gases Flashcards by Maryam Ilyasova | Brainscape

Q

gases in air

A

78% nitrogen
21% oxygen
1% argon

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Q

magnesium reacting with oxygen

A

magnesium oxide
2Mg + O2 —> 2MgO
basic

burns vigorously
bright white light

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Q

carbon reacting with oxygen

A

carbon dioxide
C + O2 —> CO2
acidic

burns with bright yellow sparks

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Q

sulfur reacting with oxygen

A

sulphur dioxide
S + O2 —> SO2
acidic

burns with bright blue flame

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Q

hydrochloric acid and marble chips equation

A

CaCo3 + 2HCl —> CaCl2 + CO2 + H2O

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Q

oxygen test

A

light a splint
blow it out
while glowing place in gas

present - splint relights

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Q

hydrogen test

A

hold flame to mouth of tube containing gas

present- gas ignites with squeaky pop

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Q

carbon dioxide test

A

bubble gas through limewater

present- limewater colourless—> cloudy

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Q

ammonia test

A

hold damp red litmus in gas

present- red —> blue

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Q

chlorine test

A

hold damp blue litmus in gas

present- blue —> red and then bleached

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