Chemistry > MARK SCHEMES > Chem Mark 2020 2H1– GCSE COMBINED SCIENCE TRILOGY – 8464C2H (All)

Chem Mark 2020 2H1– GCSE COMBINED SCIENCE TRILOGY – 8464C2H

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C3H8 + 5 O2 → 3 CO2 + 4 H2O allow multiples 1 AO2 5.1.1.1 5.7.1.3 01.2 (bubble gas through) lime water turns milky / cloudy / white or white precipitate forms MP2 is dependent upon correct ... response in MP1 allow (bubble gas through) calcium hydroxide (solution) 1 1 AO1.2 5.8.2.3 01.3 C3H6 1 AO2 5.1.1.1 5.7.1.4 01.4 burning / lit splint burns with a (squeaky) pop sound MP2 is dependent upon correct response in MP1 allow flame do not accept glowing splint allow pops 1 1 AO1 5.8.2.1 01.5 bromine (water) (colour change) orange (to) colourless do not accept bromide allow 1 mark for colourless (to) orange ignore clear [Show More]

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