IGCSE CHEMISTRY SOLVED past paper 0620/63/O/N/22 - October / November 2022 Paper 63

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Cambridge IGCSE Chemistry paper 63 October / November 2022, Solved and Explained.

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Introduction: (00:00)

Q 01: ( 00:10)
Hydrogen chloride is a colourless gas that is soluble in water and denser than air.
Hydrogen chloride can be made by reacting sodium chloride with concentrated sulfuric acid.
The diagram shows some of the apparatus a teacher used to make hydrogen chloride gas and to
measure the volume of gas made.

Q 02: (02:41)
A student investigated the rate of the reaction between sodium metabisulfite and potassium iodate
at different temperatures.
Five experiments were done at different temperatures.
(a) Experiment 1
● 70cm3
of aqueous potassium iodate was measured using a 100cm3
measuring cylinder
and poured into a 250cm3
beaker.
● 5cm3
of aqueous starch was measured using a 10cm3
measuring cylinder and poured into
the beaker containing the aqueous potassium iodate.
● 5cm3
of aqueous sodium metabisulfite was measured using a clean 10cm3
measuring
cylinder and poured into the beaker. At the same time a stop-clock was started.
● The mixture was stirred until a sudden colour change was seen.
● The stop-clock was stopped and the temperature of the mixture in the beaker was
measured using a thermometer.
● The beaker was rinsed with distilled water.
Experiment 2
● 70cm3
of aqueous potassium iodate was measured using a 100cm3
measuring cylinder
and poured into a 250cm3
beaker.
● 5cm3
of aqueous starch was measured using a 10cm3
measuring cylinder and poured into
the beaker containing the aqueous potassium iodate.
● The aqueous potassium iodate and starch mixture was warmed over a Bunsen burner
until the temperature of the solution was about 35°C. The beaker was then removed from
above the Bunsen burner.
● 5cm3
of aqueous sodium metabisulfite was measured using a clean 10cm3
measuring
cylinder and poured into the beaker. At the same time a stop-clock was started.
● The mixture was stirred until a sudden colour change was seen.
● The stop-clock was stopped and the temperature of the mixture in the beaker was
measured using a thermometer.
● The beaker was rinsed with distilled water.

Q 03: (10:40)
Solid N and solution O were analysed. Solid N was zinc carbonate.
tests on solid N
(a) Dilute hydrochloric acid was added to a boiling tube containing solid N. Any gas produced was
tested.

Q 04: (15:09)
Many fizzy drinks contain phosphoric acid. Phosphoric acid reacts with sodium hydrogencarbonate
to make carbon dioxide gas.
Value Coke and Kola Koola are two fizzy drinks which contain phosphoric acid as the only acid.
Plan an investigation to find which of these two fizzy drinks contains the highest concentration of
phosphoric acid.
Include in your answer how your results will tell you which drink contains the highest concentration
of phosphoric acid.
You are provided with samples of both fizzy drinks, solid sodium hydrogencarbonate and common
laboratory apparatus.

[satyambehera]

these are genuinely very helpful, but im just commenting to give a quick suggestion. ive been watching your videos for a while now to check my past papers and doubts but i never knew about all the information in the description- which i found very helpful. there might be other students who dont know about it so maybe mention it at the start of the video incase anyone needs it. thanks a ton tho

[mohabmoemen]

i am actually really thankful, also you are clear and great enough to be a teacher💙

[MohsinAli-mjgb]

Aoa please also solve biology latest atp papers igcse please