C4 Flashcards
What are Group 1 elements called?
Alkali metals
Alkali metals include lithium, sodium, potassium, etc.
How many outer electrons do Group 1 elements have?
One outer electron
What happens to the melting points of Group 1 elements as you go down the group?
They decrease
What type of compounds do Group 1 elements form?
Ionic compounds
How does the reactivity of Alkali metals change as you move down Group 1?
Increases
What occurs when alkali metals are put in water?
They react vigorously
What are Group 7 elements called?
Halogens
How many electrons are in the outer shell of Group 7 elements?
Seven electrons
What type of molecules do Group 7 elements form?
Diatomic molecules
What happens to the boiling points and density of Group 7 elements as you go down the group?
They increase
As you go down Group 7, how does the reactivity of Halogens change?
Decreases
What is a displacement reaction?
A reaction where a more reactive element displaces a less reactive element from its compound
What are Group 0 elements called?
Noble Gases
What is a reactive characteristic of Noble Gases?
They are inert / unreactive
What happens to the boiling point and density of Noble Gases as you move down the group?
They increase
What are the properties of Transitional metals?
Hard, strong, shiny
How do Transitional metals compare to Alkali metals in terms of reactivity?
They are less reactive
What does a lit splint create in a test for Hydrogen?
A squeaky pop
What happens to a glowing splint in a test for Oxygen?
Relights
What does damp blue litmus paper do in a test for Chlorine?
Bleaches white
What occurs when Carbon Dioxide is bubbled through limewater?
It goes cloudy
What color does the flame turn for a Lithium Ion in a flame test?
Red
What color does the flame turn for a Sodium Ion in a flame test?
Yellow
What color does the flame turn for a Potassium Ion in a flame test?
Lilac
What color does the flame turn for a Calcium Ion in a flame test?
Brick Red
What color does the flame turn for a Copper (II) Ion in a flame test?
Blue - Green
What is the formula for a Lithium Ion?
Li+
What is the formula for a Sodium Ion?
Na+
What is the formula for a Potassium Ion?
K+
What is the formula for a Calcium Ion?
Ca 2+
What is the formula for a Copper (II) Ion?
Cu 2+
What is the formula for an Iron (II) Ion?
Fe 2+
What is the formula for an Iron (III) Ion?
Fe 3+
What is the formula for a Zinc (II) Ion?
Zn 2+
What is the color of the hydroxide precipitate for Iron (II) Ion?
Green
What is the color of the hydroxide precipitate for Iron (III) Ion?
Orange - Brown
What is the color of the hydroxide precipitate for Copper (II) Ion?
Blue
What is the color of the hydroxide precipitate for Calcium Ion?
White
What is the color of the hydroxide precipitate for Zinc (II) Ion?
White (dissolves in excess)
What is the formula of the hydroxide precipitate for Iron (II) Ion?
Fe (OH) 2
What is the formula of the hydroxide precipitate for Iron (III) Ion?
Fe (OH) 3
What is the formula of the hydroxide precipitate for Copper (II) Ion?
Cu (OH) 2
What is the formula of the hydroxide precipitate for Calcium Ion?
Ca (OH) 2
What is the formula of the hydroxide precipitate for Zinc (II) Ion?
Zn (OH) 2
What is the color of the precipitate in a halide test for Chloride Ion?
White precipitate
What is the color of the precipitate in a halide test for Bromide Ion?
Cream precipitate
What is the color of the precipitate in a halide test for Iodide Ion?
Yellow precipitate
What is the formula of the precipitate in a halide test for Chloride Ion?
AgCl
What is the formula of the precipitate in a halide test for Bromide Ion?
AgBr
What is the formula of the precipitate in a halide test for Iodide Ion?
AgI
How is a Flame Test carried out?
Cleaning a nichrome wire, dipping it into hydrochloric acid, rinsing in deionised water, dipping into sample, using it on a blue flame
How is a Halide Ion Test carried out?
Adding nitric acid and a few drops of silver nitrate solute
How is a hydroxide precipitate test carried out?
Adding sodium hydroxide to sample of unknown compound
How is a sulfate ion test carried out?
Adding nitric acid and barium nitrate to sample, white precipitate forms if sulfate ions are present
How is a carbonate ion test carried out?
Adding acid to sample, fizzing seen if carbonate ions are present producing CO2 gas
What are the advantages of instrumental methods?
Very sensitive, fast, accurate