Your SlideShare is downloading. ×
0
Chapter 7 ACIDS AND BASES
What is acid? <ul><ul><li>a substance that ionizes in water to produce hydrogen ions, H+ </li></ul></ul><ul><li>What is ba...
<ul><li>Chemical properties of acid </li></ul><ul><ul><li>Sour taste </li></ul></ul><ul><ul><li>pH less than 7 </li></ul><...
Chemical properties of base <ul><ul><li>Bitter/smooth/soapy </li></ul></ul><ul><ul><li>pH more than 7 </li></ul></ul><ul><...
Uses of acids in daily life <ul><ul><li>Sulphuric acid – paints, detegents, polymers, fertilisers </li></ul></ul><ul><ul><...
Role of water in the formation of hydrogen ions <ul><ul><li>In the presence of water, an acid will ionize to form the hydr...
Role of water in the formation of hydroxide ions <ul><ul><li>In the presence of water, alkali will dissociate to form hydr...
pH scale
<ul><ul><li>A set of numbers used to show the degree of acidity and alkalinity of a solution </li></ul></ul><ul><ul><li>pH...
pH values <ul><li>Higher pH value  </li></ul><ul><ul><li>more alkaline </li></ul></ul><ul><ul><li>higher concentration of ...
<ul><ul><li>pH is actually a measurement of the concentration of hydrogen, H+ in a solution </li></ul></ul><ul><ul><li>The...
Acid <ul><ul><li>Strong acid   is an acid that dissociate (ionize ) completely in water to form hydrogen ion,H+ of high co...
<ul><ul><li>Mineral acids such as hydrochloric acid, nitric acid, and sulphuric acid are strong acids </li></ul></ul><ul><...
Alkali <ul><ul><li>Strong alkali   is produce when a base dissociates completely in water to produce hydroxide ions, OH- o...
<ul><ul><li>Strong alkali- sodium hydroxide, potassium hydroxide </li></ul></ul><ul><ul><li>Weak alkali- ammonia solution ...
EDITED BY : Noor Laili binti Mohamad Elias D20091034948 ISMP KIMIA 2009/2010 Thank you
Upcoming SlideShare
Loading in...5
×

ACIDS AND BASES

2,483

Published on

Published in: Education
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,483
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
125
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide

Transcript of "ACIDS AND BASES"

  1. 1. Chapter 7 ACIDS AND BASES
  2. 2. What is acid? <ul><ul><li>a substance that ionizes in water to produce hydrogen ions, H+ </li></ul></ul><ul><li>What is base? </li></ul><ul><ul><li>a substance that reacts with an acid to </li></ul></ul><ul><li>form only salt and water </li></ul><ul><li>What is alkali? </li></ul><ul><ul><li>Soluble bases that produce OH ¯ ions in water </li></ul></ul>
  3. 3. <ul><li>Chemical properties of acid </li></ul><ul><ul><li>Sour taste </li></ul></ul><ul><ul><li>pH less than 7 </li></ul></ul><ul><ul><li>Corrosive </li></ul></ul><ul><ul><li>Conduct electricity </li></ul></ul><ul><ul><li>Acid can react with </li></ul></ul><ul><li>a) bases to produce salts and water </li></ul><ul><li>b) metals to produce salts and hydrogen gas </li></ul><ul><li>c) carbonates to produce salts , carbon dioxide gas and water </li></ul>
  4. 4. Chemical properties of base <ul><ul><li>Bitter/smooth/soapy </li></ul></ul><ul><ul><li>pH more than 7 </li></ul></ul><ul><ul><li>Corrosive </li></ul></ul><ul><ul><li>Conduct electricity </li></ul></ul><ul><ul><li>Base can react with </li></ul></ul><ul><li>a)Acid to produce a salt and water </li></ul><ul><li>b)Heated with ammonium salt to produce ammonia gas </li></ul><ul><li>video </li></ul>
  5. 5. Uses of acids in daily life <ul><ul><li>Sulphuric acid – paints, detegents, polymers, fertilisers </li></ul></ul><ul><ul><li>Carbonic acid- make carbonated drinks </li></ul></ul><ul><ul><li>Ethanoic acid- vinegar </li></ul></ul><ul><li>Uses of base in daily life </li></ul><ul><ul><li>Sodium hydroxide – soaps, detergents, bleaching agents </li></ul></ul><ul><ul><li>Magnesium hydroxide – toothpaste </li></ul></ul><ul><ul><li>Ammonia- fertilisers </li></ul></ul>
  6. 6. Role of water in the formation of hydrogen ions <ul><ul><li>In the presence of water, an acid will ionize to form the hydrogen ions, H + </li></ul></ul><ul><ul><li>So, water is essential for the formation of hydrogen ions that cause acidity </li></ul></ul>
  7. 7. Role of water in the formation of hydroxide ions <ul><ul><li>In the presence of water, alkali will dissociate to form hydroxide ions, OH¯ </li></ul></ul><ul><ul><li>Hence, water is essential for the formation of hydroxide ions that cause alkalinity </li></ul></ul>
  8. 8. pH scale
  9. 9. <ul><ul><li>A set of numbers used to show the degree of acidity and alkalinity of a solution </li></ul></ul><ul><ul><li>pH values of less than 7 indicates an acidic solution </li></ul></ul><ul><ul><li>pH values of more than 7 indicates an alkaline solution </li></ul></ul><ul><ul><li>pH values of 7 indicates a neutral solution </li></ul></ul>
  10. 10. pH values <ul><li>Higher pH value </li></ul><ul><ul><li>more alkaline </li></ul></ul><ul><ul><li>higher concentration of hydroxide ion </li></ul></ul><ul><li>Lower pH value </li></ul><ul><ul><li>more acidic </li></ul></ul><ul><ul><li>higher concentration of hydrogen ion </li></ul></ul><ul><li>When acids meets base </li></ul>
  11. 11. <ul><ul><li>pH is actually a measurement of the concentration of hydrogen, H+ in a solution </li></ul></ul><ul><ul><li>The higher the concentration of the H+ </li></ul></ul><ul><li>ions, the lower the pH value, and more acidic the solution is </li></ul><ul><ul><li>The higher the concentration of the OH¯ ions, the higher the pH value and the more alkaline solution the solution is. </li></ul></ul>
  12. 12. Acid <ul><ul><li>Strong acid is an acid that dissociate (ionize ) completely in water to form hydrogen ion,H+ of high concentration </li></ul></ul><ul><ul><li>Weak acid is an acid that dissociate (ionize ) partially in water to produce hydrogen ions,H+ of low concentration. </li></ul></ul>
  13. 13. <ul><ul><li>Mineral acids such as hydrochloric acid, nitric acid, and sulphuric acid are strong acids </li></ul></ul><ul><ul><li>Weak acids-ethanoic acid, methanoic acid, citric acid, tartaric acid </li></ul></ul>
  14. 14. Alkali <ul><ul><li>Strong alkali is produce when a base dissociates completely in water to produce hydroxide ions, OH- of high concentration </li></ul></ul><ul><ul><li>Weak alkali is produced when a base dissociates partially to produce hydroxide ions, OH- of low concentration. </li></ul></ul>
  15. 15. <ul><ul><li>Strong alkali- sodium hydroxide, potassium hydroxide </li></ul></ul><ul><ul><li>Weak alkali- ammonia solution </li></ul></ul>
  16. 16. EDITED BY : Noor Laili binti Mohamad Elias D20091034948 ISMP KIMIA 2009/2010 Thank you
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×