Table of Contents

 

Week 1 | English Grammar

Day 1| Auxiliary verbs

Day 2 |Am/is/are

Day 3 |Am/is/are Questions

Day 4 |I am doing (present continuous)

Day 5 |Are you doing? (present continuous questions)

Day 6 |I do/work/like (present simple)(present continuous questions)

Week 2 | English Grammar

Day 1 |I don't... (present simple negative)

Day 2 |Do you...? (present simple questions)

Day 3 |I am doing (present continuous) I do (present simple)

Day 4 |I have... and I've got...

Day 5 |Was/were

Day 6 |Worked/got/went etc (past simple)

Week 3 | English Grammar

Day 1 |I didn't... did you...? (past simple negative and questions)

Day 2 |I was doing (past continuous)

Day 3 |I was doing (past continuous) and I did (past simple)

Day 4 |I have done (present perfect 1)

Day 5 |I've just... I've already... I haven't...yet (present perfect 2)

Day 6 |Have you ever...? (present perfect 3)

Week 4| English Grammar

Day 1 |How long have you...? (present perfect 4)

Day 2 |For, since, ago

Day 3 |I have done (present perfect) and I did (past)

Day 4 |Is done, was done (passive 1)

Day 5 |Is being done, has been done (passive 2)

Day 6 |Be/have/do in present and past tenses

Week 5| English Grammar

Day 1 |Regular and irregular verbs

Day 2 |What are you doing tomorrow?

Day 3 |I'm going to...

Day 4 |Will/shall (1)

Day 5 |Will/shall (2)

Day 6 |Might

Week 6| English Grammar

Day 1 |Can and could

Day 2 |Must, mustn't, don't, need to

Day 3 |Should

Day 4 |I have to

Day 5 |Would you like...?

Day 6 |Do this! Don't do that! Let's do that

Week 7| English Grammar

Day 1 |I used to...

Day 2 |There is... There are...

Day 3 |There was/were... There has/have been... There will be...

Day 4 |It...

Day 5 |I am, I don't

Day 6 |Have you? Are you? Don't you? etc

Week 8| English Grammar

Day 1 |Too/either/so am I/neither do I etc

Day 2 |Isn't/haven't/don't etc (negatives)

Day 3 |Do they? Is it? Have you?

Day 4 |Forming questions (who/what/why/where/when/which)

Day 5 |What...? Which...? How...?

Day 6 |How long does it take...?

Week 9| English Grammar

Day 1 |Do you know where...? I don't know what... etc

Day 2 |He/she said that... He/she told me that...

Day 3 |Work/working Go/going Do/doing

Day 4 |I want you to... I told you to...

Day 5 |I went to the shop to...

Day 6 |Go to... Go on... Go for... Go -ing... Get…

Week 10| English Grammar

Day 1 |Get...

Day 2 |Do and make

Day 3 |Have...

Day 4 |I/me He/him They/them etc

Day 5 |My/his/their etc

Day 6 |Whose is this? It's mine/yours/hers etc

Week 11| English Grammar

Day 1 |Myself/yourself/themselves etc

Day 2 |A/an...

Day 3 |Singular & plural

Day 4 |The...

Day 5 |Go to...

Day 6 |This/that/these/those

Week 12| English Grammar

Day 1 |Some & any

Day 2 |All/most/some/any/no/none etc

Day 3 |Adjectives

Day 4 |Adverbs

Day 5 |Imperatives

Day 6 |And but or so because

Week 13| English Grammar

Day 1 |When...

Day 2 |If we go... if you see... etc

Day 3 |If I had... If we went... etc

Day 4 |A person who... A thing that/which (relative clauses 1)

Day 5 |How long have you…?(present perfect 4)

Day 6 |For since ago

Introduction to Acids and Alkalis


Acids are liquids which are solutions of compounds in water. For example, hydrochloric acid is a solution of hydrogen chloride. They have a lot of hydrogen ions (H+) in them. Strong acids, or highly concentrated acids, can be corrosive because they’re so reactive, so they must be handled with care.

Alkalis are the solutions of bases, such as sodium hydroxide. A lot of bases are insoluble, therefore, they cannot be alkalis, BUT all alkalis can be bases. They contain hydroxide ions (OH).  Like acids, they can also be corrosive if they’re concentrated, so they must also be handled with care.

While acids and alkalis can be dangerous, they can also be very helpful in our daily lives, if used correctly. For example, you might not know that you’ve been sprinkling ethanoic acid over your fish and chips! (Ethanoic acid is the chemical name for vinegar). Lots of alkalis are used in household cleaning products, like bleach and laundry detergent. Fruits and vegetables also have natural acids in them – especially citric fruit, like lemons and oranges.

 

Common examples of acids Common examples of alkalis
Ethanoic acid (Vinegar) Ammonia
Citric acid (Lemon Juice) Sodium hydroxide
Hydrochloric Acid ( used in the lab and found in the stomach) Magnesium hydroxide (used for indigestion)
Carbonic acid (Fizzy drinks) Sodium bicarbonate (baking soda)
Sulphuric Acid Barium hydroxide

Properties of acids

  • Acids have a pH of less than 7
  • They contain hydrogen ions (H+)
  • They turn litmus paper to red
  • They have a sour taste (DON’T CHECK THIS)
  • They can be corrosive or irritant

 

Properties of alkalis

  • Alkalis have a pH of more than 7
  • They are dissolved bases
  • They contain hydroxide ions (OH)
  • They turn Litmus paper blue
  • They have a slippery, soapy feel
  • They have a bitter taste (DON’T CHECK THIS)
  • They can be corrosive or irritant

 

Warning Symbols

These are some hazard symbols you may see on the acids and alkalis in the lab. You need to know what they are so that you can act safely around them

This sign means that the chemical is toxic. Anyone who handles this chemical should be wearing safety goggles and gloves, and may need to use a fume cupboard as well.

 

This sign means that the chemical is an irritant. Anyone handling this should be wearing goggles and if any spills onto their skin, they should wash it off immediately

 

This sign means that the chemical is corrosive. Anyone handling this chemical should protect their eyes with safety goggles and wear gloves.

 

This sign means that the chemical is highly flammable. In addition to wearing goggles, anyone handling this chemical should take care to keep it away from any open flames or oxidising materials.

 

 

 

KS3 Chemistry Questions– Introduction to Acids and Alkalis


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1. What do acids have a high concentration of?

a. Hydroxide ions
b. Hydrogen ions
c. Hydrogen atoms
d. Water
e. Chlorine

2. All acids and alkalis are dangerous

a. True
b. False

3. What roles do alkalis play in our daily lives?

a. Seasoning food
b. Cleaning products
c. Perfume
d. Petrol

4. Which of these naturally contains acid?

a. Sugar
b. Flour
c. Apples
d. Water
e. Wood

5. Which of these is NOT a property of an alkali?

a. Bitter taste
b. Fruity smell
c. pH of more than 7
d. Turn Litmus paper blue
e. Slippery/soapy feel

1. What is an alkali?

2. Give three examples of common alkali

3. Give three examples of common acids

4. What does mean?

5. How should a corrosive substance be handled?

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