Combined Foundation Flashcards
What name is given to a list of metals that are ordered by their reactivity?
Reactivity series
In terms of electrons what makes some metals more reactive than others?
They lose their outershell electrons more easily
Why are gold and silver found naturally as elements in the earths crust?
They are very unreactive
What is an ore
Rock containing enough or a metal compound to be economically worth extracting
How are metals less reactive then carbon extracted?
Reduction with carbon
What are oxidation and reduction?
Oxidation = addition of oxygen
Reduction = removal of oxygen
Why can metals like potassium and aluminium not be extracted by reduction with carbon ?
They are more reactive than carbon
How are metals more reactive than carbon extracted from their ores?
Electrolysis
What is a displacement reaction?
A more reactive substance takes the place of a less reactive substance
In terms of pH what is an acid?
A solution with a pH of less than 7
In terms of pH what is a neutral solution
pH 7
In terms of H+ ions , what is an acid?
a substance that releases H+ ions when dissolved in water
What re the names and formula of the three main acids?
Sulfuric - H2SO4, Hydrochloric - HCl, and nitric - HNO3
How do you measure the pH of a substance?
universal indicator or pH probe
What are the products of a reaction between an metal and an acid?
Salt + Hydrogen
