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AQA GCSE CHEMISTRY Higher Tier Paper 1 JUNE 2023 QUESTION PAPER AND MARK SCHEME
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AQA GCSE CHEMISTRY Paper 1 Higher Tier JUNE 2023 MARK SCHEME
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This is the final mark scheme
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GCSE Chemistry C8 Study Guide Exam And Complete Answers 2024.
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What is the rate of reaction? - Answer How fast reactants turn into products 
 
What is reaction rate important in? - Answer The chemical industry and your body 
 
Why is reaction rate important in the chemical industry? - Answer To make sure products are made quickly and cheaply 
 
What are the two ways you can work out the rate of a chemical reaction? - Answer How quickly the reactants are used up and how quickly the products are made 
 
What are the three techniques you can use to get...
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GCSE Chemistry C8 Study Guide Exam And Complete Answers 2024.
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What is the rate of reaction? - Answer How fast reactants turn into products 
 
What is reaction rate important in? - Answer The chemical industry and your body 
 
Why is reaction rate important in the chemical industry? - Answer To make sure products are made quickly and cheaply 
 
What are the two ways you can work out the rate of a chemical reaction? - Answer How quickly the reactants are used up and how quickly the products are made 
 
What are the three techniques you can use to get...
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GCSE AQA Chemistry Topic 9- Chemistry of the Atmosphere Test Questions Well Answered 100% 2024.
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What is the % of nitrogen in our current atmosphere? - Answer 80 
 
What is the % of oxygen in our current atmosphere? - Answer 20 
 
What is the % of carbon dioxide in our current atmosphere? - Answer 0.04 
 
What is the % of argon in our current atmosphere? - Answer 0.9 
 
Describe how the early atmosphere was formed? - Answer Frequent volcanic eruptions released gases 
 
Name the main gases in the early atmosphere? - Answer Carbon dioxide, methane, ammonia and water vapour 
 
Expl...
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Topic 6 Chemistry Gcse Practice Exam Fully Solved 2024.
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what is rate of reaction - Answer how fast the reactants are changed into products 
 
example of slow reaction - Answer rusting of metal 
 
example of fast reaction - Answer explosion 
 
how does temp affect rate of reaction - Answer the higher the temp the faster the reaction 
 
how does concentration (or pressure of gases) affect rate of reaction - Answer the more the concentration the faster the reaction 
 
how does surface area affect the rate of reaction - Answer the larger the ...
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GCSE Chemistry Flame Test Questions With All Correct Answers 2024.
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Lithium(flame) - Answer Crimson 
 
Sodium(flame) - Answer Yellow 
 
Potassium(flame) - Answer Lilac 
 
Calcium(flame) - Answer orange/red 
 
Lithium(flame) - Answer Crimson 
 
copper(flame) - Answer green 
 
Magnesium(flame) - Answer No colour/white 
 
copper - Answer blue precipitate when sodium hydroxide added 
 
Iron(II) - Answer green precipitate when sodium hydroxide added 
 
Iron(III) - Answer brick red precipitate when sodium hydroxide added 
 
calcium - Answer white...
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GCSE Chemistry Separating Mixtures Study Guide Exam With Solved Solutions 2024.
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Mixture - Answer made up of two or more substances that are not chemically combined 
 
3 properties of compounds - Answer -fixed composition, the same ratio of each element 
-only chemical reactions can separate elements 
-chemical bonds between atoms 
 
3 properties of mixtures - Answer -no fixed composition, the amount of the different substances can change 
-can be separated easily, using the properties of the different substances 
-no chemical bonds between atoms/compound in mixtur...
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GCSE Chemistry – Atmosphere Unit Exam With Verified Solutions 2024.
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Air - Answer A mixture of gases. 78% Nitrogen, 21% Oxygen, 0.04% carbon dioxide and other gases. 
 
Global Warming - Answer The rise in mean surface temperatures on the earth, thought to be due to increasing amounts of greenhouse gases such as carbon dioxide 
 
Greenhouse gas - Answer A gas in the atmosphere that contributes to the greenhouse effect , such as carbon dioxide 
 
Photosynthesis - Answer The process where green plants made glucose, by taking in carbon dioxide and producing o...
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GCSE Chemistry Chapter C5 Chemical Changes Pre Exam Fully Solved 2024.
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How metals can be placed in order of reactivity - Answer By their reactions with water and dilute acid 
 
When metals react with water or dilute acids - Answer Hydrogen gas is given off. The gas 'pops' with a lighted spill. 
 
OIL RIG - Answer oxidation is loss (of electrons), reduction is gain (of electrons) 
 
A more reactive metal - Answer Will displace a less reactive metal from its aqueous solution 
 
The non-metals hydrogen and carbon - Answer can be given positions in the reac...
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GCSE Chemistry – Electrolysis Study Guide Exam And Actual Answers 2024.
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What is electrolysis? - Answer The breaking down of a substance using electricity 
 
Types of electrolysis - Answer Of aqueous ionic compounds 
Of molten ionic compounds 
 
Ionic compound - Answer a compound composed of positive(cations) and negative ions(anions) 
 
Why can't ionic compounds conduct electricity as solid? - Answer The electrons aren't free to move and carry the charge through the structure 
 
What is an electrolyte? - Answer a liquid/solution that conducts electricit...
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GCSE Chemistry Energy Changes Final Exam Well Answered 2024.
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What is an exothermic reaction? - Answer A reaction that causes a rise in temperature to surroundings- it releases energy 
 
What is an endothermic reaction? - Answer A reaction that causes a decrease in temperature in the surroundings-it takes in energy 
 
If a reversible reaction if exothermic in one direction what will it be in the reverse direction? - Answer Endothermic 
 
What must happen for bonds to be broken in a chemical reaction? - Answer Reacting particles must collide with su...
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