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ChemEasy
Nigeria
Приєднався 17 гру 2015
Welcome to ChemEasy where I make Chemistry Easy.
I'm Jeremiah Governor Eko, your host and chemistry enthusiast. With a robust background in chemistry, I'm committed to distilling complex ideas into crystal-clear explanations, making the subject more comprehensible and engaging for all. So, roll up your sleeves, buckle up, and get ready to embark on a thrilling adventure through the realm of chemistry! Together, let's demystify the intricacies of chemistry and make learning a delightful experience with ChemEasy!"
I'm Jeremiah Governor Eko, your host and chemistry enthusiast. With a robust background in chemistry, I'm committed to distilling complex ideas into crystal-clear explanations, making the subject more comprehensible and engaging for all. So, roll up your sleeves, buckle up, and get ready to embark on a thrilling adventure through the realm of chemistry! Together, let's demystify the intricacies of chemistry and make learning a delightful experience with ChemEasy!"
GUIDE TO NECO 2024 (Salt Analysis) QUALITATIVE ANALYSIS OF Zinc (II) Chloride and Milk Solution
GUIDE TO NECO 2024 (Salt Analysis) QUALITATIVE ANALYSIS OF Zinc (II) Chloride and Milk Solution
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Відео
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Переглядів 5132 місяці тому
1. Link to Part 1 ua-cam.com/video/iqZeV4sqq1E/v-deo.htmlsi=-RKeSUYabGTK3Vs8 2. Link to Part 2 ua-cam.com/video/Kmub4ZhgHjg/v-deo.htmlsi=_MhzKhF2xtnOrqKY
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1. Link to Part 1 ua-cam.com/video/iqZeV4sqq1E/v-deo.htmlsi=YR9cX3V2BOvPo-V1 2. Link to Part 3 ua-cam.com/video/DoXk6ox0FJU/v-deo.htmlsi=6itBRDVagMCu-doj
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1. Link to part 2 ua-cam.com/video/Kmub4ZhgHjg/v-deo.htmlsi=AZVOggz3BuBegTuE 2. Link to part 3 ua-cam.com/video/DoXk6ox0FJU/v-deo.htmlsi=BddlwQwG-JFcT6Vm
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Переглядів 4263 місяці тому
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WAEC QUESTIONS CAME EXACTLY AS PREDICTED!!!🔥🔥🔥🔥I WISH YOU ALL SUCCESS.
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Переглядів 5 тис.2 роки тому
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Переглядів 6 тис.2 роки тому
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Thanks much
You are welcome
Thank you for this video sir. Please I conducted a titration practical for Ss2 students today using 5.0g/dm3 Na2CO3 and I dissolved 9 cm3 Conc HCl in 1 dm3..but firstly the methyl orange indicator was light pink instead of yellow when I dropped it in the Na2CO3 that I pippetted. Secondly there was. No reaction between the two reagents. Please what did I do wrong 🙏. I will be glad to hear from you sir
In this case, I think the problem you re experiencing is an "indicator error". Methyl orange can degrade over time or be affected by light leading to incorrect colour changes. I will advice you also double check the concentration of the acid and the base, and most importantly prepare a fresh methyl orange indicator from the methyl orange powder or purchase another methyl orange powder and prepare a fresh solution from it. Use this link below to learn how to prepare methyl orange indicator ua-cam.com/video/lKVDzocGHuU/v-deo.html
@@ChemEasy_Eko Thank you very much sir
You re welcome
Good work sir, which satchet milk is most recommended.
You are welcome. You can use any one. I used Peak powder milk
Thank you sir
You are welcome
God bless you Sir
Thank you so much
ChemEazy please I am still waiting for the procedure for sodalime solution 🙏
And also what could be the reason why I'm having 14. as end point? Should i leave the base to stand for a while??
No, you don't have to Could be a problem with your reagent or chemicals or method of preparation
@@ChemEasy_Eko i noticed it's from the indicator. I've changed it. Thanks for your response
@preciousogbonna2420 Oh! That's great. You are welcome. Success in advance
Good day I tried this titration but I didn't get the deep orange colour, the color was the same just lighter
Your methyl orange indicator might be the caused. Try preparing or using a different methyl orange indicator. Watch the video below on how to prepare methyl orange by clicking on the link ua-cam.com/video/lKVDzocGHuU/v-deo.html
Good day Sir During WAEC, we wrote answers in 3 decimal places instead of significant figures. Will it be a problem? Thanks for your good work
If it is volume, answers should be written to 4 significant figure or 2 decimal places such as 20.43 instead of 20.4 because of systematic errors in reading an equipment. If it's any other calculations e.g involving concentration, you limit the significant figure of the final answer to the digit with the fewest significant figure. E.g assuming you want to add 23.456 + 21.1235 + 21.10 = Your final answer should have the same significant figure with the digit with the fewest significant figure (i.e 21.10) Hence, when you add the above to get 65.6795 you should approximate the final answer to 65.78. inorder words you have limited the significant figure in the final answer to the digit in your calculation with the fewest significant figure.
God bless you
Thanks 🙏
Boss please can you assist me in the qualitative analysis between CUSO4 AND Zn(No3)2
For the QUALITATIVE analysis of CuSO4 and Zn(NO3)2, the ions present are 1. Cu²+ (Copper ion) 2. Zn²+ (Zinc Ion) 3. SO4²- (Sulphate ion) 4. NO3- (Nitrate ion) 1. To Qualitatively analyze copper, the reagents used are caustic soda (NaOH) and aqueous ammonia. PROCEDURE: Dissolve a small amount of copper sulfate in water. OBSERVATION: The solution will be blue, indicating the presence of Cu²⁺ ions. I. Addition of Sodium Hydroxide (NaOH):Procedure: Add a few drops of sodium hydroxide solution to the copper sulfate solution. Observation: A light blue gelatinous precipitate of copper(II) hydroxide (Cu(OH)₂) forms which is insoluble in excess Reaction: Cu²⁺ + 2OH⁻ → Cu(OH)₂ (blue precipitate) II. Addition of Ammonia (NH₃): Procedure: Add dilute ammonia solution to the copper sulfate solution dropwise. Observation: Initially, a light blue precipitate of copper(II) hydroxide forms, which dissolves upon adding excess ammonia, forming a deep blue complex [Cu(NH₃)₄]²⁺. Reaction: Cu(OH)₂ + 4NH₃ → [Cu(NH₃)₄]²⁺ + 2OH⁻ 2. To Qualitatively analyze zinc ion, the reagents used are caustic soda (NaOH) and aqueous ammonia. I. Adding caustic soda in drops give a white gelatinous precipitate, in excess the precipitate is soluble to give a clear solution II. Adding ammonia in drops give a white gelatinous precipitate which is soluble is excess to give a clear solution. 3. To Qualitatively analyze sulphate ion (SO42-), the reagents used are Barium Chloride and dilute HCl I. Make an aqueous solution of the sample. To the solution add barium Chloride, a white precipitate of barium sulphate is form II. Proceed by adding HCl, the precipitate is insoluble in dilute HCl 4. To Qualitatively analyze NO3- the reagents used are freshly prepared FeSO4 solution and concentrated H2SO4. I. Make an aqueous solution of the sample. To the solution of the sample, add few drops of freshly prepared FeSO4 solution followed by concentrated H2SO4 acid along the side of the rest tube in a slant position. A brown ring is formed just at the junction of the acid and the solution. 5. Also, you can test for nitrogen (IV) oxide gas (NO2) by placing Zn(NO3)2 salt in a boiling tube and heat strongly Observation: the salt decomposes with a crackling sound , the gas evolved is reddish brown that turns moist blue litmus paper red. Confirmatory Test with Copper Turnings and Concentrated Sulfuric Acid: Procedure: Add a few copper turnings to the zinc nitrate solution and then add concentrated sulfuric acid. Observation: Brown fumes of nitrogen dioxide (NO₂) will be released, indicating the presence of nitrate ions
Weldone sir. Please i am a teacher, what would be a suitable concentration for preparation of bench reagents. Does it need to be uniform for all bench reagents?
It depends on your intended use. Most times I prepare 1M concentration or 0.1M concentration
Brief, and rich🎉
Thanks 🙏👍
Thanks alot sir
You re welcome
Good morning boss Please 🙏 What re the reagents used in the quantitative analysis between cuso4 and zn(no3)2. Have done it but i want to be sure if am correct 🙏.
Do you mean qualitative analysis?
@@ChemEasy_Eko yes sir the qualitative analysis
Please i dont gave pure copper sulphate can i use the hydrated one
Yes you can
Thank you so much Sir 😊
You are welcome. I appreciate your comments 🙏
Thank you so much Sir 😊
You are welcome
Thank you so much Sir 😊 God bless you Sir 🙏
Thanks 👍
Thank you for the good work sir. God bless you ijn
Amen 🙏 You are welcome
Well-done sir🎉
Thanks
Please how do I make sodalime solution🙏, I think it's one of the requirements for the practical, how many grams of Ca(OH)2 and NaOH if I am using 100cm of water
I don't see it's relevance in this analysis as it tis used in absorbing CO2 gases, drying gases and sometimes in water purification. Anyway, if you still need the requirements I will send you a detailed procedure for it.
@@ChemEasy_Eko thank you so much, please I really need it, I will appreciate if you will send me the procedure for it.
NaOH + CaO= soda lime ..that's all
@@AbughSamsonHough how many grams for each
In 250cm3 of water
thank you so very much for this it was very helpful 😇
You re welcome 🤗
Wonderful job you do. Please, when you finish a titration, do you tap off the remaining acid in the tip of the burette since its not part of the burette calibration. I mean the added burette tip
No! The calibration of the burette typically includes the volume within the entire burette, including the tip. Therefore, any liquid remaining in the tip is part of the total volume dispensed as long as it was initially filled into the burette. You should not tap off or attempt to remove the remaining acid from the tip of the burette after the final reading. The volume that has been read from the burette scale includes the liquid in the tip as part of the burette calibration. Tapping off the remaining liquid would alter the actual volume dispensed, leading to inaccuracies in your titration result
Thanks sir , this is very good sir
You are welcome
Weldon with your wholesome gesture
Thanks Sir
What are the reagent used please
Hydrogen peroxide Manganese (IV) oxide Liquid soap Colourant
May God bless you abundantly!! This is so wonderful Keep it up please ❤️❤️
Thanks 🙏
Thank you very much sir
You are welcome
Cool.... Please I need a genuine chemistry neco study group
Thank you very much sir This is very simple
You are welcome
The simplicity is great, although thank u sir
Thanks 👍
Thank u sir, but I think the question pattern is for WAEC
Kudos sir
Thanks 🙏
Weldon sir. More wisdom
Thanks 🙏👍
Well done sir, please those that have viewed so far , are up to 50, but check the Likes 5 ,haba this how we can encourage him.
Thanks 🙏👍
Boss you are doing a great job I really love your work may the lord bless you
Amen. Thanks 👍🙏
God bless you sir
Amen. Thanks
Can't we use amount(mole) =mass/molar mass to find the molar mass of x2co3
Of course you can Molar mass = mass/mole Mass = 6g Mole = 0.0566mol (per dm³) Molar mass = 6g/0.0566mol Molar mass = 106g/mol
@@ChemEasy_Eko okay sir thank you
@@ChemEasy_Eko sir please there is a question I saw I don't know if I send it to you maybe it can serves as preparatory questions also
Ok send it. Reach me via this link facebook.com/governorjerry?mibextid=ZbWKwL
Weldone sir I really love your work and I pray the lord will reward you abundantly. Please don't forget the salt analysis
You re welcome Thanks!!! Definitely
Is it 5ml measuring cylinder or 10ml measuring cylinder
Good evening sir weldone sir Please how many ml is your measuring cylinder used to measure your acid of 3.8
10ml. But if u have 5ml measuring cylinder I ll advice you use it for more accuracy.
What if I did my titration ND d color does not changed, wat can be wrong with d titration?
So many factors could be responsible for it: 1. Check your indicator 2. Check the solutions concentration 3. Check the purity of the solution etc
Weldon sir. Good one
Just watching this boss this is a great work
Sir ur number
Reach out to me via facebook.com/governorjerry?mibextid=ZbWKwL Thanks
Good morning our amiable chemistry teacher. We are proud of you . Please when should we be expecting neco chemistry practical preparation. Because the specimens that will be used in the exam is out
Good morning our amiable chemistry teacher. We are proud of you . Please when should we be expecting neco chemistry practical preparation. Because the specimens that will be used in the exam is out
Very soon. Thanks for reaching out🙏
@@ChemEasy_Eko okay sir weldone sir
Thank you very much ChemEasy, God bless you. Please I'd like to ask, is there a difference between chemistry practical alternative A and chemistry practical alternative B? Thank you once again, very grateful for your page
1. Chemistry Alternative A is a practical examination where students perform actual laboratory experiments. This practical component typically involves using laboratory equipment and chemicals to carry out specific tasks outlined in the exam. While: 2. Chemistry Alternative B is designed for schools or candidates that may not have access to fully equipped laboratory facilities. Instead of a hands-on practical exam, Alternative B features a "practical paper" that is theoretically based. This paper often includes alternative-to-practical questions where students are tested on their understanding of practical concepts without having to perform actual experiments.
Question d to be preside
Pls when they are talking about the amount of MmO ions I thought is the number of particles of ions present instead of mol that question f and the idea that is running on my mind is number of ion equal to mol times avogadroconstant I don't know if am right
No. Calculating the number of atoms of MnO4- and the amount of moles of MnO4- are two related but distinct concepts. 1. To find the number of moles of MnO4- we use: Mole = mass/molar mass 2. To find the number of atoms, you first need to calculate the number of moles and then use Avogadro's number to convert moles to atoms Number of atoms = number of moles×6.022×10²³ atoms/mol
Is there particular volume of H2SO4 that must be measured to get it diluted