Unit 1 - Hydrogen, Oxygen & The Atmosphere

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

Card preview (24)

Front (Question)

Metal + water –>

Back (Answer)

Metal + water –> metal hydroxide + hydrogen This only works for metals soluble in water (Potassium, Sodium, Calcium) Eg. Na + H2O –> NaOH + 1/2 H2

Front (Question)

Simple test for hydrogen gas

Back (Answer)

Put lit splint into gas. If test is positive, a pooping sound will me made.

Front (Question)

Physical test to show if water is pure

Back (Answer)

Boil water. If water boils at exactly 100 degrees then it is pure. Impure water takes longer to boil

Front (Question)

Test for oxygen

Back (Answer)

Put glowing splint in gas. If test is positive, splint will relight

Front (Question)

Metal + acid –>

Back (Answer)

Metal + acid –> salt + hydrogen This only works if the metal is more reactive than hydrogen and of the salt is soluble

Front (Question)

What do all acids contain

Back (Answer)

Hydrogen

Front (Question)

How do you identify a salt ?

Back (Answer)

Salts can be easily identified, since they usually consist of positive ions from a metal with negative ions from a non metal Eg sodium chloride, zinc sulfate etc

Front (Question)

Metal + steam –>

Back (Answer)

metal + steam –> metal oxide + hydrogen Eg zinc + steam –> zinc oxide + hydrogen

Front (Question)

What gases can be found in air ?

Back (Answer)

Nitrogen 78% Oxygen 21% Argon 0.96% Carbon dioxide 0.03% Neon 0.0006%

#10

Front (Question)

Hydrochloric acid

Back (Answer)

HCl

#11

Front (Question)

Sulphuric acid

Back (Answer)

H2SO4

#12

Front (Question)

Hydrochloride acid + magnesium –>

Back (Answer)

Magnesium chloride + hydrogen

#13

Front (Question)

Sulphuric acid + magnesium –>

Back (Answer)

Magnesium sulphate + hydrogen

#14

Front (Question)

Hydrochloric acid + aluminium –>

Back (Answer)

Aluminium chloride + hydrogen

#15

Front (Question)

Sulphuric acid + zinc –>

Back (Answer)

Zinc sulphate + hydrogen

#16

Front (Question)

Describe the combustion of hydrogen

Back (Answer)

The combustion of hydrogen is its reaction with oxygen. Water is created as well as lots of energy

#17

Front (Question)

Describe the chemical test for water

Back (Answer)

Add anhydrous copper(II) sulphate (white powder). If water if present, the white powder will change to a blue colour

#18

Front (Question)

Describe the laboratory preparation of oxygen from hydrogen peroxide

Back (Answer)

When dilute hydrogen peroxide (H2O2) is decomposed, either by heating it or by the use of a catalyst such as manganese(IV) oxide (MnO2), oxygen is evolved and water is left behind

#19

Front (Question)

Equation to show the decomposition of hydrogen peroxide

Back (Answer)

Hydrogen peroxide –> water + oxygen 2H2O2 (aq) –> 2H2O (l) + O2 (g)

#20

Front (Question)

Describe a soluble basic (alkaline) oxide

Back (Answer)

These oxides dissolve in water to form hydroxides. They react with acids to form salts but do not react with other alkalis. Group 1 and some group 2 oxides are of this type

#21

Front (Question)

Describe insoluble basic oxides

Back (Answer)

The oxides do not dissolve in water. They react with acids to form salts but do not react with alkalis. Some group 2 oxides and transition metal oxides are of this type.

#22

Front (Question)

Describe amphoteric oxides

Back (Answer)

These oxides do not dissolve in water. They react with acids to form salts and react with alkalis to form salts with strange names. Metals near to the metal/non-metal border in the periodic table are of this type (eg zinc or aluminium)

#23

Front (Question)

Describe acidic oxides

Back (Answer)

These oxides usually dissolve in water to form acids. They react with alkalis to form salts but do not react with other acids. Non-metal oxides are usually of this type.

#24

Front (Question)

When do salts form

Back (Answer)

Salts form when a metal replaces the hydrogen in an acid