Investigating the effect of changing concentration on the rate of reaction

Here is my experiment write-up on the effect of changing concentration on the rate of reaction: I have tried to embed it but if it doesn't work, here is the link:
https://docs.google.com/document/pub?id=1YQu2SBVzgztkAJ-2xsccJAWCSeKpQdVithbqXvBaJYg

Rates of Reaction

As I did it on a word document, here is the link to the google document:

https://docs.google.com/open?id=1SYEykrVZIkXaHlSlC1YwKxlIE7jO_3Aj2b95Rv-YsN9ryLvSks41lgzRrvqc

Fermentation

Advantages of Fermentation:

• The raw materials used in the process are renewable resources
• Acids are obtained which can be used in the production of certain foods
• It allows the creation of ATP (energy) in the absence of oxygen
• It produces hydrogen 
• Fermentation plays a big role in acquiring the flavour of tea or wine

Disadvantages of Fermentation:

• The process takes a long time
• It produces alcohol that is not refined which creates a need for further processing
• a byproduct of fermentation (VOC) is highly toxic to humans

Advantages of INDUSTRIAL fermentation:

• It is very efficient and can produce a lot of alcohol in a shorter amount of time
• The product is more refined 
• The by-products of industrial fermentation can also be used in the production of consumer items because it breaks down and re-assembles biochemicals

Disadvantages of INDUSTRIAL fermentation:

• High levels of energy are needed in this type of fermentation
• Industrial fermentation uses resources that are non-renewable

Unit 3.8 Describe the addition reaction of alkenes with bromine, including decolourising

1. Write the word equation showing the reaction between Ethene and bromine water:

Ethene (g) + Bromine Water (aq) --> Dibromoethane

2. Draw the displayed formula of the reaction above: 

3. Explain the observations:

The reaction turns the water from red-brown to colourless

4.Why does this reaction not need a catalyst?

Because the unsaturated carbon carbon double bond is so reactive it facilitates the reaction on its own

5. What type of reaction is this called?

An addition reaction

6.Explain why this reaction is useful:
Because it can be used as a chemical test for Alkenes and the presence of the carbon carbon double bond

Unit 3.2 and 3.3 I can recall the general and displayed formulae for Alkanes

What is the general formula of Alkanes?
C_nH_2n+2

Unit 3.5 I can recall the reaction of methane and bromine to form bromomethane in the presence of UV light

·         Alkanes react with bromine in the presence of UV light

·         Explain why this condition is necessary because the UV light is required for the energy to break the bonds between carbon and hydrogen

3.       What is this type of reaction called A substitution reaction

4.       State and explain the observations The bromine and methane mixture goes from brown to a colour-less gas, because Bromine is brown whereas when reacted, the product (Bromomethane and Hydrogen Bromide) are colourless, therefore the resulting solution is colourless.

5.       Draw the displayed formula of the reaction between methane and bromine (upload a photo)

6.       Write out a balanced (with state symbols) the reaction between ethane and chlorine

C2H6 (g) + Cl2 (g) --> C2H5cl (g) + HCl (g)

7.       State and explain the observations in this chemical reaction

From a yellow gas to a colourless gas

3.4 I can recall the products of complete and incomplete combustion of alkenes

1.       Saturated hydrocarbons are called Alkanes

2.       Small chain Alkanes are used as fuels

3.       The reaction is called combustion

4.       The word equation for  this chemical reaction is :

fuel (Alkane) + Oxygen → Carbon Dioxide + Water + ENERGY (heat, light, sound)

5.       If there is insufficient oxygen then the word equation is:

fuel (Alkanes_) + Oxygen → Carbon Monoxide + Water + ENERGY (heat, light, sound)

6.       The problem with this reaction is that carbon monoxide is produced this gas is a threat to the human body (see objective 5.11)

7.       Where can you find incomplete combustion?

In car engines

8.       What is used to reduce the harmful products from incomplete combustion?

A catalytic converter

9.       During incomplete combustion a smoky flame is often seen, explain this observation

Extn: write a balanced equation (with state symbols) for the combustion of propane gas

The unburnt carbon from the incomplete combustion forms the black soot of the smoky flame

C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (l)