Chemistry revision form 5 - 2011 <ul><li>Topic  </li></ul><ul><li>acid base and salt </li></ul>
<ul><li>a)  Soluble and Insoluble salts </li></ul>Chlorides salts Sulphates salts soluble salts All soluble except All sol...
<ul><li>a)  Soluble and Insoluble salts </li></ul>Nitrate salts carbonate salts soluble salts All soluble Insoluble salts ...
SALT PREPARATION METHODS SOLUBLE SALTS ( must start with  ) TITRATION METHOD ( reaction between  and  ) SOLID  AND HOT ACI...
SALT PREPARATION METHODS INSOLUBLE SALT ( the reactants must be in  form) METHOD
Excess copper (II) oxide powder Acid  xxxxxxxxxxxx Heat
<ul><li>State the colour of </li></ul><ul><li>copper (II) oxide powder </li></ul><ul><li>copper(II) sulphate solution </li...
Write the chemical equation for the preparation of copper (II) sulphate. State the reason why copper (II) oxide powder is ...
Describe how to obtain pure crystals from solution of copper (II) sulphate in the beaker above.  
0.1 mol of copper (II) sulphate is produced from the reaction between acid and excess  copper (II) oxide. Calculate the ma...
Describe  chemical tests  to verify the present of  cation  in copper (II) sulphate solution.
Describe  chemical tests  to verify the present of  anion   in copper (II) sulphate solution.
Question 3 Preparation of salt  Name of method: i.Titration 0.1 mol dm-3 hydrochloric  acid method of preparation of salt ...
<ul><li>Experiment 11 </li></ul>10 cm3 of 1.0 mol dm-3 lead(II) nitrate solution Excess potassium iodide solution Name of ...
<ul><li>b.Experiment 1 </li></ul><ul><li>i.Name reaction  </li></ul><ul><li>Neutralization </li></ul><ul><li>ii.Chemical e...
<ul><li>iii. Colour change of phenolpthalein  </li></ul><ul><li>Pink to colourless </li></ul>
<ul><li>iv. Calculate Volume of HC l needed </li></ul><ul><li>Mole of NaOH= 25 x 0.1/1000 =0.005 </li></ul><ul><li>From th...
<ul><li>c.  Experiment II   </li></ul><ul><li>i.Name of salt </li></ul><ul><li>Lead(II) iodide </li></ul><ul><li>Ii. Write...
<ul><li>Iii How pure salt is obtained from the  reaction  II?  </li></ul><ul><li>Filter the mixture </li></ul><ul><li>Rins...
<ul><li>iv. Calculate maximum mass of precipitate X  </li></ul><ul><li>Mole of  Pb(NO 3 ) 2 = 10x1 /1000 </li></ul><ul><li...
<ul><li>Question 4 </li></ul><ul><li>Action of heat on salts </li></ul><ul><li>+  </li></ul><ul><li>Name gas Q  </li></ul>...
<ul><li>State the colour of  </li></ul><ul><li>COMPOUND X </li></ul><ul><li>COPPER(II) OXIDE </li></ul>GREEN BLACK
<ul><li>(III)  Chemical equation for decomposition of compound X </li></ul><ul><li>CuCO 3      CuO  + CO 2 </li></ul><ul>...
<ul><li>thank you </li></ul>&quot; Your potential as a human being…is unlimited. You have within you the ability to become...
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Revision on acid base and salt = with answers

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Revision on acid base and salt = with answers

  1. 1. Chemistry revision form 5 - 2011 <ul><li>Topic </li></ul><ul><li>acid base and salt </li></ul>
  2. 2. <ul><li>a) Soluble and Insoluble salts </li></ul>Chlorides salts Sulphates salts soluble salts All soluble except All soluble except Insoluble salts
  3. 3. <ul><li>a) Soluble and Insoluble salts </li></ul>Nitrate salts carbonate salts soluble salts All soluble Insoluble salts All insoluble except
  4. 4. SALT PREPARATION METHODS SOLUBLE SALTS ( must start with ) TITRATION METHOD ( reaction between and ) SOLID AND HOT ACID METHOD For soluble salts of salts For all soluble salts
  5. 5. SALT PREPARATION METHODS INSOLUBLE SALT ( the reactants must be in form) METHOD
  6. 6. Excess copper (II) oxide powder Acid xxxxxxxxxxxx Heat
  7. 7. <ul><li>State the colour of </li></ul><ul><li>copper (II) oxide powder </li></ul><ul><li>copper(II) sulphate solution </li></ul><ul><li>Based on Diagram, name the acid used to prepare copper (II) sulphate. </li></ul><ul><li> </li></ul>
  8. 8. Write the chemical equation for the preparation of copper (II) sulphate. State the reason why copper (II) oxide powder is added until in excess.
  9. 9. Describe how to obtain pure crystals from solution of copper (II) sulphate in the beaker above.  
  10. 10. 0.1 mol of copper (II) sulphate is produced from the reaction between acid and excess copper (II) oxide. Calculate the mass of copper (II) sulphate formed.
  11. 11. Describe chemical tests to verify the present of cation in copper (II) sulphate solution.
  12. 12. Describe chemical tests to verify the present of anion in copper (II) sulphate solution.
  13. 13. Question 3 Preparation of salt Name of method: i.Titration 0.1 mol dm-3 hydrochloric acid method of preparation of salt Experiment 1 25.0 cm3 of 0.2 mol dm-3 sodium hydroxide + phenolphthalein
  14. 14. <ul><li>Experiment 11 </li></ul>10 cm3 of 1.0 mol dm-3 lead(II) nitrate solution Excess potassium iodide solution Name of method: Double decomposition (precipitation)
  15. 15. <ul><li>b.Experiment 1 </li></ul><ul><li>i.Name reaction </li></ul><ul><li>Neutralization </li></ul><ul><li>ii.Chemical equation </li></ul><ul><li>NaOH + HCl  NaCl +H 2 O </li></ul>
  16. 16. <ul><li>iii. Colour change of phenolpthalein </li></ul><ul><li>Pink to colourless </li></ul>
  17. 17. <ul><li>iv. Calculate Volume of HC l needed </li></ul><ul><li>Mole of NaOH= 25 x 0.1/1000 =0.005 </li></ul><ul><li>From the equation, </li></ul><ul><li>0.005 mol NaOH  0.005 mol HCl </li></ul><ul><li>But mole = MV/1000 </li></ul><ul><li>So V = mole x 1000/M </li></ul><ul><li>V = 0.005 x 1000/0.1 </li></ul><ul><li>V = 50Cm 3 </li></ul>
  18. 18. <ul><li>c. Experiment II </li></ul><ul><li>i.Name of salt </li></ul><ul><li>Lead(II) iodide </li></ul><ul><li>Ii. Write Ionic equation </li></ul><ul><li>P b 2+ + 2I -  PbI 2 </li></ul>
  19. 19. <ul><li>Iii How pure salt is obtained from the reaction II? </li></ul><ul><li>Filter the mixture </li></ul><ul><li>Rinse residue with distilled water </li></ul><ul><li>Dry between two filter papers </li></ul>
  20. 20. <ul><li>iv. Calculate maximum mass of precipitate X </li></ul><ul><li>Mole of Pb(NO 3 ) 2 = 10x1 /1000 </li></ul><ul><li> = 0.01 mol </li></ul><ul><li>But </li></ul><ul><li>0.01 mole Pb 2+  0.01 mole PbI 2 </li></ul><ul><li>So mass of PbI 2 = mole x mmass </li></ul><ul><li>= 0.01x(207+ 2(127))g </li></ul><ul><li> =4.61 g </li></ul>
  21. 21. <ul><li>Question 4 </li></ul><ul><li>Action of heat on salts </li></ul><ul><li>+ </li></ul><ul><li>Name gas Q </li></ul><ul><li>CARBON DIOXIDE </li></ul><ul><li>name of COMPOUND x </li></ul><ul><li>Copper (ii) carbonate </li></ul>Compound X Copper (II) oxide Gas Q ∆
  22. 22. <ul><li>State the colour of </li></ul><ul><li>COMPOUND X </li></ul><ul><li>COPPER(II) OXIDE </li></ul>GREEN BLACK
  23. 23. <ul><li>(III) Chemical equation for decomposition of compound X </li></ul><ul><li>CuCO 3  CuO + CO 2 </li></ul><ul><li>(iv) If copper(II) nitrate is heated to replace compound X, write chemical equation </li></ul><ul><li>2Cu(NO 3 ) 2  2CuO+ </li></ul><ul><li>4NO 2 + O 2 </li></ul>
  24. 24. <ul><li>thank you </li></ul>&quot; Your potential as a human being…is unlimited. You have within you the ability to become and to achieve anything you want.&quot;

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