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Which ions make solutions acidic?
Hydrogen ions make solutions acidic.
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Which ions make solutions alkaline?
Hydroxide ions make solutions alkaline?
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What does Universal Indicator contain?
Universal indicator contains a mixture of indicators which change to a number of different colours depending on the acid or alkali being tested.
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ACID + ALKALI = METAL + ACID =
ACID + ALKALI = SALT + WATER METAL + ACID = SALT + HYDROGEN
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Name the salt produced by reacting Hydrochloric acid with magnesium.
Magnesium chloride is the salt produced by reacting Hydrochloric acid with Magnesium.
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Name the salt produced by reacting sulphuric acid with copper oxide.
Copper Sulphate is the salt produced by reacting Sulphuric acid with Copper oxide.
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Name the salt produced by reacting nitric acid with zinc.
Zinc nitrate is the salt produced by reacting nitric acid with zinc.
7 of 18
Explain what is meant by the term 'exothermic reaction'.
An exothermic reaction is one in which overall, heat energy is given out.
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Give two examples of exothermic reactions.
Examples of exothermic reactions include: combustion, oxidation reactions, neutralisation (acid/alkali reactions).
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Explain what is meant by the term 'endothermic reaction'.
An endothermic reaction is one that takes in energy from surroundings.
10 of 18
Which substances increase the rate of chemical reactions without being changed themselves?
Catalysts increase the rate of reactions without being changed themselves.
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Use the particle/collision theory to explain why increasing the temperature increases the rate of a reaction.
Increasing the temperature increases the speed of the reacting particles so they collide more frequently and more energetically. This increases the rate of reaction.
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Use particle/collision theory to explain why increasing the concentration of reactants in solutions increases the rate of a reaction.
Increasing the concentration of reactants in solutions brings the particles closer together. This increases the frequency of collisions and so increases the rate of reaction.
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Reacting mass calculations - When 12 g of carbon is burned in air, 44 g of carbon dioxide is produced. What mass of carbon is needed to produce 11 g of carbon dioxide?
12 g of carbon makes 44 g of carbon dioxide. 12 ÷ 44 g of carbon will make 1 g of carbon dioxide. You will need 11 × (12 ÷ 44 g) = 3 g of carbon to make 11 g of carbon dioxide.
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Product mass calculations - When 5.0 g of calcium carbonate is decomposed by heating, it produces 2.2 g of carbon dioxide. What mass of calcium carbonate is needed to produce 8.8 g of carbon dioxide?
5 g of calcium carbonate makes 2.2 g of carbon dioxide. 5 ÷ 2.2 g of calcium carbonate will make 1 g of carbon dioxide. You will need 8.8 × (5 ÷ 2.2 g) = 20 g of carbon to make 8.8 g of carbon dioxide.
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Explain how filtration can be a useful technique during the synthesis of chemical products.
Filtration is often used to separate an insoluble solid from a solution. if the product is dissolved then filtration is often used to separate solid impurities from the product.
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What is meant by the term 'percentage yield' of a reaction?
The percentage yield of a reaction is the actual yield of a product compared with the maximum theoretical yield as a percentage. Percentage yield = (actual yield / predicted yield x 100)
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Give three reasons why it is often not possible to obtain all of the calculated predicted yield of a product.
Reasons why it is often not possible to obtain all of the calculated yield of a product are: The reaction doesn't go to completion, some of the product may be lost when it is separated from reaction mixture, reaction may do other reactions = no prod.
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Other cards in this set

Card 2

Front

Which ions make solutions alkaline?

Back

Hydroxide ions make solutions alkaline?

Card 3

Front

What does Universal Indicator contain?

Back

Preview of the front of card 3

Card 4

Front

ACID + ALKALI = METAL + ACID =

Back

Preview of the front of card 4

Card 5

Front

Name the salt produced by reacting Hydrochloric acid with magnesium.

Back

Preview of the front of card 5
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