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I like the detailed explanations👏

@KayScience

2 жыл бұрын

thanks for the feedback, we have loads more of these videos at kayscience.com if you ever need help

This is really helpful. Thankyou

This was very helpful thank you so much.

Sir your explation was very nice and I got full marks in exam because of you

@KayScience

2 жыл бұрын

Amazing to hear! Love it :) Check out kayscience.com for 1000s of FREE quiz questions - hope you enjoy!

Thank you its helpful

All of my doubts are solved thanks a lot sir...🙌

@KayScience

2 жыл бұрын

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Thanks so much.

Thanks Kay science for your free lectures it is really helping me in preparing for caie.

@KayScience

9 ай бұрын

You're very welcome!

Really helpful 👍

Thanks sir ❤ very nice explanation

Thanks broski

thankful alot!

you sound like professor snape naturlly! love it

can I ask? I don't really understand that part when the pb at the cathode become two?

Too much good explaining 👏👏👏👏👏👏👏👏👏

@KayScience

Жыл бұрын

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الحمد لله ❤

why do we write pb2+ and not pb+,i have had this doubt for a really long time pls reply

@KayScience

2 жыл бұрын

2+ means the ion has a charge of 2+ where the atom has lost two electrons causing the positively charged ion to have 2 more protons than electrons - Pb is lead

6:45 where did the chlorine come from?

@leonardtangindipolifa8944

2 ай бұрын

that is why the answer is wrong

@kanjosie.school

2 ай бұрын

@@leonardtangindipolifa8944 ohh okay

how do u know which one of lead and bromide is positive and which is negative pls answer

@jahvaughnmckinson8319

3 жыл бұрын

The power supply is labeled

Why is it Pb^2+ + 2e-. I am a little confused as Pb2+ needs to lose 2 electrons to become Pb so I keep thinking it should be Pb^2+ - 2e-.

@KayScience

2 жыл бұрын

a Pb2+ ion is an ion where the lead atom has lost two electrons. To become an atom again the ion must gain two electrons to have a neutral charge and you can show this in the half-equation of Pb2+ + 2e > Pb ..... does this help?

Thanks

@KayScience

2 жыл бұрын

you are very welcome :)

What were the electrodes made of

@KayScience

3 жыл бұрын

Can be made of graphite

You have wrote negatively charged anions will GAIN electrons to become neutral at the end, in Q5) that has to be a correction if I'm right

@KayScience

3 жыл бұрын

thank you, silly mistake, forgot to change when making the questions!!

@KayScience

3 жыл бұрын

www.kayscience.com has launched and as a special giveaway we are offering a code for 50% off a one year subscription for your support. Please respond if this is something you'd like?

why does bromine gas form at the anode?

@walinthohirah1256

2 жыл бұрын

Because finally they form Bromine molecules after loses electrons,which is Br2 ,its is gas.

@KayScience

2 жыл бұрын

​ @Walin Thohirah what happens is the negatively charged bromide ions (Br-) are attracted to the anode (positively charged). At the anode each Br- anion loses 1 electron each forming bromine atoms. Two bromine atoms then form a covalent bond, forming a bromine molecule. Does that help?

so what is produced at the cathode and anode?

@KayScience

3 жыл бұрын

Lead is produced at the cathode and bromine is produced at the anode

@Ok-up7ty

3 жыл бұрын

@@KayScience Incorrect, Hydrogen is produced at the cathode, due to Lead being more reactive than Hydrogen as stated in the reactivity series. Please correct me if I'm wrong.

@KayScience

3 жыл бұрын

@@Ok-up7ty this is the electrolysis of MOLTEN lead bromide!! The only ions in the electrolyte are lead and bromide ions, so hydrogen cannot be formed. You are thinking of an aqueous solution, however lead bromide is insoluble in water so the electrolysis of lead bromide has to be done when the electrolyte is molten.

I dont understand why Br- ions become a Br atom when it loses an electron. It has 7 electrons on the outer shell so shouldnt it gain not lose?

@KayScience

2 жыл бұрын

Br- ions have one extra electron than protons due to the -1 charge. A br- ion will have a full outer shell, so to lose one electron will mean the anion becomes an atom with a neutral charge where the number of protons and electrons are the same and they can each other out. Did that help?

@prakashrajput9818

2 жыл бұрын

@@KayScience ohhhhhhhhhhh. That definitely helps. Thanks for that👍

@KayScience

2 жыл бұрын

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