Chemistry: Reactions And Equations

Question 1

Neutralizing reactions

Provide 3 examples of neutralization with hydroxide

Answer 1

HCl+ NaOH= H2O+NaCl

H2SO4+Ba(OH)2=2H2O+BaSO4

H3PO4+3KOH=3H2O+K3PO4

Question 2

Neutralization reactions

Can carbonate also neutralize?

Answer 2

Yes Acids can also be neutralized

Question 3

Neutralization reaction

How many steps is in neutralization with carbonate?

Answer 3

This is a two step process

Question 4

Neutralization reaction

What happens in the first step? Provide an example.

Answer 4

In the first step a double displacement reaction occurs between the acid and the carbonate to form carbonic acid and a salt.

Acid+carbonate=carbonic acid+ salt

Question 5

Combustion reactions

When does an incomplete combustion occur?

Answer 5

This occurs when there is not enough oxygen available for complete combustion

Question 6

Combustion reactions

Are hydrocarbons part of complete or incomplete combustion?

Answer 6

Incomplete

Question 7

Combustion reaction

What is one side effect of hydrocarbon fuels?

Answer 7

The combustion of hydrocarbon fuels contributes tones of carbon dioxide to the atmosphere, which is suspected of contributing to climate change and is known to acidity the oceans

Question 8

Combustion reactions

Write the word, skeleton and chemical equation of the combustion of a hydrocarbon of butane used in butone lighter?

Answer 8

Butane+oxygen=carbon dioxide+water

Skeleton: C4H10O2=Co2+H2O

Chemical: 2C4H10+13O2=8CO2+10H2O

Question 9

Combustion reactions

How can the combustion of a hydrocarbon generally be represented as?

Answer 9

Hydrocarbon+oxygen=carbon dioxide+water vapour.

Question 10

Combustion reactions

Are hydrocarbons used today?

Answer 10

They are the most important fuels used today.

Question 11

Combustion reactions

What are the hydrocarbon fuels?

Answer 11

Are compounds that are made only from the elements hydrogen and carbon and are found in oils, coal and natural gas.

Question 12

Combustion reactions

What is the general word equation for combustions?

Answer 12

Fuel+oxygen=oxides of the fuel

Question 13

Combustion reactions

What is a combustion reaction?

Answer 13

Combustion is a very rapid reaction of a substance known as the fuel with oxygen

Question 14

Combustion reactions

How are chemical reactions classified?

Answer 14

Bases on different categories based on patterns in the reactants and products

Question 15

Chemical equations

Write a word and chemical equations representing the reaction between sodium and chlorine gas to produce sodium chloride

Answer 15

Sodium+chlorine gas=sodium chloride

2Na+Cl2=2NaCl

Question 16

Chemical equations

Is a chemical equations and a skeleton equation the same thing?

Answer 16

Yes a chemical equation is just a balanced skeleton equations

Question 17

Chemical equations

Can you balance an equation by changing the chemical formula?

Answer 17

NEVER EVER

Question 18

Chemical equations

How do you balance a chemical equation?

Answer 18

To balance an equation we add a whole number coefficient in from of the chemical formula.

Question 19

Chemical equations

Do the number of atoms of each element need to be the same on both sides

Answer 19

Yes both sides must be equal for example

2H2+O2=2H2O

Question 20

Chemical equations

Why is the law of conservation of mass relevant?

Answer 20

This is because in a chemical reaction, atoms can be neither created or destroyed.

Question 21

Chemical equations

What is the law of conservation of mass?

Answer 21

Is a rule that states in any chemical reaction, the mass of the products must be equal to the mass of the reactants

Question 22

Chemical equations

Give 2 examples of skeleton equations

Answer 22

H2+O2=H2O

Na+Cl2=NaCl

Question 23

Chemical equations

What is a skeleton equation

Answer 23

A skeleton equation is an equation in which the name of the compounds have been replaced with chemical symbols

Question 24

Combustion reactions

What is carbon monoxide?

Answer 24

Is a poisonous Colorless odourless gas

Question 25

Combustion reactions What is responsible for the black soot seen from fires?

Answer 25

The carbon is responsible

Question 26

Combustion reactions What is the chemical and word equations for the incomplete combustion of methane?

Answer 26

Methane+oxygen=carbon dioxide+carbon monoxide+water 4CH4+6O2=2Co+C+8H2O Or 5CH4+7O2=CO2+2CO+2C+10H2O

Question 27

Single and double displacement reactions What happens in a single displacement?

Answer 27

An element to reacts with an ionic compound

Question 28

Single displacement What happens during this reaction?

Answer 28

The well element becomes part of the compound while one of the elements in the ionic compound becomes an element by itself

Question 29

Double displacement Will the reactants always be compounds?

Answer 29

Yes! Will always be ionic compounds

Question 30

Double displacement What form do these reactants usually form?

Answer 30

A solid

Question 31

Double displacement Provide 2 examples of double displacement reaction

Answer 31

Mg(OH)2+2AgNO3=Mg(NO3)2+AgOH

Question 32

Synthesis When does a synthesis reaction occur?

Answer 32

Whenever two element or simple compounds combine to form a more complete products

Question 33

Synthesis What is the general equation?

Answer 33

A+B=C

Question 34

Synthesis Provide 2 examples of synthesis

Answer 34

2H2+O2=2H2O 2Na+Cl2=2NaCl 2Mg+O2=2MgO

Question 35

Decomposition What does a decomposition reaction involve?

Answer 35

The splitting of a single reactant into two or more substances

Question 36

Decomposition What is the general equation?

Answer 36

A=B+C

Question 37

Decomposition Provide 2 examples of decomposition.

Answer 37

2H2O=2H2+O2 | 2Nl3=N2+3I2

Question 38

Decomposition does decomposition require heat or electricity?

Answer 38

Usually but not always

Question 39

Combustion reaction What four products does incomplete combustion produce?

Answer 39

Carbon dioxide carbon monoxide carbon water

Question 40

Chemical equations What is a word equation?

Answer 40

It i an equation represented by the names of the chemicals

Question 41

Chemical equations What symbol do we use to separate the products?

Answer 41

Anarrow known as 'produces' 'yeilds' or 'names'

Question 42

Chemical equations What is the left side of the equation called?

Answer 42

The products or newly produced materials.

Question 43

Chemical equations What are the left side of the equation called?

Answer 43

reactants, also known as the starting materials

Question 44

Chemical equations How can chemical reactants be represented?

Answer 44

Using: word equations skeleton equations chemical equations

Question 45

Chemical equations Provide 2 examples of word equations for: hydrogen+oxygen=? Sodium+Chlorine=?

Answer 45

Hydrogen gas+Oxygen gas=water | Sodium+Chlorine gas=sodium chloride

Question 46

Neutralizing reactions What 2 way effectively neutralize acid?

Answer 46

use hydroxide | use a carbonate

Question 47

Neutralizing reactions What happens during a neutralization reactions?

Answer 47

During a neutralization reaction an acid reacts with a base to produce a solution with a pH closer to 7 than its reactants

Question 48

Neutralization reactions What is a neutralization reaction?

Answer 48

Neutralization reactions are a special case of double displacement reactions

Question 49

Neutralization reaction Whats the general pattern for neutralization with hydroxide?

Answer 49

Acid+base=water+ionic compound

Question 50

Neutralization reactions What happens in a neutralization with hydroxide reaction?

Answer 50

In this type of reaction the hydrogen ion is from the acid combined with hydroxide to produce liquid water

Question 51

Neutralization reactions What happens with the remaining components of the acid and base in a neutralization with hydroxide?

Answer 51

The remaining components of the acid and base combine to form an ionic compound commonly referred to as salt.

Question 52

Neutralization with carbonate Is the carbonic acids that is formed stable?

Answer 52

No its unstable, in solutions at room pressure and rapidly undergo decomposition carbon dioxide and water

Question 53

Neutralization reaction What is the general or overall reaction in neutralization with carbonate?

Answer 53

Acid+carbonate=water+carbon dioxide+salt

Question 54

Neutralization with carbonate Provide 2 examples of neutralization with carbonate

Answer 54

2HCl+NaCo3=H2O+Co2+2NaCl | H2So4+BaCo3=H2O+Co2+BaSo4