Edexcel GCSE 360 Science - Chemistry C1a - For PRINTING

Topic 6 MAKING CHANGES (chmical reactions to make useful products)

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Across:

1 Sugars are an example (12)
6 Formula of the only common alkaline gas (3)
8 Vinegar is a solution of this chemical (8,4)
10 It means removing water from a compound (11)
12 To break a compound down using heat-high temperature (7,13)
13 The formula of sulphuric acid (5)
14 This gas can be neutralised with acids to make nitrogenous fertiliser salt compounds (7)
15 This scale tells you how acid or alkaline a solution is (2)
17 This gas turns limewater cloudy (white precipitate) (3)
18 These crystalline compounds do not dissolve in water (9,4)
19 Man-made as in flavours (10)
22 When an atom or compound gains oxygen (9)
23 The acid that is used to make phosphate salts (10)
26 The common 'old' name for the very strong alkali sodium hydroxide (7,4)
27 Compounds of this metal give fireworks a bright yellow colour (6)
30 To make a solution less concentrated (6)
31 The kind of compound made from reacting an acid and a base that dissolves in water (7,4)
33 The X hazard warning symbol (7)
35 The addition of water to a compound (9)
37 The formula for sodium hydroxide (4)
39 Spread on fields to make the soil more fertile (11)
40 The kind of salts made by neutralising hydrochloric acid (9)
41 The removal of oxygen from a compound (9)
44 A descriptor for substances that easily catch fire! (9)
45 A useful metal produced by reduction of CuO (6)

Down:

2 Formula of a gas essential for respiration! (2)
3 The word describes the chemical breaking down of a substance (13)
4 The formula of what is formed when magnesium burns (3)
5 It produces a spectacularly visual exothermic reaction! (8)
6 The reaction between an acid and an alkali/base to make a salt (14)
7 Symbol of a metal that is extracted from reducing a 'rusty' looking ore called haematite! (2)
9 Deadly! (5)
11 The burning of a substance (9)
15 General description for the formation of a substance that doesn't dissolve (11)
16 Lit splint - and the formula for a squeaky pop!
17 This compound makes fruit taste bitter - particularly citrus fruits! (6,4)
20 The formula of the compound formed by thermally decomposing copper carbonate (3)
21 It has a pH of less than 7 (4)
22 Add these to a molecule and you get oxidation (7)
24 Important salt-like compounds in fertilisers that add P to the soil (10)
25 Symbol of a material that when heated in air, gets oxidised to a black compound (2)
26 Mainly carbon, common fossil fuel (4)
28 Symbol of quite a poisonous metal which is why it is being replaced in plumbing with plastic (2)
29 Formed from an acid + base (4)
32 The salts formed by neutralising H2SO4 (9)
34 Formula of compound left after heating lead carbonate (3)
35 A potential danger, read the card! (6)
36 Not man-made! (7)
38 Formula of hydrochloric acid (3)
42 Formula of a black compound that dissolves in sulphuric acid to form a blue salt solution (3)
43 The sort of natural material from which you can extract a metal (3)
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