What pH would you expect a strong acid to be? What ions ... · PDF file16/11/2017 What pH would you expect a strong acid to be? What ions make a substance acidic or alkaline? How can

16/11/2017What pH would
you expect a strong acid to be?
What ions make a substance acidic
or alkaline?
How can we identify the pH of
a substance?

16/11/2017
Grade 4 Grade 6 Grade 8
Identify neutralisation
reactions
Recall the ions which make a
substance acidic or alkaline
Write word equations for reactions of acids with
alkalis, metals and carbonates
Write balanced symbol equationsfor reactions of
acids with alkalis, metals and carbonates
To understand reactions of acids

Endeavour3:
What causes the liquids to be different to solids? The gases to liquids?

http://www.bbc.co.uk/learningzone/clips/particle-models-of-solids-liquids-and-gases/1857.html
http://www.bbc.co.uk/learningzone/clips/particle-models-of-solids-liquids-and-gases/1857.html

The difference between solids, liquids and gases can be explained by the particle model.
All substances are made up of particles.
The particles are attracted to each other. Some particles are bonded strongly to each other and others weakly.
The particles move around. They are described as having kinetic energy.
The kinetic energy of the particles increases with temperature.
The particle model

6 of 32 Boardworks Ltd 2007
Separating mixtures

Filtering

Evaporation

Distillation

empirical formula balanced formula equations
16/11/2017 Ambition Endeavour Success
Chromatography experiment

empirical formula balanced formula equations
16/11/2017 Ambition Endeavour Success
Which ink?

Word equations
A word equation is used as a quick, shorthand way of writing a chemical reaction.
There are always three parts to a word equation:
What is the word equation for hydrogen reacting with oxygen to form water?
hydrogen oxygen water+
The names of the reactants
An arrow
The names of the products.

Reactant or product?
In this chemical reaction, which substances are the reactants and which substances are the products?
magnesium magnesiumoxide copper+ copperoxide +
product
reactant
reactant
product
magnesium oxide
magnesium
copper oxide
copper
Substance Reactant or product?

+
acid alkali salt + water
+ acid alkali salt + water
What is neutralization?

When a metal oxide reacts with an acid, the products are a salt and water.
metaloxide acid salt water+ +
A metal oxide is a type of chemical called a base.
Bases are chemicals that react with an acid to produce a salt and water.
A base that is soluble in water is called an alkali.
Using the products as a clue, what is the reaction between a base (such as a metal oxide) and an acid called?Neutralization.
Reaction of metal oxides with acids

Reaction of metal oxides activity

When a metal carbonate reacts with an acid, the products are a salt, carbon dioxide and water.
The salt produced depends on the metal carbonate and type of acid involved in the reaction:
When a metal carbonate reacts with hydrochloric acid, the salt produced is a metal chloride.
When a metal carbonate reacts with sulfuric acid, the salt produced is a metal sulfate.
When a metal carbonate reacts with nitric acid, the salt produced is a metal nitrate.
metalcarbonate acid salt
carbondioxide water+ + +
Reaction of metal carbonates

Reaction of metal carbonates activity

What is the order of reactivity?

The reactivity series can be used to make predictions about the reactions of metals.
Predictions can be made about simple reactions of metals with oxygen, water and acids.
Predictions can also be made about more complex reactions where one metal is competing with another.
potassiumsodiumcalciummagnesiumaluminiumzincironleadcoppersilvergold
Using the reactivity series
incr
easi
ng re
activ
ity

Use the reactivity series to predict if a reaction will take place and how intense the reaction will be.
acidgold
Metal Reacts with
calcium
sodium oxygen
oxygen
oxygensilver
Prediction
zinc
water
potassiumsodiumcalciummagnesiumaluminiumzincironleadcoppersilvergold
no reaction
fizzing
burns vigorously
very slow reaction
burns moderately
Predicting simple reactions

Displacement reactions activity

Thursday, 16 November 2017
Balancing equations:
H2 + O2 H2OElement Number before
reactionNumber after reaction

Symbol equations balanced or not?

Exam question
WWW
EBI
Improve
How many marks now?
Extension:Can you think of another use for neutralisation?

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MCQ it
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Slide Number 1Slide Number 2Slide Number 3Slide Number 4The particle modelSeparating mixturesFilteringEvaporationDistillationChromatography experimentWhich ink?Word equationsReactant or product?What is neutralization?Slide Number 15Reaction of metal oxides with acidsReaction of metal oxides activityReaction of metal carbonatesReaction of metal carbonates activityWhat is the order of reactivity?Using the reactivity seriesPredicting simple reactionsDisplacement reactions activitySlide Number 24Symbol equations balanced or not?Slide Number 26Slide Number 27Slide Number 28Slide Number 29

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What pH would you expect a strong acid to be? What ions ... · PDF file16/11/2017 What pH would you expect a strong acid to be? What ions make a substance acidic or alkaline? How can