Breve presentación sobre las reacciones de neutralización. Dirigida a alumnos de 6º de primaria (KS3, year 7)

1. Title: Neutralisation
What do you think happens when an
acid and an alkali are mixed?
?
Write an idea in
your book!
Stretch: People put
vinegar on wasp stings.
Looking at our title and
what we were learning
last lesson, suggest
why!?

2. The chemical reaction between an acid and an alkali is
called neutralisation.
Acid Alkali A salt Water
pH 7You need to
remember this!!
I’ll be testing you!!

3. LO: To describe a neutralisation reaction
Level 4
To describe how to make a neutral solution
Level 5
To describe a neutralisation reaction using a
simple word equation
Level 6
To explain a SPECIFIC neutralisation reaction
using a word equation

4. What is neutralisation?
What
number is
neutral on
the pH scale?
What colour is a
neutral solution
with universal
indicator?
How do you
achieve a
neutral
solution?
Can you give an
example of where
neutralisation is used
in everyday life.
Do you remember
the word
equation?
Make a mega fact mind-map on neutral
solutions 7 Minutes
Stretch: Make these
words into a
neutralisation
equation:
Water
Sodium Hydroxide
Sodium chloride
Hydrochloric acid
+, +, 

5. What is neutralisation?
What number is
neutral on the pH
scale?
pH7
What colour is a
neutral solution
with universal
indicator?
GREEN
How do you achieve a
neutral solution?
By adding an acid and
an alkali together
Give an example of where
neutralisation is used in everyday
life.
-Fertilizer
-Bee and wasp stings
-Antacid tablets
Do you already
know a word
equation?
Acid + Alkali 
Salt + Water
Stretch:
Hydrochloric acid +
Sodium hydroxide 
Sodium Chloride + water

6. PUT GOGGLES ON
1. Add a couple of drops of
universal indicator to the NaOH
(Alkali) in the test tube
2. Put 10cm3 of hydrochloric acid into
the measuring cylinder.
3. Use the pipette and carefully DROP
BY DROP add the acid to the
alkali.
4. Swirl the test tube as you do this
5. STOP when the solution goes green
6. Record how much acid it took to
neutralise the alkali in your table.
7. Do this again TWO more times to
get an average.
Equipment
Person 1
1. 10cm3
measuring cylinder
2. Test tube rack
with test tubes of
alkali
Person 2
3. Pipette
4. Small beaker of
HCl
5. Goggles
I am looking for THE BEST
neutral solution!!
WHO CAN GET THE BEST
GREEN?

7. Level 6 Hard Stuff!!
How do we know how to write word equations
for SPECIFIC neutralisations?
Hydrochloric Acid + Sodium Hydroxide 
Sodium Chloride + Water
The Acid!
The acid makes the
last name of the salt!
The Alkali
The first part of the salt’s name is the
same as the first part of the ALKALIS
name.
The salt!
First part is the same as the
alkali’s
Second part comes from the
acid!

8. NEWS FLASH!!
A LORRY CARRYING CONCENTRATED ACID HAS
OVERTURNED AND BLOCKED THE ROAD- ACID
IS EVERYWHERE!
Stretch: Hard word equations!
Come and get a sheet and have a go for the scientific edition of the newspaper!
Write a news report for The Metro on this story!!!
You must include:
Level 4
- How could the fire service neutralise the acid
- How could the Fire Service use a way to show the
strength of the acid?
Level 5-
Explain how neutralising the acid works with an equation!
EXTRAS:
Why was the acid spill so dangerous?
What hazard symbol might be on the lorry?

9. HAZARD SYMBOLS
CORROSIVE FLAMMABLE EXPLOSIVE TOXIC
CAUTION IRRITANT DANGEROUS TO THE
ENVIRONMENT

10. Switch metro articles with the person
next to you!!
What level did they reach?
Did they include?
Level 4
- How could the fire service neutralise the acid
- How could the Fire Service use indicators to show
the strength of the acid?
Level 5-
Explain how neutralising the acid works with an
equation!
EXTRAS: (Level 5+)
Why was the acid spill so dangerous?
What hazard symbol might be on the lorry?

11. LO: Describe a neutralisation reaction
Level 4
Describe how to make a neutral solution
Level 5
Describe a neutralisation reaction using a
simple word equation
Level 6
Explain a SPECIFIC neutralisation reaction using
a word equation

12. Can you think of a keyword from
today’s lesson?
Write it on your post-it but
DON’T LET ANYONE SEE
Now stick it on the head of the person to your
left.
Now ask people on your table to describe the
word to see if you can guess it!