Learning Objectives 1/11/07 Acids and Alkalis

Slides:



Advertisements
Similar presentations
Intermediate 1 Unit 1d Acids & Alkalis
Advertisements

Acids, Bases and Salts Mrs Teocc.
Acids and Alkalis Name_____________________. Universal Indicator and the pH scale Below 7 is _____ Above 7 is _________ Exactly 7 is _________ Universal.
CHEMISTRY DEPARTMENT WAID ACADEMY Unit 1 Acids and Alkalis.
Chemistry My family and home 03/07/2015. Acids and bases (alkalis) Used by the body, used in other processes: such as food, farming and chemical industries.
Acids and bases (alkalis)
Acids and Alkalis. Hazard signs to learn… hi Acid HarmfulIrritant Corrosive.
Acids, Alkalis and Indicators Prepared by Mdm RY Leow The Chinese High School.
Acids and Bases Acids Acids have a sour taste
Acids and Bases An Introduction. Acids A group of chemical compounds (more than one element) with similar properties Solutions of acids have a sour taste.
Jhonna Fe M. Cipriano Zarah C. Abu III-Radon. QUESTIONS 1. What are the physical behaviour of acids and bases? 2. How do we differentiate an acid from.
They are everywhere.. In your food In your house EVEN IN YOU!!!!!
Neutralisation Noadswood Science, 2012.
Acids and Alkalis Learning Objectives To know that solutions can be sorted by whether they are: acid, alkali or neutral. To understand that an alkali reacts.
PH Friday, 18 September Metals with Hydrochloric Acid 2 hydrogen+magnesium chloride  hydrochloric acid +magnesium Mg+HCl  MgCl 2 +H2H2 No reaction.
£1 Million £500,000 £250,000 £125,000 £64,000 £32,000 £16,000 £8,000 £4,000 £2,000 £1,000 £500 £300 £200 £100 Welcome.
Acids and bases. acids Always contain hydrogen. Always contain hydrogen. Strong or weak acids. Strong or weak acids. Common properties Sour Sour Gritty.
Making salts All Must: Be able to describe how universal indicator can be used estimate the pH of a solution and identify the strength of an acid. Most.
Chemistry Acids & Alkalis (Bases). What Acids & Alkalis are like? Acids:
Acids and Bases Chapter 3 Sections Pages
pH What is the pH of an ACID? Which type of OXIDE forms an ALKALI? Which type of OXIDE forms an ACID? What happens to the pH of an ACID when it is diluted?
Acids and alkalis Solutions can be sorted by whether they are: acid, alkali or neutral. When a substance dissolves in water it makes a solution.
ACIDS AND BASES E.Q.: How does the pH of a solution allow us to classify a solution as an acid or a base?
Acids, Bases and Salts.
Calderglen High School
Revision Quiz Acids 1 1.What is the pH scale? 2.What numbers on the pH scale show an acid? 3.What is an indicator? 4.What number is neutral? 5.What colour.
Quiz on Neutralization. 1. What happens when sodium hydroxide with litmus solution are added with hydrochloric acid slowly? The solution turns yellow.
Acids and Alkalis. Solutions can be sorted by whether they are: acid, alkali or neutral. When a substance dissolves in water it makes a solution.
Starter: complete the equations Hydrochloric acid + sodium hydroxide  __________ + ___________ Sulphuric acid + potassium hydroxide  __________ + __________.
Chapter 28 Acids & Bases 2 Revision: Chapter 24 Acids & Bases Acids are substances that turn litmus from blue to red. Bases are substances that turn litmus.
Acids and Bases Chapter 32.
Learning Objectives Acids and Alkalis
Acids and Bases Chapter 3 Sections Pages
Learning Objectives Acids and Alkalis
Acids and Bases An Introduction.
Universal Indicator can be used to find the pH of a solution
Universal Indicator can be used to find the pH of a solution
21/04/2018 Acids and Alkalis.
Dilution and Reactions of Acids
Handle acid with care!.
Reactions of Acids.
Acid and Bases Chapter 24.
Acids and Bases When a substance dissolves in water it makes a solution. Solutions can be sorted by whether they are: acid, basic (alkali) or neutral.
What is an acid? Here are some facts about acids.
What colour does a strong acid turn universal indicator?
W Richards The Weald School
Acid and Base Jeopardy! Begin.
Acids and Bases When a substance dissolves in water it makes a solution. Solutions can be sorted by whether they are: acid, basic (alkali) or neutral.
The Chemistry of Acids and Bases
Acids produce H+ in solution,
In This Section We Will Be Studying The Following Topics:
Teacher’s Notes A slide contains teacher’s notes wherever this icon is displayed - To access these notes go to ‘Notes Page View’ (PowerPoint 97) or ‘Normal.
W Richards Worthing High School
28/11/2018 Acids and Alkalis.
Learning Objectives 1/11/07 Acids and Alkalis
W Richards The Weald School
Learning Objectives Acids and Alkalis
Making salts All Must: Be able to describe how to neutralise an acid
Reactions of Acids.
Chapter 3.2L Acids, Bases, and Salts.
W Richards Worthing High School
Describing Acids and Bases
Acids and Bases.
Learning Objectives Acids and Alkalis
Year 7 multiple-choice main test 7E Acids and alkalis
Chapter 4: Acids and Alkalis
Presentation transcript:

Learning Objectives 1/11/07 Acids and Alkalis To know that solutions can be sorted by whether they are: acid, alkali or neutral. To understand that an alkali reacts with an acid to cancel it out. To know that indicators show you how acidic or alkaline a solution is.

Acids and alkalis When a substance dissolves in water it makes a solution. Solutions can be sorted by whether they are: acid, alkali or neutral.

When the oxide of some non-metals dissolve in water they make an acid. Acids have a sour taste. They are corrosive.

Acids react with metals and carbonates. Metal + Acid Salt + Hydrogen magnesium + magnesium chloride + hydrochloric acid hydrogen Acid + Carbonate Salt + Water + Carbon dioxide sulphuric acid + copper sulphate + water + copper carbonate carbon dioxide

Acids There are many acids present in our everyday lives. Lemon juice contains citric acid, and vinegar contains ethanoic acid. Some strong acids are hydrochloric acid, sulphuric acid and nitric acid. Some weak acids are ethanoic acid, citric acid and carbonic acid.

Neutralisation Acids and alkalis react with each other. The alkali cancels out the acid in the reaction. This is called neutralisation. A salt is made.

Salts The salt made depends on the acid and alkali used. The salt contains the metal atom from the alkali, and part of the acid molecule. The salts of sulphuric acid are known as sulphates. The salts of hydrochloric acid are known as chlorides. The salts of nitric acid are known as nitrates.

Alkalis Many everyday substances are alkalis. They feel soapy. They are corrosive. When the oxides of some metals dissolve in water they make an alkali solution. Alkalis react with acids and neutralise them.

Alkalis Alkalis are present in many cleaning substances in use in our homes. Kitchen cleaners are alkaline because they contain ammonia or sodium hydroxide, which attack grease. Calcium hydroxide and sodium hydroxide are strong alkalis. The most recognisable and common weak alkali is ammonia.

Indicators Indicators help you find out whether a solution is acidic or not. They change colour in acid or alkaline solutions. Different indicators change to different colours.

Litmus Test Litmus is an indicator. It changes colour in acid and alkaline solutions. Litmus is red in an acid. Litmus is blue in an alkali.

Universal Indicator Universal indicator changes colour in acids and alkalis. ACIDS ALKALIS Neutral Its colour shows the strength of an acid or alkali.

The pH scale 1 – 6 8 - 14 Alkalis 7 Acids Neutral

Applications of Neutralisation Insect Stings Bee stings are acidic and can be neutralised with baking soda (bicarbonate of soda). Wasp stings are alkaline and can be neutralised with vinegar. Indigestion: Our stomach carries around hydrochloric acid. Too much of this leads to indigestion. To cure indigestion, you can neutralise the excess acid with baking soda or specialised indigestion tablets.

More Applications of Neutralisation Factory Waste: Liquid waste from factories is often acidic. If it reaches a river it will destroy and kill sea life of many forms. Neutralising the waste with slaked lime can prevent this. Soil Treatment: When soils are too acidic (often as a result of acid rain) they can be treated with slaked lime, chalk or quicklime, all alkalis. Plants and crops grow best in neutral soils. More Applications of Neutralisation