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C15 - Using our Resources

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

Card preview (24)

#1
Front (Question)

word equation rusting

Back (Answer)

iron + oxygen + water → hydrated iron oxide

#2
Front (Question)

define corrosion

Back (Answer)

destruction of materials by chemical reactions with substances in the environment

#3
Front (Question)

describe: showing rusting RP

Back (Answer)

In test tube, iron nail, stopper: 1. water + oxygen = rust 2. boiled water + oil = no rust 3. drying agent = no rust

#4
Front (Question)

list 3 barrier methods to prevent iron rusting

Back (Answer)

• painting • oil • electrolysis - cover with thin layer of other metal

#5
Front (Question)

define: sacrifical protection method

Back (Answer)

using another more reactive metal to prevent iron from rusting

#6
Front (Question)

name and describe: a sacrifical protection method

Back (Answer)

galvanising - coating iron with a layer of zinc

#7
Front (Question)

name: elements in alloys: 1. bronze 2. brass 3. gold (jewelry) 4. steel 5. stainless steel

Back (Answer)

• copper, tin • copper, zinc • gold, silver, copper, zinc • iron, carbon • iron, chromium, nickel

#8
Front (Question)

name: 2 properties of: 1. low carbon steel 2. high carbon steel 3. stainless steel

Back (Answer)

• soft + malleable • strong + brittle • hard + corrosion resistant

#9
Front (Question)

name: 1 use of: 1. low carbon steel 2. high carbon steel 3. stainless steel

Back (Answer)

• car body • drill bits • cutlery

#10
Front (Question)

word equation: Haber Process

Back (Answer)

nitrogen + hydrogen ⇌ ammonia

#11
Front (Question)

name: sources of hydrogen and nitrogen in the Haber Process

Back (Answer)

N2 - air H2 - methane (CH4)

#12
Front (Question)

describe: Haber Process

Back (Answer)

• H2 and N2 into reactor • conditions: 200 atmospheres, 450°C, iron catalyst • passed into a cooling tank to make liquid ammonia • unreacted H2 and N2 are recycled

#13
Front (Question)

chemical formula: ammonia

Back (Answer)

NH3

#14
Front (Question)

define: acronym NPK

Back (Answer)

Nitrogen, Phosphorus, Potassium

#15
Front (Question)

How do plants use each substance in NPK fertilisers?

Back (Answer)

N: amino acids - proteins - growth P: phosphates - DNA K: enzymes - respiration + photosynthesis

#16
Front (Question)

name: the acid that ammonia can be converted into

Back (Answer)

nitric acid

#17
Front (Question)

list: 3 word equations for different ammonium salts

Back (Answer)

• ammonia + nitric acid → ammonium nitrate • ammonia + phosphoric acid → ammonium phosphate • ammonia + sulfuric acid → ammonium sulfate

#18
Front (Question)

formula: ammonium ion

Back (Answer)

NH4+

#19
Front (Question)

name: 2 fertilisers from raw materials

Back (Answer)

• potassium chloride • potassium sulfate

#20
Front (Question)

name: products of phosphate rock treated with nitric acid

Back (Answer)

calcium nitrate and phosphoric acid

#21
Front (Question)

name: products of phosphate rock treated with phosphoric acid

Back (Answer)

single superphosphate (calcium phosphate and calcium sulfate)

#22
Front (Question)

name: products of phosphate rock treated with sulfuric acid

Back (Answer)

triple superphosphate (calcium phosphate)

#23
Front (Question)

define: thermosoftening polymers

Back (Answer)

melt when heated

#24
Front (Question)

define: thermosetting polymers

Back (Answer)

do not melt when heated - they char and burn