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iGCSE Chemistry: Key Reactions - test myself

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Are metal oxides acidic or basic?
Basic
Are non-metal oxides acidic or basic?
Acidic
If an element conducts electricity, is it typically a metal or a non-metal?
Metal
If an element doesn't conducts electricity, is it a metal or a non-metal?
Non-Metal
Which are described as acidic: metal oxides or non-metal oxides?
non-metal oxides
Which are described as basic: metal oxides or non-metal oxides?
metal oxides
Balance the equation for the reaction: ___ HCl(aq) + ___ MnO₂(s) → ___MnCl₂(aq) + ___H₂O(l) + ___ Cl₂(g)
4 HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)
Balance the following equation: WO₃ + H₂ → W + H₂O
WO₃ + 3H₂ → W + 3H₂O
What do each of the following state symbols represent: (s), (l), (g), (aq)
(s) - solid. (l) - liquid. (g) - gas. (aq) - aqueous (in solution)
If ammonium nitrate NH₄NO₃ contains the NO₃⁻ ion, what is the formula for the other ion?
NH₄⁺ (ammonium ion)
If calcium carbonate has a Ca²⁺ ion, what is the formula for the other ion?
CO₃²⁻ (carbonate ion)
If iron oxide has the formula Fe₂O₃, what is the name and formula of the iron ion?
iron (III) ion: Fe³⁺
If nitric acid (HNO₃) produces H⁺ Ions, what is formula for the other ion?
NO₃⁻ (nitrate ion)
If sulfuric acid (H₂SO₄) produces 2H⁺, what must the other ion be?
SO₄²⁻ (sulfate ion)
If water produces H⁺, what must the other ion be?
OH⁻ (hydroxide ion)
State the formula for the copper (II) ion
Cu²⁺
State the formula for the iron (II) ion
Fe²⁺
State the formula for the iron (III) ion
Fe³⁺
State the formula for the lead (II) ion
Pb²⁺
State the formula of the ammonium ion
NH₄⁺
State the formula of the carbonate ion
CO₃²⁻
State the formula of the hydroxide ion
OH⁻
State the formula of the nitrate ion
NO₃⁻
State the formula of the silver ion
Ag⁺
State the formula of the sulfate ion
SO₄²⁻
State the formula of the zinc ion
Zn²⁺
State the formula of the zinc ion
Zn²⁺
What is the formula for aluminium chloride?
AlCl₃
What is the formula for aluminium nitrate?
Al(NO₃)₃
What is the formula for aluminium oxide?
Al₂O₃
What is the formula for aluminium sulfate?
Al₂(SO₄)₃
What is the formula for aluminium sulfide?
Al₂S₃
What is the formula for ammonium chloride?
NH₄Cl
What is the formula for ammonium sulfide?
(NH₄)₂S
What is the formula for calcium bromide?
CaBr₂
What is the formula for calcium hydroxide?
Ca(OH)₂
What is the formula for calcium nitrate?
Ca(NO₃)₂
What is the formula for calcium nitride?
Ca₃N₂
What is the formula for copper (II) fluoride
CuF₂
What is the formula for copper (II) sulfide?
CuS
What is the formula for iron (II) oxide
FeO
What is the formula for iron (II) phosphide?
Fe₃P₂
What is the formula for iron (III) bromide?
FeBr₃
What is the formula for iron (III) nitride
FeN
What is the formula for lithium carbonate?
Li₂CO₃
What is the formula for lithium chloride?
LiCl
What is the formula for lithium nitride?
Li₃N
What is the formula for magnesium carbonate?
MgCO₃
What is the formula for magnesium chloride?
MgCl₂
What is the formula for magnesium iodide?
MgI₂
What is the formula for magnesium oxide?
MgO
What is the formula for magnesium sulfate?
MgSO₄
What is the formula for potassium bromide?
KBr
What is the formula for potassium chloride?
KCl
What is the formula for potassium hydroxide?
KOH
What is the formula for potassium sulfate?
K₂SO₄
What is the formula for potassium sulfide?
K₂S
What is the formula for silver carbonate?
Ag₂CO₃
What is the formula for silver nitrate?
AgNO₃
What is the formula for silver sulfate?
Ag₂SO₄
What is the formula for sodium chloride?
NaCl
What is the formula for sodium fluoride?
NaF
What is the formula for sodium hydroxide?
NaOH
What is the formula for sodium nitrate?
NaNO₃
What is the formula for sodium oxide?
Na₂O
What is the formula for sodium phosphide?
Na₃P
What is the formula for strontium phospide?
Sr₃P₂
What is the formula for vanadium (V) oxide?
V₂O₅
What is the formula for zinc carbonate?
ZnCO₃
What is the formula for zinc nitrate?
Zn(NO₃)₂
What is the formula for zinc sulfate?
ZnSO₄
Are carbon dioxide and sulfur dioxide acidic or basic?
Acidic as carbon and sulfur are non-metals
Hydrogen and helium have both been used in balloons. State one advantage of using helium instead of hydrogen
Helium is not flammable
Name the compound formed when magnesium reacts with oxygen
magnesium oxide
What colour flames to sulfur, carbon and magnesium produce when they burn in air?
Sulfur = blue, Carbon = yellow/orange, Magnesium = white
What happens is a large amount of hydrogen is burnt?
Explosion
What happens when a small amount of hydrogen is burnt in a test tube?
Squeaky pop
What observation is made when carbon burns in air?
Yellow flame
What observation is made when sulfur burns in air?
Blue Flame
What observations are made when magnesium burns in air?
Bright white light. White solid left behind.
When carbon burns in air, is the oxide acidic or basic?
Acidic
When magnesium burns in air, is the oxide acidic or basic?
Basic
When sulfur burns in air, is the oxide acidic or basic?
Acidic
How can metal carbonates be used to produce carbon dioxide?
Themal Decomposition: when metal carbonates are heated, they break down
Write the word and chemical equation for the thermal decompostion of calcium carbonate, CaCO₃
calcium carbonate → calcium oxide + carbon dioxide CaCO₃ → CaO + CO₂
What is the pH of a neutral solution?
7
What is the pH of a strong acid?
0-3
What is the pH of a strong alkali?
11-14
What is the pH of a weak acid?
4-6
What is the pH of a weak alkali?
8-10
What is the typical range of the pH scale?
0-14
What scale typically ranges between 0 and 14?
pH scale
With universal indicator, what is the pH of a blue solution?
8-10
With universal indicator, what is the pH of a green solution?
7 (neutral)
With universal indicator, what is the pH of a purple solution?
11-14
With universal indicator, what is the pH of a red solution?
0-3
With universal indicator, what is the pH of a yellow solution?
4-6
What is the universal indicator colour of a neutral solution?
Green
What is the universal indicator colour of a pH 0-3 solution?
Red
What is the universal indicator colour of a pH 11-14 solution?
Purple
What is the universal indicator colour of a pH 4-6 solution?
Yellow
What is the universal indicator colour of a pH 7 (neutral) solution?
Green
What is the universal indicator colour of a pH 8-10 solution?
Blue
What is the universal indicator colour of a strongly acid solution?
Red
What is the universal indicator colour of a strongly alkali solution?
Purple
What is the universal indicator colour of a weakly acid solution?
Yellow
What is the universal indicator colour of a weakly alkali solution?
Blue
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⁻
Can a base neutralise an acid?
Yes
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
Describe the observations of the reaction of calcium carbonate and dilute hydrochloric acid
fizzing and solid disappears
Describe the observations of the reaction of magnesium and dilute sulfuric acid
fizzing and metal disappears
Describe the observations of the reaction of zinc and dilute hydrochloric acid
fizzing and metal disappears
Give the formula of sulfuric acid
H₂SO₄
Give the name of the substance which has formula HNO₃
nitric acid
Give the name of the substance which has the formula HCl (aq)
hydrochloric acid
hydrochloric acid + magnesium →
hydrochloric acid + magnesium → magnesium chloride + hydrogen
hydrochloric acid + sodium hydroxide →
hydrochloric acid + sodium hydroxide → sodium chloride + water
nitric acid + calcium carbonate →
nitric acid + calcium carbonate → calcium nitrate + carbon dioxide + water
sulfuric acid + copper oxide →
sulfuric acid + copper oxide → copper sulfate + water
What two observations can be made when a metal reacts with an acid?
Bubbles. Metal disappears.
Write the word equation to represent the reaction between copper oxide and sulfuric acid
sulfuric acid + copper oxide → copper sulfate + water
Write the word equation to represent the reaction between nitric acid and copper carbonate
nitric acid + copper carbonate → copper nitrate + carbon dioxide + water
Is ammonia acidic or basic?
Basic
Is iron (III) hydroxide acidic or basic?
Basic (as metal hydroxides are basic)
Is magnesium oxide acidic or basic?
Basic (as magnesium is a metal)
What is an alkali compared to a base?
Alkalis are bases that are soluble in water
A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.
Carbon dioxide
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
In the test of a gas, a lit splint gives a squeaky pop. What is the gas?
Hydrogen
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