identifying gases and ions (51-53) (paper 1)

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

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Front (Question)

what is the chemical test and result for hydrogen gas

Back (Answer)

• lit split = squeaky pop

Front (Question)

what is the chemical test and result for oxygen

Back (Answer)

• glowing splint = relights

Front (Question)

what is the chemical test and result for carbon dioxide

Back (Answer)

• add HCl • bubble through limewater = goes cloudy white

Front (Question)

what is the chemical test and result for chlorine gas

Back (Answer)

• damp blue litmus paper = may turn red then bleached white

Front (Question)

what is the chemical test and result for ammonia gas

Back (Answer)

• add NaOH and warm gently • damp red litmus paper = turns blue

Front (Question)

what is the chemical test and result for water

Back (Answer)

• white anhydrous copper sulfate = blue

Front (Question)

what is the physical test and result for water

Back (Answer)

• heat until boiling = will boil at 100

Front (Question)

how is a flame test carried out

Back (Answer)

• dip a nichrome wire into an acid (must be unreactive, colourless & high melting point) • dip into the ionic solid • put it in roaring bunsen flame

Front (Question)

why do we put the nichrome wire in a roaring bunsen flame

Back (Answer)

so the colour of the flame will not interfere

#10

Front (Question)

what is the colour of the flame for lithium

Back (Answer)

red

#11

Front (Question)

what is the colour of the flame for sodium

Back (Answer)

yellow

#12

Front (Question)

what is the colour of the flame for potassium

Back (Answer)

lilac

#13

Front (Question)

what is the colour of the flame for calcium

Back (Answer)

red-orange

#14

Front (Question)

what is the colour of the flame for copper

Back (Answer)

blue-green

#15

Front (Question)

when do you do a flmae test

Back (Answer)

for a metal ion

#16

Front (Question)

what is the chemical test and result for sulphat

Back (Answer)

• add HCl • add BaCl2 = white precipitate

#17

Front (Question)

what do you do when testing for a metal ion in a solution

Back (Answer)

add NaOH

#18

Front (Question)

what do you do when identifying copper

Back (Answer)

add NaOH

#19

Front (Question)

what do you do when identifying iron

Back (Answer)

add NaOH

#20

Front (Question)

what is the colour of the precipitate fromed for copper

Back (Answer)

blue precipitate (Cu(OH)2)

#21

Front (Question)

what is the colour of the precipitate formed for iron (II)

Back (Answer)

green precipitate (Fe(OH)2)

#22

Front (Question)

what is the colour of the precipitate formed from iron (III)

Back (Answer)

brown precipitate (Fe(OH)3)

#23

Front (Question)

how do you test for non-metall ions (chlorine, bromine, iodine)

Back (Answer)

• add HNO3 (aq) • add AgNO3 (aq)

#24

Front (Question)

what is the result for identifying chloride

Back (Answer)

white precipitate (AgCl)