the orange in the video and way past the end point. That's why the final solution is Yellow, which shows you have added too much NaOH from the burette.

[@RaquelYoong]

thank you for the comment, this is one of the many things that can be improved on for this video 👍🏼 it was self-directed and filmed alone in a short span of two hours, hope to correct all mistakes in the subsequent edition.

[@115Carssssssssss]

The colour is too yellow, addition of sodium hydroxide should be stopped when the mixture turns orange.

[@hanliewessels9769]

The money shot is at 3:25. The colour of the indicator at low, neutral and high pH (to tell you if you are not far enough, just right or too far)

[@mantosh56]

money shot haha

[@user-jz8wr9gz6j]

Who else thought that the teacher in the video is too cute for being a teacher?

[@RaquelYoong]

then what should I be instead :O

[@melss5995]

Thank you for this 💖💖 so clear to understand :3

[@RaquelYoong]

Glad it was helpful! :)

[@ainurmardhiah4570]

yeah so true

[@ghostofday5025]

thanks for showing the titration, but you should have mention in pinned comments that end point is reached when phenolphthelein is orange, yellow indicates alkaline solution. Anyways have a good day mate!

[@anithagpillai3067]

Its does upto plain water

[@spreenini3193]

Why shouldnt we add indicator the second time we do the experiment?

[@safwanharis4116]

Wdym?

[@runan6767]

cause u want to get a pure solution of the salt without indicator as a contaminant

[@askarmy]

Thankuh you made this experiment easy for me. Lot's of gratitude

[@raine1049]

Could I ask how come your methyl orange is orange in alkaline solution and yellow in neutral? Isn't it usually the reverse?

[@RaquelYoong]

Lorraine Soon Acid was added using the pipette in this case, so the solution is acidic at first, and thus the indicator was orange in acidic solution. The reverse happens in the other cases that you hv seen bcos NaOH was pipetted, and titrated against unknown acid :) it depends on which of it is the unknown given to u!

[@raine1049]

I tried the titration above but my end point was orange before going to yellow when I added the excess alkali.

[@RaquelYoong]

Ah I see what you mean.. yes you are not wrong :) thanks for pointing that out though, may have been a mistake on my part, I'll do it again when I find the opportunity next time.

[@pobby600]

I have pratical exam tmr this saved me thanks

[@MadMax-gi3gq]

Good

[@zainabamjad5873]

Respected mam
Thank you so much

[@morydeentoure9420]

hello I have just followed your intervention on the factory of the chemical ssd but question is to know if this solution can clean the black money?
please answer me please thank you

[@crazgaming5236]

Very good and informative. 10/10 -IGN

[@shabnam_sajida]

Amazing

[@legotube239]

GOOD VIDEO

[@el_eleminador1071]

Thank you, very well understandable! :)

[@vitatitiwari8595]

I think you forgot to add phenolphthalein

[@sr.s935]

THANK YOU SOO MUCH Mam

[@dollarrocks1258]

I AM SO CONFUSED .OUR TEACHER PUT ACID IN BURETTE AND BASE IN PIPETTE

[@RaquelYoong]

First breathe in, and then relax.. let me clear your confusion :) Main point is that you have to see what your question paper requires you to do, yours may be different from mine, thus a different method - look out for the unknown that you are investigating, and then plan your experiment around it.
In your case the concentration of the acid is probably the unknown, thus you add the acid to the burette. The formula for concentration is no. of moles divided by volume. At the end of titration, you will obtain a value for the volume of acid needed to neutralise your base (which has a known concentration, say 0.10 mol/dm3, AND a known volume of 25.0cm3, since you used the pipette of this size).
By simple calculation you can find the number of moles of base added, which is the same for the acid since it's 1:1 for NaOH and HCl reacting together. Finally, using this value for the number of moles of acid to divide by the volume of acid which you get at the end, say 20.4cm3, you can solve for the concentration of the unknown in your case, which is the acid.
Remember to convert your cm3 and dm3 units accurately too. Hope this helps :) This is one of the toughest topics in Chemistry, so no need to beat yourself up over it too, take your time to understand!

[@sharonelsa2560]

thats for titration of naoh and oxalic acid

[@chandamwila1754]

You the process is interchangeable depending on the question.

[@anayguptaanaygupta3612]

Beautiful Video!

[@THY403]

Wait it's ok of we put acid in the burette and alkali in the flask?

[@somerandomguy8491]

DaEpikTrolle yuan yuan

[@THY403]

some random guy
O
K
Can
Noted
No thanks
Bai

[@samkelisiwemhari8062]

I don't think it ok

[@samkelisiwemhari8062]

The result won't be the same

[@THY403]

Samkelisiwe Mhari oh ok tq

[@mynamejeff2217]

I die already, ez End of year exam fail

[@frostfish-627]

Same

[@zainabamjad5873]

Awesome

[@narasimhagedam6553]

Supper

[@varshatak791]

kya

[@fargazin3217]

tmr o lvl liao💀

[@RaquelYoong]

all the best 💪🏼💪🏼

[@katmcmid1341]

Where are your gloves and lab coat? :(

[@katmcmid1341]

@@NerdyNEET no way! SUITS?! That's so crazy to think of now in this day an age. Thanks for sharing. You learn something new every day :)

[@limcheesiongaxcel5345]

too many errors happened.

[@el_eleminador1071]

I didn't see any.