Acids and bases

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Task 1

Acids and bases overview

Go through the following video and then complete the test to determine who can get the most questions correct out of 14.

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Task 2

Acids and Bases PhET simulation

Use the worksheet and the PhET simulation to investigate the effects of diluting acids and bases

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Task 3

Go through the following power point to give you a better understanding of the properties of acids and bases.

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Task 4

 

When writing neuralisation reactions, you need to know that:

Acid + Base --> Salt + Water

'Salt' referes to an ionic compound (A metal + a non-metal)

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PART A 

Watch the following video:

https://www.youtube.com/watch?v=ujkuW-0cpNw 

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READ THE FOLLOWING INFORMATION AND FINISH THE SENTENCES IN YOUR WORKBOOKS:

 

 

Acids can be found in our homes. Many fruits for example, contain acids.

 

Acid

Fruit

Citric acid

Lemons/oranges

Malic acid

Apples

Lactic acid

Sour milk/yoghurt

Tartaric acid

Grapes

 

 

 

Acids may be solids or liquids and are often poisonous.

 

All acids have something in common: they contain hydrogen in the first part of their name.

 

Sulfuric acid

Hydrogen sulfate

Hydrochloric acid

Hydrogen chloride

Nitric acid

Hydrogen nitrate

 

 

 

A way of testing a solution to see if it is acidic or not is to use a chemical substance which when added to another solution, turns a characteristic colour.

 

This chemical is called an indicator.

 

Complete the following:

 

  1. An acidic substance always contains _________________ in its name.

  2. An  _________________ is used to test a substance to see whether it is an acid or not.

  3. Another name for sulphuric acid is _______________ _________________.

 

 

 

Bases

 

Bases are really the opposite to acids. Soluble bases are called alkalis.

 

Most bases have something in common: they have hydroxide in the second part of their name.

 

Bases may also be solids or liquids.

 

Some bases are very strong and can burn skin, and must be handled carefully.

 

Bases

 

Ammonia water

Ammonium hydroxide

Limewater

Calcium hydroxide

Caustic soda

Sodium hydroxide

Milk of magnesia

Magnesium hydroxide

 

 

 

 

 

Complete

 

  1. Basic substances commonly contain ___________________ in their name.

  2. A soluble base is also called an _________________.

  3. Bases are really opposite to ______________.

  4. Caustic soda is also called ______________  _______________.

  5. Calcium hydroxide is also called __________________.

 

Edit   Delete - Last Modified By: FBA at 5/05/2016 9:17:45 AM

  PART C

  1. List at least three uses of acids and three uses of bases.

  2. How are acids and bases different from each other?

  3. What do some acids and bases have in common?

  4. What is the difference between a base and an alkali?

  5. Which acid OR base is used:

  1. To make cake rise

  2. In fizzy drinks

  3. In drain cleaners

  4. In vinegar

  5. In cleaning agents

  6. In care batteries?

  1. What is an acid-base indicator?

  2. What should you do immediately if you accidentally spill some acid on your arm in the laboratory?

 

Edit   Delete - Last Modified By: FBA at 5/05/2016 9:27:10 AM