1. 7F Bubbles, bangs and burning. 07/01/2015
Starter find 4 things wrong with picture B.
Look at the two pictures below. In picture B the scientist hasn’t been very careful. Write down the 4 errors he has made.
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2. 7F Bubbles, bangs and burning
I can make good observations.
I know ways to tell if a chemical reaction has taken place.
I know what a chemical reaction is.
I know how a chemical and physical reaction are different from each other.
I can give examples of a chemical and physical change.

3. How do we know a chemical reaction has taken place?
Chemistry
How do we know a chemical reaction has taken place?

4. How do we know a chemical reaction has taken place?
Chemistry
How do we know a chemical reaction has taken place?

5. How do we know a chemical reaction has taken place?
Chemistry
How do we know a chemical reaction has taken place?

6. we know a chemical reaction has taken place if we observe:
-Colour change
-gas or gases are produced
-change in mass
-light is given out
-change in temperature.

7. Chemical reactions
New materials are always made. Reactants turn into Products Key word dictionary

8. Chemical reaction means new stuff is made. Reactants → Products

9. Making good observations
Include –
Scientific words e.g. opaque, transparent, translucent
Colours
State of matter e.g. solid, liquid, gas
smell, feel, temperature (hot, cold or warm is fine)
Write in full sentences with capital letters and full stops.

10. I can tell the difference between chemical and physical reactions
Chemical reaction Physical change

11. 7F Bubbles, bangs and burning
I can make good observations.
I know ways to tell if a chemical reaction has taken place.
I know what a chemical reaction is.
I know how a chemical and physical reaction are different from each other.
I can give examples of a chemical and physical change.

12. Chemical v/s physical changes 11/01/2015 Starter
List 5 ways to tell a chemical reaction has taken place, for each way give an example.
Give 3 examples of a chemical reaction.
3. Describe this picture

13. No new substances are made. The change is easily reversed.
Physical Changes
No new substances are made. The change is easily reversed.

14. Chemical Changes new substances are made. Reactants-->Products
Changes are often permanent or irreversible
- Colour change
-gas or gases are produced
-change in mass
-light is given out
-change in temperature.

15. Key words: Particle, reaction, chemical, physical, reversible, reactant, product, state.
Level C - I have draw a labelled diagram to show the 5 ways to recognise a chemical reaction. - I have draw a labelled diagram to show a physical change. Level B - I have given an example for each type of chemical reaction ( give off light, give off gases, change the temperature, change in mass, change in colour). Level A – I have explained a chemical reaction in terms of reactants and products.

16. Change easily reversed
Physical
Chemical
Change easily reversed
Chemical
Light given off
Change in temperature
Gas(es) given off
Change in mass
An example is when you add marble chips to acid it weighs less at the end of the reaction than at the start.
Change in colour
Physical change

17. Key words Reversible-reaction can go backwards
Irreversible- reaction cannot go back wards.
Chemical change- particles react to make new particles.
Physical change- Same particles only arranged in a different way (e.g. solid liquid or gas)
Reactants-particles we start with in a reaction
Products-Particles we end up with after a reaction

18. Read page 79
Answer questions in book.

19. Toasting (burning) bread Frying an egg Boiling water
Chemical or physical change ?
Melting chocolate
Salt dissolving
Toasting (burning) bread
Frying an egg
Boiling water

20. Reactions that make hydrogen 13/01/2015
Starter
When an acid reacts with an alkali what is made ?
Acid + Alkali --> Salt + water
e.g. hydrocholric sodium > sodium water
acid hydroxide cholride

21. Reactions that make hydrogen
Describe the reaction of some metals + oxygen Describe the reactions of some metals and acids Describe the test for hydrogen gas Be able to write some word equations for the reactions of some metals and acids.

22. Reactions that make hydrogen
Some metals react with acids to make hydrogen gas.
Metals + Acid --> Salt + Hydrogen
(MASH)
E.g.
Iron + Hydrochloric acid --> Iron chloride + Hydrogen

23. E.g. hydrochloric acid + sodium sodium chloride + hydrogen
Extension
Salts name has two parts
The first part comes from the metal
The second part from the acid
E.g. hydrochloric acid + sodium sodium chloride + hydrogen
Complete the following
Sodium + nitric acid 
Zinc+ sulfuric acid
Magnesium + hydrochloric acid 
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24. Testing for hydrogen “POP”
A LIT Splint makes a squeaky pop when in contact with hydrogen gas.
“POP”
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25. Trap hydrogen for 30 seconds.
Testing for hydrogen
Trap hydrogen for 30 seconds.
Test gas
A LIT Splint makes a squeaky pop when in contact with hydrogen gas.
“POP”
2 cm3 of acid
1 piece of metal
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26. For each metal
Write an equation for the reaction.
Add the metal to 2cm3 of acid
Trap the gas
Test for hydrogen
Extension which metal/acid combination do you think was the most reactive and why?

27. Copy and complete the following.
Adding an ____ to some metals will cause a reaction to happen. This reaction will produce a ____ and ________ gas. Hydrogen gas is tested by putting a lit splint into the gas and a ______ ___ is heard.
Not all metals react. For example _________ will react but ______ doesn’t. Zinc reacts but only slowly.
acid
salt
hydrogen
squeaky
pop
magnesium
copper
magnesium, squeaky pop, salt, hydrogen, acid, copper
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28. Reactions to make carbon dioxide 11/01/2015
Starter.
1. The test for hydrogen gas is _____________
Copy and complete
2. Zinc + hydrochloric acid --> _______ + ______
3. _____+ nitric acid --> lead nitrate + hydrogen
4. Iron + _________--> iron sulfate + hydrogen

29. Reactions to make carbon dioxide 11/01/2015
To Independently research some different gases To make carbon dioxide in the laboratory To test for carbon dioxide in the laboratory.

30. Reactions to make carbon dioxide 11/01/2015
1. Read together page Answer questions on page Complete worksheet make and test for carbon dioxide.

31. Adding acid to carbonates
Carbonates are compounds containing carbon and oxygen. When an acid is added to a carbonate the carbonate starts to _______ and ________. A gas called ______ _______ is produced.
Carbonates used to be used as building materials but aren’t any more because acid rain would eventually ________ the building.
Gas
Limewater
Limewater turns milky/cloudy
Words – dissolve, fizz, carbon dioxide, oxygen
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32. Copy and complete the following
metal carbonate
Adding a _____ _________ to dilute acid will cause a reaction. This is because there is ______ due to a gas being produced and in some cases a ______ ______.
When _______ acid is added to ______ carbonate it fizzes and produces a gas and the solid changes from _____ to ____. The gas produced is tested with ________ which goes cloudy which is a positive test for ______ _______.
fizzing
colour change
sulphuric
copper
green
blue
limewater
Carbon
dioxide
Blue, carbon dioxide, metal carbonate, sulphuric, copper, limewater, green, colour change, fizzing
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33. Oxygen test 11/01/2015

34. Corrosion What has happened ? corrosion
Iron has reacted with oxygen and water to make a new substance iron oxide.

35. Burning things
When something is burned it reacts with oxygen. For example:
Magnesium + oxygen Magnesium oxide
Carbon + oxygen Carbon dioxide
Sulphur + oxygen Sulphur dioxide
Fire
The Fire Triangle
Oxygen
Fuel
Heat
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36. Fuels
Fuels are substances that can be used to release useful amounts of energy when they burn, e.g.
Wood
Gas
Oil
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37. Fuel + oxygen Carbon dioxide + water
Burning fuels
When fossil fuels (coal, oil and gas) are burned they produce water and carbon dioxide. We can use this apparatus to show this:
What is the general equation for combustion?
Fuel + oxygen Carbon dioxide + water
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38. Questions
Describe an experiment that produces carbon dioxide and how to test for it.
What is formed when Magnesium reacts with oxygen?
Write out the general equation for combustion. Identify the reactants and products in the equation.
Give 3 examples of fuels difficult to burn and 3 that are easy to burn. Which are most useful in a car?
Describe what is burning in a candle. How do you test this?
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39. Starter: Give an example in each box
Extension: explain the difference between a chemical and physical change.
Chemical
Light given off
Change in temperature
Gas(es) given off
Change in mass
Change in colour
Physical

40. Aims: To recognise if a reaction is physical or chemical (3)
To know how to recognise a chemical reaction (4)
To give examples of chemical reactions (4)
Level 5 challenge.
BLP : Capitalising Managing distractions

41. Which is a chemical reaction and which is a physical reaction ?
Melting wax
Burning paper

42. Which gas ? Relights a glowing splint ?
Makes a squeaky pop noise when it meets a flame ?
Puts out a flame ?

43. Guess the gas!

44. What is the odd one out ?

45. Quiz: What are the reactants needed to make a cake ?
Egg, flour, butter,
Acid and marble chips
An oven and a cook baking tray
Magnesium and a Bunsen

46. Quiz: What are the reactants needed to make hydrogen gas?
Egg, flour, butter,
Acid and marble chips
An oven and a cook baking tray
Magnesium and an acid

47. Quiz: What is the test for hydrogen gas ?
A glowing splint re-lights
A glowing splint make a squeaky pop noise
A light splint make a squeaky pop noise
The splint goes out

48. Quiz: What is the test for oxygen gas ?
A glowing splint re-lights
A glowing splint make a squeaky pop noise
A light splint make a squeaky pop noise
The splint goes out

49. Quiz: What is the test for carbon dioxide gas ?
A glowing splint re-lights
A glowing splint make a squeaky pop noise
A light splint make a squeaky pop noise
The splint goes out

50. Quiz: What is a use for carbon dioxide gas ?
Fire extinguishers
Lighting fires
As a fuel
The splint goes out

51. Quiz: What is a use for oxygen gas ?
Fire extinguishers
Lighting fires
As a fuel
The splint goes out

52. Quiz: What is a use for hydrogen gas ?
Fire extinguishers
Lighting fires
As a fuel
The splint goes out

53. Quiz: What gas is not in the air?
Nitrogen
oxygen
chlorine
Argon