Compounds, Formulae And Equations 2.1.2 Flashcards

1
Q

How can the ionic charge of an element be predicted?

A

From the position of an element in the periodic table

Elements in specific groups of the periodic table typically exhibit characteristic ionic charges.

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2
Q

What is the formula for the nitrate ion?

A

NO3–

Nitrate is a common polyatomic ion used in various chemical reactions.

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3
Q

What is the formula for the carbonate ion?

A

CO32–

Carbonate is widely found in natural substances and is important in biogeochemical cycles.

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4
Q

What is the formula for the sulfate ion?

A

SO42–

Sulfate plays a significant role in environmental chemistry and biological processes.

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5
Q

What is the formula for the hydroxide ion?

A

OH–

Hydroxide is commonly encountered in bases and is crucial in acid-base chemistry.

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6
Q

What is the formula for the ammonium ion?

A

NH4+

Ammonium is a key ion in nitrogen metabolism and fertilizers.

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7
Q

What is the formula for the zinc ion?

A

Zn2+

Zinc ions are essential for many biological enzymes and processes.

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8
Q

What is the formula for the silver ion?

A

Ag+

Silver ions are known for their antimicrobial properties and are used in various applications.

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9
Q

What is required for constructing balanced chemical equations?

A

State symbols, an equal ammount of atom on both sides and correct formukar

Balanced equations are essential for understanding the conservation of mass in reactions.

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10
Q

Fill in the blank: The formula for the sulfate ion is _______.

A

SO42–

This ion is often encountered in various chemical reactions and compounds.

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11
Q

True or False: The ionic charge can be determined solely by the atomic mass of an element.

A

False

Ionic charge is primarily determined by the position of an element in the periodic table, not its atomic mass.

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12
Q

Construct a balanced equation between aluminium and oxygen to form aluminium oxide. Include state symbols.

A
  1. Work out the formulae of aluminium oxide. aluminium form 3+ ions and oxygen form 2- ions. Therefore, aluminium oxide is Al2O3.
  2. Balance the equation by placing numbers in front of the formulae
  3. 4Al (s) + 3O2 (g) —> 2Al2O3 (s)
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13
Q

Write formulae for potassium oxide, ammonium carbonate, and Iron (II) nitrate

A

Potassium oxide = K2O
Ammonium carbonate = (NH4)2CO3
Iron (II) nitrate = Fe(NO3)2

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14
Q

Name the following compounds: (NH4)3PO4, Fe2(SO4)3, AlN

A

Ammonium phosphate, Iron (iii) sulphate, Aluminium nitride

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15
Q

Balance the following equation:
Zn (s) + HNO3 (aq) —> Zn(NO3)2 (aq) + NO (g) + H2O (l)

A

3Zn (s) + 8HNO3 (aq) —> 3Zn(NO3)2 (aq) + 2NO (g) + 4H2O (l)

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16
Q

Write equation for: magnesium and solid phosphorus to form solid magnesium phosphide

A

6Mg (s) + P4 (s) —> 2Mg3P2 (s)

17
Q

Write equation for iron reacting with aqueous copper nitrate to form copper and aqueous iron (iii) nitrate

A

2Fe + 3Cu(NO3)2 —> 3Cu + 2Fe(NO3)3

18
Q

Write equation for iron reacting with aqueous copper nitrate to form copper and aqueous iron (iii) nitrate

A

2Fe + 3Cu(NO3)2 —> 3Cu + 2Fe(NO3)3

19
Q

What elements are diatomic?

A

Hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I)

20
Q

What is the formula of small molecules phosphorus and sulphur

A

P4 and S8 (however usually written as S in equation)