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iGCSE Chemistry: Acids & neutralisation - test myself

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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 copper chloride has the formula CuCl₂, what is the formula of the copper ion?
Cu²⁺
If iron chloride has the formula FeCl₂, what is the formula of the iron ion?
Fe²⁺
If iron chloride has the formula FeCl₃, what is the formula of the iron ion?
Fe³⁺
If iron oxide has the formula Fe₂O₃, what is the name and formula of the iron ion?
iron (III) ion: Fe³⁺
If iron oxide has the formula FeO, what is the formula of the iron ion?
Fe²⁺
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⁺
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?
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⁻
(Triple only) Describe how to carry out an acid-alkali titration
1) Pipette 25cm³ of alkali into a conical flask. 2) Add indicator. 3) Fill a burette with acid, record the initial volume. 4) Whilst swirling the flask, add the acid dropwise until the indicator changes colour. 5) Record the volume and calculate the volume of acid which was added. 6) Repeat until two concordant results (within 0.2cm³ of each other). 7) Result is the average of all concordant results.
(Triple only) Draw a burette
DRAWING
(Triple only) Draw a pipette
DRAWING
What is defined as a proton acceptor?
An alkali
What is defined as a proton donor?
An acid
An acid is called a proton _________
An acid is a proton donor
An alkali is called a proton _________
An alkali is a proton acceptor
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 equation to represent the reaction between copper oxide and sulfuric acid
sulfuric acid + copper oxide → copper sulfate + water
Write the 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