10 Hardest Questions in AQA Chemistry Paper 1 - Grade 7, 8, 9 Booster Revision

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[Primrose_Kitten]

The 10 Hardest Questions in AQA Chemistry Paper 1

00:34 Using a diagram, describe the structure of a calcium atom.

03:26 Three (made up) transition metals were reacted together. Tromium oxide was reacted with pure carboltium and nothing happened, but when triomium oxide was reacted with pure harbold a reaction was seen. Give the order of reactivity and explain your reasoning. Predict what would happen when harbold oxide is reacted with carboltium.

06:17 Describe the difference in structures of diamond and graphite. Explain how this relates to their properties.

08:45 This question relates to the structure of metals.
a. Why are alloys hard?
b. why do metals conduct electricity?

10:58 How much zinc carbonate would make 97.2g of zinc oxide?

14:35 Explain what happens at each electrode during electrolysis of aluminium oxide.

16:41 Calculate the energy change when methane burns completely in oxygen. (C-H 413 KJ/mol; O=O 498 KJ/mol; O-H 464 KJ/mol; C=O 805 KJ/mol)

20:58 Describe how to find the concentration of an alkali, when using an acid of a known concentration.

21:56 What is the difference between strong and weak acids and high and low concentrations?

24:05 Explain the difference in reactivity between the group 1 and the group 7 elements.


Separate Science

27:38 Evaluate the use of nanotechnology.

29:42 25.0cm3 of H2SO4 at 0.1 mol is titrated against 30.0cm3 of NaOH. Find the concentration of sodium hydroxide.

33:40 17.2 g of salt was made from a reaction between calcium oxide and hydrochloric acid. It was expected that 21.4g would be made. For this reaction find the percentage yield and the atom economy.

37:27 How does a simple cell work?

[mia-nckk]

right guys C1 tomorrow who is trying to cram the spec into one day?

[AKMarch]

AAA THANK YOU SO MUCH!! this is so good and helpful!! lets just hope they dont throw the axolotl's cousin into chemistry tomorrow!!

[garenravindran]

this is legit so helpful because this is only for the serious people wanting level 9s

[nichenickey]

Will you be doing for physics and biology? These videos are so useful! Xx

[mazzakrazza]

exam tmr and watching this better get me at least a 7 :')

[fasihsaeed]

hows staying up all night to get everything done

[lilpinkbeananooshaullah]

Your literally the most amazing person for explaining anything !

[butterflysoobin]

i wish there were more videos like this!

[arshdhange]

at 30:54, shouldn't the concentration be in mol/dm3?

I thought it was moles at first:)

[hannahsavill]

god help all of us in the exam tomorrow after that ridiculous biology paper

[emmafr]

Science and Maths by Primrose Kitten
just to let you know this is SOOO HELPFUL. I cant wait for the biol and physics ones :)

[saarahluna]

Thank you, chemistry is my weakest science

[ameliahussain]

Please could you do a video like this for AQA Chemistry Paper 2 Combined Science..I would really appreciate itttt, exams are soon 😬

[zarabatool]

these are so helpful! Thank you. if you can, can you do more of these?

[crypticgod]

Can you go through like practical bits and how to answer them? Great videos!

[Ab-kxxv]

Thank you for the fist set of questions. Before watching your explanations, I got full marks on number one, got the last part of question 2 right, full marks on question 3, full marks on question 4, got the last bits of question 5 wrong; but everything else right, fist part of question six correct, almost all of seven correct, full marks on question 8, missed out 2 points on question 9, and missed out 2 bits on question 10. Overall I did okay, but I learned quite a lot from your explanations. Thanks again; you are a great teacher. :)

(I forgot to say I did it in timed conditions. It took me 35 minutes to complete.)

[ryanjagpal]

Isn’t the calcium electron placement 2+8+10 because the third shell can fit 18?

[mutusingh]

Thank you so much for these videos, will these question come up in the exam

[soha]

how many marks is the question for question 2? (the one about the order of reactivity for made up transition metals)