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82 Cards in this Set
- Front
- Back
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How can you make an acid/alkali less hazardous?
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You can dilute it.
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Metal+Oxygen=
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Metal Oxide
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Metal + Water=
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Metal Hydroxide
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What happens to the contents in a oxidation or combustion reaction?
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The contents increase because they have gained oxygen.
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What is the test for carbon dioxide?
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The test for carbon dioxide is when limewater turns cloudy
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What is the test for hydrogen?
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A lighted wooden splint in a test tube and if there is a squeaky pop-hydrogen was produced.
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What gas is present in all acids?
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Hydrogen
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Why do bases react with acids?
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Bases react with acids to neutralise them.
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When heat is added to a metal carbonate, it decomposes to what?
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Metal Oxide and Carbon Dioxide
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How can you protect a metal from corrosion?
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Metals can be painted to be protected from corrosion
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Metal + Acids =
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Salt+Hydrogen
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Metal Oxides+Acid=
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Salt+Water
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Metal Hydroxides + Acid =
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Salt+Water
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Metal Carbonates + Acid =
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Salt+Water+Carbon Dioxide
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What are bases?
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An substance capable of reacting with an acid to form salt and water.
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What is an alkali?
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A base that is dissolved in water.
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What are hydroxides?
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Hydroxides are bases that are dissolved in water.
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Are all alkalis bases?
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Yes
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Why aren't all bases alkalis?
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Because not all bases can be dissolved in water.
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What is a displacement reaction?
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When a more reactive metal replaces a less reactive metal from a compound.
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What is a neutralisation reaction?
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It is the chemical reaction between an acid and a base
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What is combustion and its word equation?
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The process of burning. Metal + Oxygen = Metal Oxide
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What is oxidation?
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When a substance is combined with oxygen
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What is thermal decomposition?
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When heat is added the compound breaks down
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What is precipitation?
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When two soluble solutions form an insoluble solid.
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Name the most reactive metals:
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Potassium,Sodium,Calcium,Magnesium,Aluminium
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Name the medium reactive metals:
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Zinc,Iron,Lead and Copper
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Name the unreactive metals:
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Sliver and Gold
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How are reactive metals extracted and why?
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By electrolysis which means electricity is used to break. It is the only method that can be strong enough to break the metal-oxygen bond.
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How are medium reactive metals extracted?
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They are extracted by carbon reduction and electrolysis. But carbon reduction is a cheaper method.
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How are unreactive metals extracted?
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They are extracted by mining.
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What is a physical change?
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A change of state/appearance but its a reversible change.
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What is a chemical change?
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A change of appearance its a irreversible change.
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What is the main chemical in rocks?
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Calcium Carbonate (Limestone)
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Why were more reactive metals discovered later?
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They were discovered later because they were hard to find in their combined form and couldn't have been extracted until the invention of Electrolysis in 1800's
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Name these acids:
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HCl=
HNO3= HSO4= HCO3= |
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Name these acids:
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HCl=
HNO3= HSO4= HCO3= |
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Carbonate =
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CO3
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What makes up the fire triangle?
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Do less reactive metals react with acids?
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Yes less reactive metals only react with hot acids.
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Do less reactive metals react with acids?
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Yes less reactive metals only react with hot acids.
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Describe what Tarnish is
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Tarnish is the discolouration caused by the reaction between a metal and oxygen
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How can you remove tarnish? What are the safety precautions?
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You can remove tarnish by washing with a polish. However leaving moisture on its surface can cause corrosion.
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How can you remove tarnish? What are the safety precautions?
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You can remove tarnish by washing with a polish. However leaving moisture on its surface can cause corrosion.
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How can iron objects be protected against rusting?
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Iron objects can be prevented from rusting by preventing oxygen or water from reaching it.
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Word Equation For Rusting:
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Iron+Water+Oxygen = Hydrated Iron Oxide (rust)
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Two solutions are mixed, a new substance is formed.
Is this a precipitation or decomposition reaction? |
Precipitation
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A blue substance is heated. It turns black and a gas is given off. Is this a precipitation or decomposition reaction?
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Decomposition
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A blue substance is heated. It turns black and a gas is given off. Is this a precipitation or decomposition reaction?
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Ndecomposition
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A blue substance is heated. It turns black and a gas is given off. Is this a precipitation or decomposition reaction?
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Decomposition
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If there is less metal at the end of the reaction because it has been changed into a new substance. What word would you used to describe that?
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Corrosion
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Why do carbonates fizz when acids are added together?
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They fizz because they give off a gas called carbon dioxide.
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Why does it pop during the test for hydrogen gas?
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Because the flame ignites the hydrogen
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What happens if you test for carbon dioxide with a lighted splint?
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It doesn't pop, the flame goes out.
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Why do carbonates fizz when acids are added together?
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They fizz because they give off a gas called carbon dioxide.
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Why does it pop during the test for hydrogen gas?
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Because the flame ignites the hydrogen
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What happens if you test for carbon dioxide with a lighted splint?
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It doesn't pop, the flame goes out.
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Magnesium Hydroxide + Nitric Acid=
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Magnesium Nitrate + Water
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Why do carbonates fizz when acids are added together?
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They fizz because they give off a gas called carbon dioxide.
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Why does it pop during the test for hydrogen gas?
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Because the flame ignites the hydrogen
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What happens if you test for carbon dioxide with a lighted splint?
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It doesn't pop, the flame goes out.
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Magnesium Hydroxide + Nitric Acid=
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Magnesium Nitrate + Water
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What reactants would make Calcium Chloride + Water
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Calcium Hydroxide+Hydrochloric Acid
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Why do carbonates fizz when acids are added together?
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They fizz because they give off a gas called carbon dioxide.
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Why does it pop during the test for hydrogen gas?
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Because the flame ignites the hydrogen
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What happens if you test for carbon dioxide with a lighted splint?
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It doesn't pop, the flame goes out.
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Magnesium Hydroxide + Nitric Acid=
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Magnesium Nitrate + Water
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What reactants would make Calcium Chloride + Water
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Calcium Hydroxide+Hydrochloric Acid
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What do acids and alkalis react to form and in what reactions?
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Acids and alkalis react to form salts in neutralisation reactions
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How can you tell if a chemical reaction has taken place?
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Colour, Temperature Change or a gas is given off indicated by bubbles or flames.
Something new is always formed |
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How can you tell if a chemical reaction has taken place?
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Colour, Temperature Change or a gas is given off indicated by bubbles or flames.
Something new is always formed |
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What is Redox?
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Reduction and Oxidation
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How can you tell if a chemical reaction has taken place?
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Colour, Temperature Change or a gas is given off indicated by bubbles or flames.
Something new is always formed |
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What is Redox?
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Reduction and Oxidation
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Name the ingredients need for Combustion to take place:
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Give some examples of bases:
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Metal Oxide/Hydroxides/Carbonates
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What is reduction?
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The process or result of reducing or being reduced.
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What is another name for displacement reactions?
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Competition Reactions
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Why would there be no reaction when copper and magnesium oxide react?
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Because magnesium is more reactive than copper.
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Zinc reacts with copper sulphate to become zinc sulphate and copper. What colour would the zinc used be now? If zinc is grey and copper is brown.
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Browny grey
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Answer and complete the following :
Calcium Carbonate + Nitric Acid = |
Calcium Nitrate
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Answer and complete the following :
Calcium Carbonate + Nitric Acid = |
Calcium Nitrate+Water+Carbon Dioxide
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