End Term 2020 Flashcards
Define a salt
Formed when hydrogen ions of acids are completely or partially replaced by metals
State four types of salts
Acid salts, basic salts, normal salts, double salts
What is hygroscopy
Process by which salts absorb moisture but fonnot change their state when exposed to air
What is efflorescence
The process by which hydrated salts lose water if crystalization when exposed to air
What are deliquescent salts
Salts that absorb water vapour and form solutions
Particals found in an atom
Protons, electrons, neutrons
Calcium nitrate formula
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Ammonium chloride formula
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Sodium oxide formula
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What i sthe least reactive?
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1st ionization energy
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Difference btwn 1st and 2nd ionization energy
Second ionization energy is higher because more energy is required to remove electrons from a positively charged ion than a neutral ion
Difference btwn luminous and non luminous flame
Non luminous is hotter
Non luminous flames appear hotter
What is used to relieve heart burn
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Why is a luminous foame preferred for lighting
Produces more light(brighter) ASK THOUGH
Does giant ionic structure conduct electricity
No because the electrons ate in fixed positions
Metallic |electrical solid| conductivity
Conducts, conducts
Ionic |electrical solid| conductivity
Does not conduct, conducts
Covalent |electrical solid| conductivity|
Does not conduct, does not conduct
Allotropes of carbon
Graphite, diamond
Why does graphite conduct electrivity but diamond does not
Graphite contains delocalised electrons that facilitate conductivity while all electrons in graphite are used up during bonding
Why is diamond very hard
Strong chemical bonds form a 3d structure ULIZA BABEZ💀
Why is graphite used as a lubricant
Weak van der waal forces between graphite layers allow them to slide over each other making graphite slippery
