Mr Gribbin`s year 10 revision page by Mr Gribbin

Combustion of Flour

rgribbin — 2014-03-11 22:11:57 UTC

Dissolving animation link

rgribbin — 2014-03-13 14:05:08 UTC

Things to take note of:

1. The words are not important It is as it is at too high of a level

2. The water molecules come in and drag out the sugar molecules and spread hem throughout the solution

The revision page

rgribbin — 2014-03-29 20:38:07 UTC

This revision page contains everything that i have covered in the last few weeks. All of the content may show up in your LO and your KS3 test

rgribbin — 2014-03-29 20:40:35 UTC

Reactions can have physical and chemical changes below i have split the types into the two types

Physical Reactions!

rgribbin — 2014-03-29 20:43:22 UTC

Physical Reactions

rgribbin — 2014-03-29 20:46:27 UTC

Physical reactions can be described as those that can be easily reversed. Think of changes of state.

They are easily reversed by heating or cooling. Other examples of physical reactions and ways to reverse them are shown below

Dissolving

rgribbin — 2014-03-29 20:50:08 UTC

Reversed by evaporation.

When you evaporate the water the solid will be left behind

When liquids mix they can be easily separated so it is a physical change

rgribbin — 2014-03-29 20:56:21 UTC

Depending on how the liquids act they can be Separated in three different ways

1. Separating funnel

2. Simple Distillation

3. Chromatography

Seperating Funnel

rgribbin — 2014-03-29 21:08:17 UTC

Notes

1. Oil and water will not mix

2. Open tap to pour the bottom liquid into a beaker

3. close tap when all the water is gone

4. Pour the oil into another beaker

5. The two liquids are not perfectly seperated

What if it does not dissolve

rgribbin — 2014-03-29 21:18:35 UTC

If a substance does not dissolve then we separate by using filtration

Simple Distillation

rgribbin — 2014-03-29 21:23:00 UTC

Use simple distillatio when 2 liquids perfectly mix

Chromatogarhy

rgribbin — 2014-03-29 21:27:20 UTC

Splits a mixture into its key components

for example colours into the colours they are made out of

or DNA splits into its key parts

ignore the terrible music in the video

Chemical Reactions

rgribbin — 2014-03-29 21:36:09 UTC

Signs of a chemical reaction

rgribbin — 2014-03-29 21:37:27 UTC

Change in colour

Change in mass

new solid formed

Heat loss or gain

Gas give off

Chemical Reactions

rgribbin — 2014-03-29 21:43:00 UTC

Chemical reactions are those you cant easily reverse. All types of cooking are the most common types of chemical reactions but there is also many other types of chemical reactions which are listed below

Exothermic and Endothermic reactions

rgribbin — 2014-03-29 21:50:28 UTC

These reactions are easy to define

Exo means to give out in heat

Endo means to take in heat

rgribbin — 2014-03-29 21:54:57 UTC

Here are two easy examples of exo and endothermic reactions

the first is burning of magnesium which is exo

The second is ammonim chloride and water which is endo

My Powerpoints

rgribbin — 2014-03-29 22:04:45 UTC

My power points are stored at padlet.com/wall/mrgribbinpowerpoint

Combsution

rgribbin — 2014-03-29 22:15:59 UTC

The most common form of exothermic reaction

Combustion only happens under certain circumstances

If one of the three factors in the triangle below are not present then combustion does not happen

Thermal Decomostion

rgribbin — 2014-03-29 22:26:59 UTC

This is where a substance is broken down by heat to form to new substances. You can tell a chemical reaction is endothermic if the equation has one reactant and more than one product.

rgribbin — 2014-03-29 22:39:26 UTC

Oxidation and Reduction

rgribbin — 2014-03-29 22:46:03 UTC

Oxidation and Reduction reactions are the opposite of each other

Oxidation reactions are when a chemical combines with oxygen to form an oxide

Reduction reactions are when an oxide has the oxygen taken away from it.

oxidation of magnesium

rgribbin — 2014-03-29 22:52:38 UTC

Important experiment

The weighing is not important as that is a GCSE experiment. You just need to know what you see and how to set up the experiemnt.

Neutralisation

rgribbin — 2014-03-29 22:57:49 UTC

Neutralisation is where you add a acid and a alkali to make a salt.

General equation = ACID + ALKALI = SALT + WATER

When naming the salts use the powerpoint above

Displacement

rgribbin — 2014-04-01 17:16:50 UTC

Displacement is where one element pushes another element out of a compound. The displacement reaction only takes place if the element is igher in the reactivity series.

You have to learn the reactivity series. Below is the video i have showed in class but be warned it does not cover all the elements

reactivity rhyme

rgribbin — 2014-04-01 17:25:24 UTC