chemical changes Flashcards
(29 cards)
how do metal oxides form
metals react with oxygen in an oxidation reaction
what is reduction
loss of oxygen/ gain of electrons
what is oxidation
gain of oxygen / loss of electrons
what happens to metals when they react with other substances
metal atoms form positive ions
what is the reactivity of metal determined by
their tendency ti make positive ions
lost metals in order of activity
potassium sodium, lithium, calcium, magnesium, zinc, iron, copper
which two non metals are often included in ghe reactiviry serires
hydrogen and carbon
how can metals less reactive than carbon be extracted from their oxides
reduction with carbon
hat is typically made when an acid reacts with some metals
salts and hydrogen
how can acids be neutralised
sdding it to an alkali
what is the general word equation for anmetal hydroxide reacting with an acid
metal + acid> salt+ hydrogen
what what is an example of an alkali
soluble metal hydroxides
what is an example of a base
insoluble metal hydroxides wnd metal oxides
what is the general word equation for a metal hydroxide reacting with an acid
metal oxide+ acid> salt+ water
what is the general word equation for a metal oxide reacting with an acid
metal oxide+ acid > salt + water
what is the general word equation for a metal carbonate reacting with an acid
metal carbonate l+ acid> salt + water + carbon dioxide
what type of salt does hydrochloric acid produce
chloride
what type of salt does sulphuric acid produce
sulphate
what thpe of salt does nitric acid produce
nitrate
how can soluble salt be made
add acide in excess to a solid insoluble substance like metal, metal oxide, carbonate or hydroxide and filter of excess. crystalise the salt solution made
what type of ions do acids produce ina. soltuion
H+
what type of ions donalkalis produce in a solution
OH-
what is a PH scale
a scale from 0-14 that is a measure of acidity or alkalinity of a solution
what can be used to measure ph
universal indicator or phmeter
