GCSE Chemistry Revision "Required Practical 5: Rates of Reaction"

[@l0wrii]

This man will go down in history as the guy who saved our generation in exams

[@anisahabbas5874]

Literally

[@fifamoments5332]

Yh

[@charliehunter_]

yes

[@Ryan.robertss]

He still carries

[@ceesayyyy8011]

facts

[@memesseagle001]

From laughing at his video during year 7 , I now thank him for giving me the knowledge before the exam tomorrow.

[@SC-md2yk]

if you are reading this we are in the same bloody boat my friend

[@sarahrutter4084]

Spencer Chapman boat? U mean titanic?

[@lencol583]

@@filthycommunist1922 Who's Chernobyl? Joking

[@antisocialbarbie1587]

Spencer Chapman thanks even tho you put it ten months ago iam just the future person who joined your boat my friend (:

[@evilmatt6465]

@@antisocialbarbie1587 I know it's been 3 weeks but I hope you did well!

[@JorisBohnson52]

Sarah Rutter HA

[@eleanor4618]

6:48 On The 12th of June 2019.....I have two hours before my Chemistry exam. If you find yourself in the same boat in 2020 or 2021+ ...well Good Luck Charlie

[@Ghost-cz8qv]

that's on my birthday. hopefully you passed !

[@fine5643]

Did you pass 😂😂😂

[@nataliethomas7090]

Eleanor this comment didn’t age well

[@muhammadahmedkhan6847]

How did it go?

[@petrapinter349]

Definitely didn’t age well considering the two years you mentioned both cancelled their GCSE’s 🤣

[@oliviabrigid8393]

this man is single-handedly responsible for my entire science gcse grade

[@sashhhaa4874]

I can confirm any new viewers are yr 10s scared for next yr bc we still have to do our GCSEs

[@Sana-um8xt]

OMDS YES ME

[@walidderouiche104]

i hope they lower the grade boundaries I SWEAR DOWN

[@FirePrehistoric2]

yes cambridge course is killing me and these videos are not fun

[@hannahmoomba5078]

sucks to be a y11 rbn

[@mariyamir1811]

@@hannahmoomba5078 ikr

[@Maxxosus]

Year 11 w paper 2 Chem mock tomorrow, my teacher didn’t even explain this practical to us, you’re a life saver

[@yiivrz]

I HAVE IT TOMORROW HAHA

[@debbie686]

what grade did you get if you feel comfortable sharing

[@melancholics_7808]

Why learn it the day before when you can learn it an hour and a half before 😍😍

[@detox3036]

..and still get 6-7 xd

[@amy_rei4277]

@melancholics_ Lol relatable

[@sssnipermonkey7296]

bro

[@freddiegathercole]

Me rn lmaoooo

[@gemma3637]

me rn

[@archiel5703]

Watching this for my 2020 gcse and reading the comments makes me want to cry

[@fine5643]

Archie L well I guess you didn’t have to do it 😬😬😬

[@loxbox1246]

new set of year 11s about to boost the views again now GCSEs are back

[@urdumb007]

ur right loool

[@harshgentle1529]

Bro single handedly carried the whole dunya through their GCSE journey and thought we won't notice.

[@fungusz_4292]

tf is dunya

[@crossoveramp]

@@fungusz_4292 means world

[@legospidermanoneandonly]

This man saved countless kids lives in exams

[@salmannadeem2827]

my igcse's are after ramadan, this year has been packed with studying i can't wait to finish my exam so i can continue playing football, going out and feeling alive again what a horrible time this has been.

[@nedcolville9462]

Hahah cant wait to never have to watch these videos again after tomorrow morning. (Unless I need to take a bloody retest)

[@arshiaafrin3656]

Anyone here actually revising at the right time instead of waiting til exams? Yeah, I didn't think so

[@itsawrap883p]

yh obviously.

[@rajjgaming5919]

me for real though

[@afatsquirrel1853]

4 days early lol. not that it matters 2 years later. how is a levle if you did it

[@charlotteelizabethriley5950]

Literally have my chemistry gcse in an hour

[@j_cyber1252]

Here, you dropped this king: 👑

[@tia5460]

claiming my place as a covid exam student rn because i feel like these videos will be used as future historical education sources

[@flamingninjas7856]

I love his ties

[@GOATEDEDITZ377]

you are the best in chemistry,good job.

[@hildam5939]

the night before my exam after HOUSES of procrastination I've finally started my first video of solution

[@joshtd304]

anyone cramming

[@Rashidgurung01]

MEEE, My only revision for paper 2, is from This KZbinr, phahah

[@ephascus8974]

Josh Td u already know g

[@yasirchowdhury3293]

Yep it's 12am

[@charizardb2029]

ha burning midnight light rn

[@GGGirl55]

Literally an hour before I have to leave

[@beaquin3173]

Hi, I was just wondering in the exam if we get a question based on this required practical would we be expected to remember the name 'sodium thiosulfate', or would that be given to us so we only had to recognise the term? Also, I wanted to say, your videos are SO helpful! Every GCSE student I've ever met would agree that you are an absolute legend - the number of students you have been able to help is astonishing. Thank you!! :)

[@Freesciencelessons]

Hi and thanks for the comment. Sodium thiosulfate is such a specific name and very few students can ever remember it so I think in the exam, they would give you that name as part of the question.

[@beaquin3173]

@@Freesciencelessons Thank you so much! That's good to know.

[@laraamaee]

Exam this morning !! Thank you so much for carrying me to my grade 🤩

[@lizziesomerville1186]

cool profile pic 😎😎

[@OJrB100]

How did u do

[@wizzyazemo4802]

Profile pic is incredible

[@wizzyazemo4802]

@@lizziesomerville1186 same here

[@lytr0fret152]

you are the man

[@ZoomShot1910]

Thanks for saving my GCSE

[@petrushilukilwa87]

Keep it up handsome atleast we are learning alot from you

[@huzaifahtahir2614]

30 mins before the exam, ngl the intro sounds better at 2x speed

[@Sondxs.]

Im here in the morning of my chemistry paper 2 exam for 2022 and im still learning the required practical. Wish me luck because im basically done

[@ellieroberts3654]

do we have to know both ways for tomorrow?

[@AnjolaoluwaAwe]

The exam is in minutes- quick cram

[@madeleinemcghee6816]

If you are reading this before an exam, good luck, you're gonna smash it!! ❤

[@rosieposie0426]

I like the video before it even starts as I know its gonna be good

[@peterlindley9945]

this man is a legend

[@antoniadarling5451]

Hello, in the CPG AQA revision guide it mentions like two more reactions similar to these two, should i revise all of them as well as these two? I don't think the second one in your video is even in the CPG book. Thank you !

[@Gabi-jy8ih]

Dear freesciencelessons, thank you.

[@lollipoplololoop7202]

Does this explain the marble chip and hydrochloric acid experiment

[@Sid-ff6qq]

Dude’s a legend, just subscribed

[@porkypine4529]

Should the black cross be drawn with a pen or a permanent marker, or with something else?

[@anabelbarnes3524]

its printed

[@seungmoohan8152]

it prolly doesn't even matter cause 'appereance to naked eyes' itself is extremely inaccurate regardless

[@salonii6345]

it doesn't matter as long as it's clearly visible

[@lotsblue2585]

think its printed

[@Runic_1]

anything as long as its obvious, a marker would work

[@toyinoladapo5144]

Do we need to learn both methods for the exam or can we just learn one for rate of reaction?

[@whitechocolate3597]

Tommorow lads stay strong

[@yusuf.5680]

gcses next week- oh great

[@milanacs1916]

Hi sir is it not possible to measure the volume of hydrogen gas via an gas syringe instead of a measuring cylinder ?

[@shaheerchaudhry9459]

Yes it is possible

[@saudiaair]

it is but the cylinder will reduce errors generated

[@nalaerii2362]

yep!! that's what our class did

[@saradali4033]

Well thanks man let hope this 4hr of revision imma about to do pays off

[@manrajjohal2270]

Do you need to know this if you’re AQA?

[@causticchaos4765]

Yeah, these are the AQA required practicals - not sure if they're the same for Edexcel.

[@charleslandlord]

yes

[@benmagill3383]

yes

[@slingman1074]

Yep

[@Alex-xq2qw]

Yes, all his science videos are for the AQA exam board x

[@aelrindel1668]

Day of the exam

[@rish5147]

2 weeks left

[@seungmoohan8152]

a day left =)

[@humzah_]

1 week now

[@couscous2687]

2 days now

[@shaheerchaudhry9459]

2 days left now :/

[@Efcutft]

17 hours left

[@AlexB-vs6pu]

mock tomorrow anyone?

[@gfunkpro2213]

yes lad

[@nobody1276]

yes boyzzzz

[@zainkhalil1873]

yes mate lets get itttt

[@CFC003]

Yo wat was in it

[@antisocialbarbie1587]

Alex B iam skipping mock my Friend

[@iustinasimina6223]

Thank you so much I rly needed this

[@Wondering..]

Do you guys know whats crazy to think about? the fact that any one of you guys might be in the same school as me, walk the same hallways as me

[@drinkwatergoodforhealth6101]

Today is my exam and its 2:30AM right now

[@xolio1993]

Isn’t the gas syringe experiment used?

[@fatjesus9985]

love this guy

[@d1stinct647]

banging video

[@lollystimler325]

these are helping so much, by any chance do you intend to release a video on the required practical on temperature effecting rate of reaction, as appose to concentration

[@lollystimler325]

*temperature change due to a reaction

[@Freesciencelessons]

I've just uploaded it. I hope that you find it useful.

[@eveyxp]

anyone else terrified for exams this year?

[@sunsetspice4143]

Yes 😭

[@brokenoob3797]

come on you got it!!

[@0lafs]

Cheeky revision before the exam

[@paulakonefal6897]

Excellent video thank you.

[@zarabibi12]

Why is chemistry paper 2 soo hard l mean chemistry paper 1 was soo easy 😪😟😓

[@Rahim103.5]

3:43 how do you measure hydrogen gas using a measuring cylinder? Aren't measuring cylinders used to measure the volume of liquid?

[@malvanoss5021]

Is the disappearing cross reaction the hypothesis of rates of reaction?

[@chickenuggetyum1]

It's that time once again!

[@eldrizzy1460]

Hi sir doctor Donnelly do we have to know the practical of marble chips and hydrochloric acid to produce c02?

[@DarkShadow-xu2gh]

hello sir do we need to know how to carry out both of these experiments or just the first one

[@Freesciencelessons]

You need to know both.

[@danielbugby4149]

You have just saved my arse my friend

[@teglord7745]

good luck for tomorrow!

[@Bongosaurus_0]

I'm studying from home while ill and dying from boredom

[@yahyakhan6433]

Literally the same rn, also ill

[@westcreative9994]

Do I need to remember exact measurements for practicals? Like the 10cm and stuff?

[@Freesciencelessons]

No you aren't required to learn exact quantities.

[@laurenxo6505]

my exam is in 2 hours, thankyou 😽

[@emmalol4174]

does anyone know if we need to know the exact measurements of each chemical for the exam????

[@gunjan027]

U don't need to know

[@dailydoseofmemes8203]

Pov: your here because of the advanced information

[@someone...000]

Hi sir, for the second practical, u know when u change the concentration of the acid. Would you keep the volume the same, or actually change the volume itself, eg by diluting it, so that the amount of acid stays the same, because increasing concentration whilst keeping the volume constant, must mean increasing the amount of acid, however wouldn't you want to keep the amount the same? Thus the only logical thing to me is to dilute it, right?

[@Freesciencelessons]

You only change the concentration of the hydrochloric acid, not the volume. So that means adjusting the volume of water so that the total overall volume remains constant. You are right, by changing the concentration of acid, we are changing to amount of acid particles in the given volume but that's fine since that's what concentration means.

[@mintjoe8]

for the reaction in which a gas is given off do you need to know how it would be done using a gas syring and a mass balance?

[@PyrexAgar]

Joeminator11 not a mass balance. Use the gas syringe to calculate how much gas is released / the time taken. Good luck tomorrow

[@harshithbonam6761]

Great video

[@stormyprawn]

Question: in the first experiment, you would change the concentration of the thiosulfate solution while in the second you would change the concentration of the hydrochloric acid. Why wouldn't you, for example, change the concentration of hydrochloric acid in both experiments or change the mass of magnesium in the second experiment?

[@ZALI7811]

who else wants to meet this guy 😂

[@bigguy1230]

Mate I have to do the gcse in year 10 for chemistry im finished

[@alexg8816]

what why

[@phase0400]

I think corona may of saved you.

[@zidankhan6489]

Could u please do a video on dynamic equilibrium

[@Freesciencelessons]

Here it is: GCSE Chemistry Revision: Reversible reactions and Le Chatelier's principle

[@FeatheryPens]

So…how many of us put off revising and are now hurriedly memorising this on the morning of the exam?? Good luck y’all 💀

[@themeparkcoastin8621]

I LOVE YOU

[@sosukeaizen1748]

who else is revising last minute ?

[@rozaygomez5068]

mrprice loves these//bigupmyman

[@alightbulb5528]

good luck lads

[@yusufhassan3933]

POV:your exam is tomorrow and your cramming in all the revision the day before.

[@Foreverambitous]

anyone who comes across me pls reach out to me in a year to see if i have done well im in year 10 now :D

[@asiangamer69]

same bro

[@yoongiboongi9911]

My exams have been cancelled but im still here using this for online school :)

[@jeonsoyeon3749]

can you also do the experiment with a lower concentration of hydrochloric acid ?

[@Freesciencelessons]

In theory yes. But in practice, the rate of this particular reaction does not depend on the concentration of hydrochloric acid (it's a complicated reaction).

[@firstconsul001]

Live the life of your dreams sir

[@Sumayya801]

Have I just started revising an hour before the exam? Wait am I even listening to this?

[@mf-mk8ph]

Thank you

[@aidanstokes6561]

Day before gang gang 2019

[@JamesSmith-nl3mj]

What is a suitable concentration for the hydrochloric acid?

[@zerotify9513]

In year 9 rn revising hoping to get a grade 9

[@outrageousgaming200]

do we need to know the second method or is the first one good enough?

[@joearsenal7]

He said both when replying to another comment

[@ghostbizzle7976]

Hi Do you think by watching all these videos you can prepare for the exam, and by also practising questions or do you believe more work is required

[@Freesciencelessons]

You need to also try to memorise the information, especially for the required practicals.

[@ghostbizzle7976]

@@Freesciencelessons ok thanks

[@simranjeetsingh6879]

do you have to learn the whole practical such as the steps or just the key bits?

[@Freesciencelessons]

You need to learn only the key bits. Try to summarise each one into around 6 stages. Don't get hung up on volumes etc.

[@simranjeetsingh6879]

@@Freesciencelessons will they ever ask you to just describe the whole experiment sir?

[@alishah7900]

AHHH WE GOT AN HOUR LEFT 2019 WHERE U AT

[@DragonRA]

aww this is cute, can we go back to 2019?

[@zalinthor]

Can you use a delivery tube leading to a gas syringe, which is held by a clamp stand, in order to record the gas produced?

[@Freesciencelessons]

Yes that would also work.

[@zalinthor]

Thanks for the reply. :-)

[@aeulia4359]

ty im sure this is useful

[@calibi8693]

gg

[@christacooper1959]

wouldn't doing the experiment again with a different concentration of sodium thiosulfate count as repeating the experiment again? And also, can you do the experiment with a higher concentration of sodium thiosulfate solution and not just a lower one?

[@heathwellback5110]

If you're talkin about reproducibility, then no cos he said you need different methods too. But for your second question, yes you can use higher concentrations, the conclusion that more hydrogen is given off in a fixed time would stay the same. You're only seeing the difference between a greater concentration and a smaller one.