OCR A LEVEL CHEMISTRY Study guides, Class notes & Summaries
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OCR A LEVEL CHEMISTRY DEFINITIONS 2023- 2024 EXAM [ALREADY GRADED A+] WITH CORRECT DETAILED
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OCR A LEVEL CHEMISTRY DEFINITIONS 
EXAM [ALREADY GRADED A+] WITH CORRECT 
DETAILED
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OCR A LEVEL CHEMISTRY DEFINITIONS 2023- 2024 EXAM [ALREADY GRADED A+] WITH CORRECT DETAILED
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OCR A LEVEL CHEMISTRY DEFINITIONS 
EXAM [ALREADY GRADED A+] WITH CORRECT 
DETAILED 
 
 
 
Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and 
bases 
 
Anion - ANSWER-A negatively charged ion 
 
Anhydrous - ANSWER-A substance that contains no water molecules 
 
Arrhenius plot - ANSWER-A graph of lnK = lnA - Ea/R x 1/T 
 
Atomic Orbital - ANSWER-A region of space where you will likely find electrons. 
Each orbital can hold 2 electrons, with opposite spins ...
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OCR A LEVEL CHEMISTRY DEFINITIONS 2023- 2024 EXAM [ALREADY GRADED A+] WITH CORRECT DETAILED Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and bases Anion - ANSWER-A negatively charged ion Anhydrous - ANSWER-A subst
- Exam (elaborations) • 11 pages • 2024
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OCR A LEVEL CHEMISTRY DEFINITIONS 
EXAM [ALREADY GRADED A+] WITH CORRECT 
DETAILED 
 
 
 
Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and 
bases 
 
Anion - ANSWER-A negatively charged ion 
 
Anhydrous - ANSWER-A substance that contains no water molecules 
 
Arrhenius plot - ANSWER-A graph of lnK = lnA - Ea/R x 1/T 
 
Atomic Orbital - ANSWER-A region of space where you will likely find electrons. 
Each orbital can hold 2 electrons, with opposite spins ...
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OCR A LEVEL CHEMISTRY DEFINITIONS 2023- 2024 EXAM [ALREADY GRADED A+] WITH CORRECT DETAILED Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and bases Anion - ANSWER-A negatively charged ion Anhydrous - ANSWER-A subst
- Exam (elaborations) • 11 pages • 2024
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- $19.49
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OCR A LEVEL CHEMISTRY DEFINITIONS 
EXAM [ALREADY GRADED A+] WITH CORRECT 
DETAILED 
 
 
 
Amphoteric chemicals - ANSWER-Chemicals that can react with both acids and 
bases 
 
Anion - ANSWER-A negatively charged ion 
 
Anhydrous - ANSWER-A substance that contains no water molecules 
 
Arrhenius plot - ANSWER-A graph of lnK = lnA - Ea/R x 1/T 
 
Atomic Orbital - ANSWER-A region of space where you will likely find electrons. 
Each orbital can hold 2 electrons, with opposite spins ...
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OCR A Level Chemistry TOP Exam Questions and CORRECT Answers
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Isotopes Different atomic forms of the same element. Atoms with the same number of 
protons but a different number of neutrons 
Relative atomic mass The mean mass of an atom of an element, compared to 1/12th of 
the mass of an atom of carbon-12 
Concentration= Number of moles ÷ Volume 
One mole 6.02×10^23 
Number of moles= mass ÷ molar mass 
r.t.p 25 ºC 
100 kPa (1 atm)
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OCR A Level Chemistry UPDATED Exam Questions and CORRECT Answers
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acidA species that is a proton donor. 
activation energyThe minimum amount of kinetic energy that particles need to have in 
order to react when they collide 
addition polymerA very long molecular chain formed by repeated addition reactions of 
many unsaturated alkene molecules (monomers). 
addition polymerisationThe process in which unsaturated alkene molecules 
(monomers) add on to a growing polymer chain one at a time to form a very long saturated 
molecular chain (the addition polymer). ...
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OCR A level Chemistry Mark Scheme latest updated
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OCR A level Chemistry Mark Scheme latest updated 
 
 
The chemist finds the value of Kp is greater when the experiment is repeated at a different temperature. Explain whether the temperature is higher or lower in the second experiment (2) - answers-
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OCR A-level Chemistry -
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OCR A-level Chemistry Elaborated 
 
 
Enthalpy change of hydration - The enthalpy change when one mole of gaseous ions are dissolved in water to give one mole of aqueous ions 
Enthalpy change of solution - The enthalpy change when one mole of ionic substance dissolves in water to make a solution of infinite concentration 
How do you prepare a standard solution? - -Weigh out correct mass of solid 
-Dissolve in distilled water 
-Transfer to a 250cm^3 volumetric flask 
-Wash beaker wi...
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OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS WITH COMPLETE SOLUTIONS
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OCR A LEVEL CHEMISTRY ORGANIC SYNTHESIS 
WITH COMPLETE SOLUTIONS 
 
alkene undergoes what type of polymerisation - CORRECT-addition 
polymerisation 
Alkene to alcohol - CORRECT -Electrophilic addition 
conc (phosphoric) acid catalyst 
steam 
Haloalkane to nitrile - CORRECT -nucleophilic substitution 
ethanolic NaCN or KCN 
heat 
Haloalkane to primary amine (also makes NH4X) - CORRECT -Nucleophilic 
substitution 
Excess ethanolic NH3 with no further substitution 
HEAT under PRESSURE 
ac...
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OCR A Level CHEMISTRY Exam with Guaranteed Correct Answers
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Test for carbonates - correct answer - add dilute HCL 
- it makes carbon dioxide 
test for carbon dioxide by bubbling it through lime water 
 
Test for ammonium ions - correct answer -add sodium hydroxide 
-warm the mixture 
-hover damp red litmus paper over it , if it turns blue the ions are present 
 
Test for sulphate ionz (SO4 2-) - correct answer - add dilute HCL 
- then add BaCl2 
- BaSO4 is made which is insoluble in water so a white precipitate will be formed 
 
Test for Halides (Cl-,...
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