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iGCSE Chemistry: Key Reactions
Terms in this set (38)
Are metal oxides acidic or basic?
If an element conducts electricity, is it typically a metal or a non-metal?
Which are described as acidic: metal oxides or non-metal oxides?
What do each of the following state symbols represent: (s), (l), (g), (aq)
(s) - solid. (l) - liquid. (g) - gas. (aq) - aqueous (in solution)
State the formula for the copper (II) ion
State the formula for the iron (II) ion
State the formula for the iron (III) ion
State the formula for the lead (II) ion
State the formula of the hydrogen ion
State the formula of the silver ion
State the formula of the zinc ion
What is the formula for magnesium chloride?
Are carbon dioxide and sulfur dioxide acidic or basic?
Both are acidic as carbon and sulfur are non-metals
Name the compound formed when magnesium reacts with oxygen
What colour flames to sulfur, carbon and magnesium produce when they burn in air?
Sulfur = blue, Carbon = yellow/orange, Magnesium = white
What happens when a small amount of hydrogen is burnt in a test tube?
How can metal carbonates be used to produce carbon dioxide?
Themal Decomposition: when metal carbonates are heated, they break down releasing carbon dioxide. Alternatively, the carbonate can be added to an acid.
State the colour of litmus in acidic and alkaline solutions
acidic = red alkali = blue
State the colour of methyl orange in acidic and alkaline solutions
acidic = red alkali = yellow
State the colour of phenolphthalein in acidic and alkaline solutions
acidic = colourless alkali = pink
What is the pH of a neutral solution?
What is the pH of a strong acid?
What is the universal indicator colour of a neutral solution?
What is the universal indicator colour of a pH 0-3 solution?
What is the universal indicator colour of a pH 11-14 solution?
What is an acid?
An acid is a source of hydrogen ions, H⁺
What is an alkali?
An alkali is a source of hydroxide ions, OH⁻
What is a base?
A substance which can neutralise an acid, forming salt and water only
acid + alkali →
acid + alkali → salt + water
acid + base →
acid + base → salt + water
acid + metal →
acid + metal → salt + hydrogen
acid + metal carbonate →
acid + metal carbonate → salt + carbon dioxide + water
Describe the observations of the reaction of aluminium and dilute hydrochloric acid
fizzing and metal disappears
Give the formula of sulfuric acid
What two observations can be made when a metal reacts with an acid?
Bubbles. Metal disappears.
Is ammonia acidic or basic?
Describe the test for carbon dioxide gas
Bubble the gas through limewater and see if it goes cloudy
Describe the test for hydrogen gas
Use a lit splint to see if the gas pops
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