Year 7 Independent Learning Project. (ILP)
Ensuring Excellence
Subject: Science
ILP Title: Acids and Alkalis
In this project you will learn:
 Keywords and definitions for acids and alkalis
 To correctly identify the important variables
in a practical.
Time you should spend
on this project:
Up to 3 hours.
At the end of this project you should hand to your teacher:
A completed 6 page booklet.
You should break down your time in the following way:
Up to 20 minutes on each page of the booklet.
You may need to research some of the answers using your exercise book,
revision guide, library or internet.
Weblinks you should use to help you with this task:
www.bbc.co.uk/bitesize/KS3
Your parents may be able to help you by:
Checking you have completed all pages
Help you find the relevant information on the internet
Your
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work will be assessed by:
Having a score on each page
An overall score on the final assessment page
Self assessment
Teacher written comments
The key words to learn in this project are:
Included on page 1
Task 1: Acids & Alkalis
Find the topic words in this word search
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ACID
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CONCENTRATED
CORROSIVE
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ETHANOIC
GREEN
HYDROCHLORIC
INDICATOR
NITRIC
PURPLE
RED
SULPHURIC
NEUTRAL
HAZARD
UNIVERSAL
SOAPY
This word is NOT in the word search: ______________________
This is the colour of indicator paper in acid: __________________
This is the colour of indicator paper in alkali: _________________
A pH of 4 is an __________ and would be _________ in colour
A pH of 10 is an __________ and would be _________ in colour
Two acids found in the home: _____________________________
Task 2: Match the word to the definition
Write the correct word number next to the correct definition.
WORD
DEFINITION
1 = Acid
Can chemically attack another substance
2 = Acidic
Having a pH of 7
3 = Alkali
A number showing how acidic a chemical is
4 = Alkaline
An acid with the formula H2SO4
5 = Corrosive
Part of the body that contains hydrochloric acid
6 = Hazard
An acid with the formula HCl
7 = Hydrochloric
Acid
A chemical that has a pH of greater than 7
8 = Indicator
A chemical that has a pH of less than 7
9 = Irritant
A liquid with a solid dissolved in it
10 = Neutral
Another word for danger
11 = pH number
Description used for a chemical that is an acid
12 = Solution
An indicator that shows the pH of a solution
13 = Stomach
Description used for a chemical that is an alkali
14 = Sulphuric
Acid
A chemical that shows how acidic something is
15 = Universal
Indicator
A type of chemical that irritates the skin
Word
no.
12
A wasp sting can be treated with vinegar. What does this tell us about
the chemicals in a wasp sting? (3 marks for 3 statements)
_____________________________________________________
_____________________________________________________
_____________________________________________________
Task 3: Acids & Alkalis
Use the keywords from the previous pages to fill in the blanks
1. The pH of a liquid tells how ______________ or alkaline it is.
2. A strongly ______________ solution has a low pH (1 or 2).
3. A strongly alkaline solution has a ______________ pH (13 or 14).
4. The pH of an alkali will ______________ when an acid is added.
5. The pH of an acid will ______________ when an alkali is added.
6. To make a concentrated acid less hazardous you can add ______________.
7. Acids make universal indicator turn ______________ or yellow.
8. Alkalis make universal indicator turn ______________ or blue.
9. Acids have a ______________ taste.
10. Alkalis have a ______________ feel.
11. A reaction between an acid and alkali is called ______________.
12. Pure water is ______________ so it has a pH of 7.
13. A weak ______________ has a pH of 8 or 9.
14. A weak ______________ has a pH of 5 or 6.
15. Bleach is an ______________.
16. Lemon juice is an ______________.
17. An indicator changes ______________ in acids and alkalis.
18. Too much stomach acid causes ______________.
19. A ______________ substance attacks and destroys living tissue.
20. A wasp sting is an ______________ so it can be treated with vinegar.
Task 4: Draw lines to match each hazard symbol to its meaning.
The sentences below describe how to get a neutral solution,
starting from sodium hydroxide solution. They are in the wrong
order. Write the correct order in the box bellow.
A When the solution becomes green, stop adding acid.
B Put 10 cm3 of sodium hydroxide solution into a small conical
flask.
C Add drops of hydrochloric acid to the flask from a dropper,
counting the drops.
D Write down the number of drops of acid added.
E Gently swirl the flask after each drop of acid.
F Add a few drops of universal indicator solution so that it just
goes purple.
The correct order is: _________________________________
Complete these sentences.
i The name of this type of chemical reaction is ______________
ii The colour of the neutral solution is _____________________
Planning an Experiment.
Independent Variable: The factor in my investigation that I deliberately
choose to change.
Dependent Variable: The factor that I have to measure, that changes with
each experiment.
Control Variables: The factors I must keep the same to make my
experiment a fair test
Using the table below and the correct colour, for each of the
experiments below highlight the variables.
Variable
Independent
Dependent
Control
Colour to shade Colour to shade
RED
BLUE
YELLOW
Experiment 1 - Best conductor
Mahmoud wants to know which metal is best at conducting electricity.
He builds a circuit, using crocodile clips to connect the metal strip to it,
and measures the current.
Strip of metal
VARIABLES: Width of metal, length of metal, thickness of
metal, must be clean and new/fresh; type of metal,
temperature; type of bulb, meter, current flowing power pack.
Experiment 2 - Tesco wants to see whether its customers prefer red
grapes to green grapes.
Each customer is shown one
of each colour when they
enter the store, but they
are told they can only take
one grape.
VARIABLES: Size of grapes, cleanliness of grapes, faultless
surface, position in shop, customers choice, distance from the
customer, colour of grape
Experiment 3 - Maggie wants to know what type of sugar takes
longest to dissolve. The three types are: brown, white and demerara.
3
She puts 25g of each type in 100cm of
water and times how long they take to
dissolve completely. She uses an automatic
stirrer.
VARIABLES: Temperature of solution, particle size of sugars,
same equipment each time, speed setting on stirrer, type of
sugar, time to dissolve.
Assessment
Name______________________________________
Task 1
I got ___ out of 26
Task 2
I got ____out of 17
Class ___________
Task 3
I got _____ out of 20
Task 4
I got _____ out of 20
Overall I got _________ out of 83
To progress I need to:
(tick box)
 learn more of my key words and improve my spellings of them
 learn more scientific definitions and include keywords in these definitions
 Spend more time choosing the appropriate variables
 Plan my own experiment and select the correct variables
Teacher Comment:
WWW
EBI
Now do this…
You have received __________ vivos!!!!