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3.4 - Atmosphere + Acids

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

four most abundant gases in dry air by percentage

Back (Answer)

78%​ ​nitrogen 21%​ ​oxygen ​0.9%​ ​argon​ ​0.037%​ ​carbon​ ​dioxide

#2
Front (Question)

how to determine volume of oxygen in air using copper

Back (Answer)

●​air​ ​passed​ over​ ​copper​ ​being​ ​heated​ ​with​ ​a Bunsen​ ​burner ● All​ ​oxygen​ ​in​ ​air​ ​will​ ​react​ ​with​ ​copper ● As​ ​it​ ​is​ ​passed,​ ​the​ ​volume​ ​of​ ​air​ ​will​ ​decrease ● Continued​ ​until​ ​the​ ​volume​ ​stops​ ​decreasing,​ ​then​ ​record​ ​the​ ​volume​ ​of remaining​ ​air ● There​ ​would​ ​be​ ​about​ ​79cm3​ ​​ ​left,​ ​showing​ ​that​ ​21cm3​ ​​ ​of​ ​the​ ​original​ ​100cm3​ ​​ ​of air​ ​was​ ​oxygen ● The​ ​reaction​ ​happening​ ​in​ ​this​ ​case​ ​(with​ ​copper)​ ​is: ​ ​copper​ ​+​ ​oxygen​ ​->​ ​copper​ ​(II)​ ​oxide​ ​//​ ​2Cu​ ​(s)​ ​+​ ​O​2​​ ​(g)​ ​->​ ​CuO​ ​(s) - Would​ ​notice​ ​black​ ​copper​ ​oxide​ ​forming

#3
Front (Question)

describe combustion of elements in oxygen

Back (Answer)

combustion is an example of oxidation oxidation -> gains oxygen

#4
Front (Question)

combustion of elements in magnesium

Back (Answer)

2Mg + O2 –> 2MgO

#5
Front (Question)

combustion of elements in hydrogen

Back (Answer)

2H2 + O2 –> 2H2O

#6
Front (Question)

combustion of elements in sulfur

Back (Answer)

S + O2 –> SO2

#7
Front (Question)

describe formation of carbon dioxide from thermal decomposition of metal carbonates -> copper (III) carbonate

Back (Answer)

metal carbonate —> metal oxide + carbon dioxide e.g. copper (III) carbonate CuCO3 –> CuO + CO2

#8
Front (Question)

carbon dioxide is a

Back (Answer)

green house gas

#9
Front (Question)

greenhouse gas effect

Back (Answer)

o Electromagnetic​ ​radiation​ ​at​ ​most​ ​wavelengths​ ​from​ ​the​ ​sun​ ​passes through​ ​the​ ​Earth’s​ ​atmosphere o The​ ​Earth​ ​absorbs​ ​some​ ​radiation​ ​and​ ​thus​ ​warms​ ​up​ ​(essential​ ​for​ ​life​ ​on Earth).​ ​But​ ​some​ ​heat​ ​is​ ​radiated​ ​from​ ​the​ ​Earth​ ​as​ ​infrared​ ​radiation. o Some​ ​of​ ​this​ ​IR​ ​radiation​ ​is​ ​absorbed​ ​by​ ​greenhouse​ ​gases​ ​in​ ​the atmosphere o Atmosphere​ ​warms​ ​up​ ​leading​ ​to​ ​the​ ​greenhouse​ ​effect​ ​and​ ​global warming

#10
Front (Question)

phenolphthalein in alkaline

Back (Answer)

pink

#11
Front (Question)

phenolphthalein in acid

Back (Answer)

colourless

#12
Front (Question)

methyl orange in alkaline

Back (Answer)

yellow

#13
Front (Question)

methyl orange in acid

Back (Answer)

red

#14
Front (Question)

blue litmus paper in alkaline

Back (Answer)

stays blue

#15
Front (Question)

blue litmus paper in acid

Back (Answer)

red

#16
Front (Question)

red litmus paper in alkaline

Back (Answer)

stays red

#17
Front (Question)

red litmus paper in acid

Back (Answer)

blue

#18
Front (Question)

pH 7

Back (Answer)

neutral

#19
Front (Question)

< pH 7

Back (Answer)

acidic

#20
Front (Question)

> pH 7

Back (Answer)

alkaline

#21
Front (Question)

use of universal indicator to measure pH of aq solution

Back (Answer)

• add solution to universal indicator paper and observe colour based on pH scale

#22
Front (Question)

acids produce what ions

Back (Answer)

H+ in aqueous solutions

#23
Front (Question)

alkalis produces what ions

Back (Answer)

OH- in aqueous solutions

#24
Front (Question)

alkalis can neutralise acids with what equation

Back (Answer)

• between an acid and base H+(aq) + OH-(aq) –> H2O(l)