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Flashcards in Section 2 Deck (33):
1

sodium and water

-melts
-fizzes
-moves around surface
-may ignite

2

sodium and water equation

2Na + 2H2O --> 2NaOH + H2

3

lithium and water

-floats
-meltz
-fizzes

4

potassium and water

-burns with a lilac flame
-floats
-melts

5

what happens to the elements in group 1 as their atomic number increases?

their reactivity increases

6

chlorine state at room temp

gas

7

chlorine colour

green

8

bromine state at room temp

liquid

9

bromine colour

red-brown

10

iodine state at room temp

solid

11

iodine colour

dark grey

12

what is dissociation?

when a molecule splits up into ions

13

what colour is bromine in the displacement reaction?

orange

14

what colour is iodine in the displacement reaction?

brown

15

what would you observe when magnesium is added to a dilute acid?

-vigorous reaction
-lots of bubbles

16

aluminium and acid

-doesnt react much with cold acid
-reacts vigorously with warm acid
-produces lots of bubbles

17

zinc/iron and acid

-slow reaction with cold acid
-strong reaction when you heat them up

18

rust equation

iron + oxygen +water --> hydrated iron (3) oxide

19

two ways to prevent rusting:

-painting/oiling
-galvanising

20

oxygen in air

21%

21

argon in air

0.9%

22

nitrogen in air

78%

23

carbon dioxide in air

0.04%

24

how to measure the % of oxygen in the air (with iron or phosphorus)

-soak iron wool in ACETIC acid
-invert test tube in water
-measure the volume of water at the start and end of the experiment

25

what is used to make oxygen in the lab?

hydrogen peroxide

26

what catalyst is used to make oxygen in the lab?

manganese(iv) oxide

27

magnesium burning in air

-bright white flame
-white magnesium oxide

28

carbon burning in air

-yellowy/orange flame
-carbon dioxide gas is produced

29

sulfur burning in air

-pale blue flame
-sulfur dioxide is produced

30

what is used to make carbon dioxide in the lab?

-calcium carbonate
-dilute HCl

31

equation for the production of carbon dioxide

2HCl + CaCO3 --> CaCl2 + H20 + CO2

32

thermal decomposition of copper carbonate:

CuCO3 --> CuO + CO2

33

uses for Carbon dioxide

-fire extinguishers
-fizzy drinks