Flashcards in Chemical Changes Deck (43):
Metal oxides are?
The product of the oxidation reaction of Metal and Oxygen.
Metal produces what form of ion?
What is a displacement reaction?
A reaction when a more reactive metal displaces a less reactive metal.
How does Potassium react when exposed to water?
How does Sodium react when exposed to water?
How does Lithium react when exposed to water?
How does Calcium react when exposed to water?
How does Calcium react when exposed to dilute acid?
How does Magnesium react when exposed to dilute acid?
How does Zinc react when exposed to dilute acid?
More slowly than magnesium
How does Iron react when exposed to dilute acid?
More slowly than zinc
How does Copper react when exposed to dilute acid?
How does Silver react when exposed to dilute acid?
How does Gold react when exposed to dilute acid?
How is the order of reactivity affected?
Via a metals tendency to form its positive ion.
Why are most metals found as compounds?
As most, unlike gold, are reactive enough to bond to other elements?
How are most metals less reactive than carbon extracted?
Reduction with Carbon
Oxidation in terms of electrons is?
Oxidation is the loss of electrons
Reduction in terms of electrons is?
Reduction is the gain of electrons
What are the products of the reactants metal and an acid?
Metal Salt and hydrogen
How are acids neutralised?
Alkalis (soluble metal hydroxides) and basis (insoluble metal hydroxides and metal oxides).
In a neutralization reaction, what are the products?
Metal salt and Water
In a neutralization reaction which uses metal carbonates, what are the products?
Metal salts, water and carbon dioxide.
How can a soluble salt be produced?
Reacting an acid with a solid insoluble substance.
Solid salts are formed by?
Crystallization of a soluble salt
Acids form what form of ion in an aqueous solution?
Alkalis form what form of ion in an aqueous solution?
What is Alkalinity measured in.
pH 0-14, measured using Universal indicator
In a neutralisation reaction, what is formed?
Water, as OH- and H+ ions bond together
What is a measuring by titration?
The method by which one can work out neutralising quantities of Acids and Alkalis.
What is a strong acid?
An acid which completely ionis'.
Name some examples of strong acids?
Hydrochloric, nitric and sulfuric acids.
What is a weak acid?
An acid which only partially ionis'.
Name some examples of weak acids?
Ethanoic, citric and carbonic acids.
As pH decreases by one unit what happens?
The hydrogen ion concentration increases by a factor of 10
What is required in electrolysis?
Free ions which can pass through a solution.
A solution which has free ions and can conduct electricity is an?
In electrolysis, the positive electrode is?
In electrolysis, the negative electrode is?
What happens at the electrodes during electrolysis?
Ions are discharged forming elements.
What are the products of electrolysis of ionic compounds?
Metals at the cathode and
Non-metals at the anode.
When is electrolysis used in extracting metals?
When a metal is more reactive than carbon or reacts with carbon.